| | | 1 | | using System.Threading; |
| | | 2 | | |
| | | 3 | | namespace Towel; |
| | | 4 | | #region ILazy<T> |
| | | 5 | | |
| | | 6 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 7 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 8 | | public interface ILazy<T> |
| | | 9 | | { |
| | | 10 | | /// <summary>The pattern of thread safety this lazy is using.</summary> |
| | | 11 | | LazyThreadSafetyMode ThreadSafety { get; } |
| | | 12 | | /// <summary>Gets the lazily initialized value.</summary> |
| | | 13 | | T Value { get; } |
| | | 14 | | /// <summary>True if <see cref="Value"/> has been initialized.</summary> |
| | | 15 | | bool IsValueCreated { get; } |
| | | 16 | | /// <summary>True if exceptions thrown by the factory delegate are being cached.</summary> |
| | | 17 | | bool IsCachingExceptions { get; } |
| | | 18 | | /// <summary>True if the lazy is safe from struct copies.</summary> |
| | | 19 | | bool IsStructCopySafe { get; } |
| | | 20 | | } |
| | | 21 | | |
| | | 22 | | #endregion |
| | | 23 | | |
| | | 24 | | #region SLazyReference<T> |
| | | 25 | | |
| | | 26 | | internal class SLazyReference<T> |
| | | 27 | | { |
| | | 28 | | internal Func<T>? _func; |
| | | 29 | | internal T? _value; |
| | | 30 | | |
| | | 31 | | internal SLazyReference(Func<T> func) => _func = func; |
| | | 32 | | |
| | | 33 | | internal T GetValueSafe() |
| | | 34 | | { |
| | | 35 | | lock (this) |
| | | 36 | | { |
| | | 37 | | if (_func is not null) |
| | | 38 | | { |
| | | 39 | | try |
| | | 40 | | { |
| | | 41 | | _value = _func(); |
| | | 42 | | _func = null; |
| | | 43 | | } |
| | | 44 | | catch (Exception exception) |
| | | 45 | | { |
| | | 46 | | _func = () => throw exception; |
| | | 47 | | throw; |
| | | 48 | | } |
| | | 49 | | } |
| | | 50 | | } |
| | | 51 | | return _value!; |
| | | 52 | | } |
| | | 53 | | |
| | | 54 | | internal T GetValuePublicationLock() |
| | | 55 | | { |
| | | 56 | | Func<T>? func = _func; |
| | | 57 | | if (func is not null) |
| | | 58 | | { |
| | | 59 | | try |
| | | 60 | | { |
| | | 61 | | T value = func(); |
| | | 62 | | lock (this) |
| | | 63 | | { |
| | | 64 | | if (_func is not null) |
| | | 65 | | { |
| | | 66 | | if (ReferenceEquals(_func, func)) |
| | | 67 | | { |
| | | 68 | | _value = value; |
| | | 69 | | _func = null; |
| | | 70 | | } |
| | | 71 | | else |
| | | 72 | | { |
| | | 73 | | _ = _func(); |
| | | 74 | | } |
| | | 75 | | } |
| | | 76 | | } |
| | | 77 | | } |
| | | 78 | | catch (Exception exception) |
| | | 79 | | { |
| | | 80 | | lock (this) |
| | | 81 | | { |
| | | 82 | | if (_func is not null) |
| | | 83 | | { |
| | | 84 | | if (ReferenceEquals(_func, func)) |
| | | 85 | | { |
| | | 86 | | _func = () => throw exception; |
| | | 87 | | throw; |
| | | 88 | | } |
| | | 89 | | else |
| | | 90 | | { |
| | | 91 | | _ = _func(); |
| | | 92 | | } |
| | | 93 | | } |
| | | 94 | | } |
| | | 95 | | } |
| | | 96 | | } |
| | | 97 | | return _value!; |
| | | 98 | | } |
| | | 99 | | |
| | | 100 | | internal T GetValuePublicationLockNoCatch() |
| | | 101 | | { |
| | | 102 | | Func<T>? func = _func; |
| | | 103 | | if (func is not null) |
| | | 104 | | { |
| | | 105 | | T value = func(); |
| | | 106 | | lock (this) |
| | | 107 | | { |
| | | 108 | | if (_func is not null) |
| | | 109 | | { |
| | | 110 | | _value = value; |
| | | 111 | | _func = null; |
| | | 112 | | } |
| | | 113 | | } |
| | | 114 | | } |
| | | 115 | | return _value!; |
| | | 116 | | } |
| | | 117 | | |
| | | 118 | | internal T GetValueNoLock() |
| | | 119 | | { |
| | | 120 | | if (_func is not null) |
| | | 121 | | { |
| | | 122 | | try |
| | | 123 | | { |
| | | 124 | | _value = _func(); |
| | | 125 | | _func = null; |
| | | 126 | | } |
| | | 127 | | catch (Exception exception) |
| | | 128 | | { |
| | | 129 | | _func = () => throw exception; |
| | | 130 | | throw; |
| | | 131 | | } |
| | | 132 | | } |
| | | 133 | | return _value!; |
| | | 134 | | } |
| | | 135 | | |
| | | 136 | | internal T GetValueNoCatch() |
| | | 137 | | { |
| | | 138 | | lock (this) |
| | | 139 | | { |
| | | 140 | | if (_func is not null) |
| | | 141 | | { |
| | | 142 | | _value = _func(); |
| | | 143 | | _func = null; |
| | | 144 | | } |
| | | 145 | | } |
| | | 146 | | return _value!; |
| | | 147 | | } |
| | | 148 | | |
| | | 149 | | internal T GetValueNoLockNoCatch() |
| | | 150 | | { |
| | | 151 | | if (_func is not null) |
| | | 152 | | { |
| | | 153 | | _value = _func(); |
| | | 154 | | _func = null; |
| | | 155 | | } |
| | | 156 | | return _value!; |
| | | 157 | | } |
| | | 158 | | } |
| | | 159 | | |
| | | 160 | | #endregion |
| | | 161 | | |
| | | 162 | | #region SLazy<T> |
| | | 163 | | |
| | | 164 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 165 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 166 | | public struct SLazy<T> : ILazy<T> |
| | | 167 | | { |
| | | 168 | | internal SLazyReference<T>? _reference; |
| | | 169 | | internal T? _value; |
| | | 170 | | |
| | | 171 | | /// <inheritdoc /> |
| | | 172 | | public bool IsValueCreated |
| | | 173 | | { |
| | | 174 | | get |
| | | 175 | | { |
| | | 176 | | SLazyReference<T>? reference = _reference; |
| | | 177 | | if (reference is not null) |
| | | 178 | | { |
| | | 179 | | if (reference._func is null) |
| | | 180 | | { |
| | | 181 | | _value = reference._value; |
| | | 182 | | _reference = null; |
| | | 183 | | return true; |
| | | 184 | | } |
| | | 185 | | return false; |
| | | 186 | | } |
| | | 187 | | return true; |
| | | 188 | | } |
| | | 189 | | } |
| | | 190 | | |
| | | 191 | | /// <inheritdoc /> |
| | | 192 | | public T Value |
| | | 193 | | { |
| | | 194 | | get |
| | | 195 | | { |
| | | 196 | | if (_reference is not null) |
| | | 197 | | { |
| | | 198 | | _value = _reference.GetValueSafe(); |
| | | 199 | | _reference = null; |
| | | 200 | | } |
| | | 201 | | return _value!; |
| | | 202 | | } |
| | | 203 | | } |
| | | 204 | | |
| | | 205 | | /// <inheritdoc /> |
| | | 206 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.ExecutionAndPublication; |
| | | 207 | | |
| | | 208 | | /// <inheritdoc /> |
| | | 209 | | public bool IsCachingExceptions => true; |
| | | 210 | | |
| | | 211 | | /// <inheritdoc /> |
| | | 212 | | public bool IsStructCopySafe => true; |
| | | 213 | | |
| | | 214 | | /// <summary>Constructs a new <see cref="SLazy{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 215 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 216 | | public SLazy(T value) |
| | | 217 | | { |
| | | 218 | | _reference = null; |
| | | 219 | | _value = value; |
| | | 220 | | } |
| | | 221 | | |
| | | 222 | | /// <summary>Constructs a new <see cref="SLazy{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 223 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 224 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 225 | | public SLazy(Func<T> func) |
| | | 226 | | { |
| | | 227 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 228 | | _value = default; |
| | | 229 | | _reference = new(func); |
| | | 230 | | } |
| | | 231 | | |
| | | 232 | | /// <summary>Constructs a new <see cref="SLazy{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 233 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 234 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 235 | | public static implicit operator SLazy<T>(Func<T> func) => new(func); |
| | | 236 | | |
| | | 237 | | /// <summary>Constructs a new <see cref="SLazy{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 238 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 239 | | public static implicit operator SLazy<T>(T value) => new(value); |
| | | 240 | | |
| | | 241 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 242 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 243 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 244 | | public override bool Equals(object? obj) |
| | | 245 | | { |
| | | 246 | | if (obj is SLazy<T> slazy) |
| | | 247 | | { |
| | | 248 | | obj = slazy.Value; |
| | | 249 | | } |
| | | 250 | | return (Value, obj) switch |
| | | 251 | | { |
| | | 252 | | (null, null) => true, |
| | | 253 | | (_, null) => false, |
| | | 254 | | (null, _) => false, |
| | | 255 | | _ => Value!.Equals(obj), |
| | | 256 | | }; |
| | | 257 | | } |
| | | 258 | | |
| | | 259 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 260 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 261 | | public override string? ToString() => Value?.ToString(); |
| | | 262 | | |
| | | 263 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 264 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 265 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 266 | | |
| | | 267 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 268 | | /// <param name="left">The first value of the equality check.</param> |
| | | 269 | | /// <param name="right">The second value of the equality check.</param> |
| | | 270 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 271 | | public static bool operator ==(SLazy<T> left, SLazy<T> right) => left.Equals(right); |
| | | 272 | | |
| | | 273 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 274 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 275 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 276 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 277 | | public static bool operator !=(SLazy<T> left, SLazy<T> right) => !(left == right); |
| | | 278 | | } |
| | | 279 | | |
| | | 280 | | #endregion |
| | | 281 | | |
| | | 282 | | #region SLazyNoCatch<T> |
| | | 283 | | |
| | | 284 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 285 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 286 | | public struct SLazyNoCatch<T> : ILazy<T> |
| | | 287 | | { |
| | | 288 | | internal SLazyReference<T>? _reference; |
| | | 289 | | internal T? _value; |
| | | 290 | | |
| | | 291 | | /// <inheritdoc /> |
| | | 292 | | public bool IsValueCreated |
| | | 293 | | { |
| | | 294 | | get |
| | | 295 | | { |
| | | 296 | | SLazyReference<T>? reference = _reference; |
| | | 297 | | if (reference is not null) |
| | | 298 | | { |
| | | 299 | | if (reference._func is null) |
| | | 300 | | { |
| | | 301 | | _value = reference._value; |
| | | 302 | | _reference = null; |
| | | 303 | | return true; |
| | | 304 | | } |
| | | 305 | | return false; |
| | | 306 | | } |
| | | 307 | | return true; |
| | | 308 | | } |
| | | 309 | | } |
| | | 310 | | |
| | | 311 | | /// <inheritdoc /> |
| | | 312 | | public T Value |
| | | 313 | | { |
| | | 314 | | get |
| | | 315 | | { |
| | | 316 | | if (_reference is not null) |
| | | 317 | | { |
| | | 318 | | _value = _reference.GetValueNoCatch(); |
| | | 319 | | _reference = null; |
| | | 320 | | } |
| | | 321 | | return _value!; |
| | | 322 | | } |
| | | 323 | | } |
| | | 324 | | |
| | | 325 | | /// <inheritdoc /> |
| | | 326 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.ExecutionAndPublication; |
| | | 327 | | |
| | | 328 | | /// <inheritdoc /> |
| | | 329 | | public bool IsCachingExceptions => false; |
| | | 330 | | |
| | | 331 | | /// <inheritdoc /> |
| | | 332 | | public bool IsStructCopySafe => true; |
| | | 333 | | |
| | | 334 | | /// <summary>Constructs a new <see cref="SLazyNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 335 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 336 | | public SLazyNoCatch(T value) |
| | | 337 | | { |
| | | 338 | | _reference = null; |
| | | 339 | | _value = value; |
| | | 340 | | } |
| | | 341 | | |
| | | 342 | | /// <summary>Constructs a new <see cref="SLazyNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 343 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 344 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 345 | | public SLazyNoCatch(Func<T> func) |
| | | 346 | | { |
| | | 347 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 348 | | _value = default; |
| | | 349 | | _reference = new(func); |
| | | 350 | | } |
| | | 351 | | |
| | | 352 | | /// <summary>Constructs a new <see cref="SLazyNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 353 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 354 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 355 | | public static implicit operator SLazyNoCatch<T>(Func<T> func) => new(func); |
| | | 356 | | |
| | | 357 | | /// <summary>Constructs a new <see cref="SLazyNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 358 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 359 | | public static implicit operator SLazyNoCatch<T>(T value) => new(value); |
| | | 360 | | |
| | | 361 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 362 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 363 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 364 | | public override bool Equals(object? obj) |
| | | 365 | | { |
| | | 366 | | if (obj is SLazyNoCatch<T> slazy) |
| | | 367 | | { |
| | | 368 | | obj = slazy.Value; |
| | | 369 | | } |
| | | 370 | | return (Value, obj) switch |
| | | 371 | | { |
| | | 372 | | (null, null) => true, |
| | | 373 | | (_, null) => false, |
| | | 374 | | (null, _) => false, |
| | | 375 | | _ => Value!.Equals(obj), |
| | | 376 | | }; |
| | | 377 | | } |
| | | 378 | | |
| | | 379 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 380 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 381 | | public override string? ToString() => Value?.ToString(); |
| | | 382 | | |
| | | 383 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 384 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 385 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 386 | | |
| | | 387 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 388 | | /// <param name="left">The first value of the equality check.</param> |
| | | 389 | | /// <param name="right">The second value of the equality check.</param> |
| | | 390 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 391 | | public static bool operator ==(SLazyNoCatch<T> left, SLazyNoCatch<T> right) => left.Equals(right); |
| | | 392 | | |
| | | 393 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 394 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 395 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 396 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 397 | | public static bool operator !=(SLazyNoCatch<T> left, SLazyNoCatch<T> right) => !(left == right); |
| | | 398 | | } |
| | | 399 | | |
| | | 400 | | #endregion |
| | | 401 | | |
| | | 402 | | #region SLazyNoLock<T> |
| | | 403 | | |
| | | 404 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 405 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 406 | | public struct SLazyNoLock<T> : ILazy<T> |
| | | 407 | | { |
| | | 408 | | internal SLazyReference<T>? _reference; |
| | | 409 | | internal T? _value; |
| | | 410 | | |
| | | 411 | | /// <inheritdoc /> |
| | | 412 | | public bool IsValueCreated |
| | | 413 | | { |
| | | 414 | | get |
| | | 415 | | { |
| | | 416 | | SLazyReference<T>? reference = _reference; |
| | | 417 | | if (reference is not null) |
| | | 418 | | { |
| | | 419 | | if (reference._func is null) |
| | | 420 | | { |
| | | 421 | | _value = reference._value; |
| | | 422 | | _reference = null; |
| | | 423 | | return true; |
| | | 424 | | } |
| | | 425 | | return false; |
| | | 426 | | } |
| | | 427 | | return true; |
| | | 428 | | } |
| | | 429 | | } |
| | | 430 | | |
| | | 431 | | /// <inheritdoc /> |
| | | 432 | | public T Value |
| | | 433 | | { |
| | | 434 | | get |
| | | 435 | | { |
| | | 436 | | if (_reference is not null) |
| | | 437 | | { |
| | | 438 | | _value = _reference.GetValueNoLock(); |
| | | 439 | | _reference = null; |
| | | 440 | | } |
| | | 441 | | return _value!; |
| | | 442 | | } |
| | | 443 | | } |
| | | 444 | | |
| | | 445 | | /// <inheritdoc /> |
| | | 446 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.None; |
| | | 447 | | |
| | | 448 | | /// <inheritdoc /> |
| | | 449 | | public bool IsCachingExceptions => true; |
| | | 450 | | |
| | | 451 | | /// <inheritdoc /> |
| | | 452 | | public bool IsStructCopySafe => true; |
| | | 453 | | |
| | | 454 | | /// <summary>Constructs a new <see cref="SLazyNoLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 455 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 456 | | public SLazyNoLock(T value) |
| | | 457 | | { |
| | | 458 | | _reference = null; |
| | | 459 | | _value = value; |
| | | 460 | | } |
| | | 461 | | |
| | | 462 | | /// <summary>Constructs a new <see cref="SLazyNoLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 463 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 464 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 465 | | public SLazyNoLock(Func<T> func) |
| | | 466 | | { |
| | | 467 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 468 | | _value = default; |
| | | 469 | | _reference = new(func); |
| | | 470 | | } |
| | | 471 | | |
| | | 472 | | /// <summary>Constructs a new <see cref="SLazyNoLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 473 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 474 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 475 | | public static implicit operator SLazyNoLock<T>(Func<T> func) => new(func); |
| | | 476 | | |
| | | 477 | | /// <summary>Constructs a new <see cref="SLazyNoLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 478 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 479 | | public static implicit operator SLazyNoLock<T>(T value) => new(value); |
| | | 480 | | |
| | | 481 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 482 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 483 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 484 | | public override bool Equals(object? obj) |
| | | 485 | | { |
| | | 486 | | if (obj is SLazyNoLock<T> slazy) |
| | | 487 | | { |
| | | 488 | | obj = slazy.Value; |
| | | 489 | | } |
| | | 490 | | return (Value, obj) switch |
| | | 491 | | { |
| | | 492 | | (null, null) => true, |
| | | 493 | | (_, null) => false, |
| | | 494 | | (null, _) => false, |
| | | 495 | | _ => Value!.Equals(obj), |
| | | 496 | | }; |
| | | 497 | | } |
| | | 498 | | |
| | | 499 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 500 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 501 | | public override string? ToString() => Value?.ToString(); |
| | | 502 | | |
| | | 503 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 504 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 505 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 506 | | |
| | | 507 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 508 | | /// <param name="left">The first value of the equality check.</param> |
| | | 509 | | /// <param name="right">The second value of the equality check.</param> |
| | | 510 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 511 | | public static bool operator ==(SLazyNoLock<T> left, SLazyNoLock<T> right) => left.Equals(right); |
| | | 512 | | |
| | | 513 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 514 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 515 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 516 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 517 | | public static bool operator !=(SLazyNoLock<T> left, SLazyNoLock<T> right) => !(left == right); |
| | | 518 | | } |
| | | 519 | | |
| | | 520 | | #endregion |
| | | 521 | | |
| | | 522 | | #region SLazyNoLockNoCatch<T> |
| | | 523 | | |
| | | 524 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 525 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 526 | | public struct SLazyNoLockNoCatch<T> : ILazy<T> |
| | | 527 | | { |
| | | 528 | | internal SLazyReference<T>? _reference; |
| | | 529 | | internal T? _value; |
| | | 530 | | |
| | | 531 | | /// <inheritdoc /> |
| | | 532 | | public bool IsValueCreated |
| | | 533 | | { |
| | | 534 | | get |
| | | 535 | | { |
| | | 536 | | SLazyReference<T>? reference = _reference; |
| | | 537 | | if (reference is not null) |
| | | 538 | | { |
| | | 539 | | if (reference._func is null) |
| | | 540 | | { |
| | | 541 | | _value = reference._value; |
| | | 542 | | _reference = null; |
| | | 543 | | return true; |
| | | 544 | | } |
| | | 545 | | return false; |
| | | 546 | | } |
| | | 547 | | return true; |
| | | 548 | | } |
| | | 549 | | } |
| | | 550 | | |
| | | 551 | | /// <inheritdoc /> |
| | | 552 | | public T Value |
| | | 553 | | { |
| | | 554 | | get |
| | | 555 | | { |
| | | 556 | | if (_reference is not null) |
| | | 557 | | { |
| | | 558 | | _value = _reference.GetValueNoLockNoCatch(); |
| | | 559 | | _reference = null; |
| | | 560 | | } |
| | | 561 | | return _value!; |
| | | 562 | | } |
| | | 563 | | } |
| | | 564 | | |
| | | 565 | | /// <inheritdoc /> |
| | | 566 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.None; |
| | | 567 | | |
| | | 568 | | /// <inheritdoc /> |
| | | 569 | | public bool IsCachingExceptions => false; |
| | | 570 | | |
| | | 571 | | /// <inheritdoc /> |
| | | 572 | | public bool IsStructCopySafe => true; |
| | | 573 | | |
| | | 574 | | /// <summary>Constructs a new <see cref="SLazyNoLockNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 575 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 576 | | public SLazyNoLockNoCatch(T value) |
| | | 577 | | { |
| | | 578 | | _reference = null; |
| | | 579 | | _value = value; |
| | | 580 | | } |
| | | 581 | | |
| | | 582 | | /// <summary>Constructs a new <see cref="SLazyNoLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 583 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 584 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 585 | | public SLazyNoLockNoCatch(Func<T> func) |
| | | 586 | | { |
| | | 587 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 588 | | _value = default; |
| | | 589 | | _reference = new(func); |
| | | 590 | | } |
| | | 591 | | |
| | | 592 | | /// <summary>Constructs a new <see cref="SLazyNoLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 593 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 594 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 595 | | public static implicit operator SLazyNoLockNoCatch<T>(Func<T> func) => new(func); |
| | | 596 | | |
| | | 597 | | /// <summary>Constructs a new <see cref="SLazyNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 598 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 599 | | public static implicit operator SLazyNoLockNoCatch<T>(T value) => new(value); |
| | | 600 | | |
| | | 601 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 602 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 603 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 604 | | public override bool Equals(object? obj) |
| | | 605 | | { |
| | | 606 | | if (obj is SLazyNoLockNoCatch<T> slazy) |
| | | 607 | | { |
| | | 608 | | obj = slazy.Value; |
| | | 609 | | } |
| | | 610 | | return (Value, obj) switch |
| | | 611 | | { |
| | | 612 | | (null, null) => true, |
| | | 613 | | (_, null) => false, |
| | | 614 | | (null, _) => false, |
| | | 615 | | _ => Value!.Equals(obj), |
| | | 616 | | }; |
| | | 617 | | } |
| | | 618 | | |
| | | 619 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 620 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 621 | | public override string? ToString() => Value?.ToString(); |
| | | 622 | | |
| | | 623 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 624 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 625 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 626 | | |
| | | 627 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 628 | | /// <param name="left">The first value of the equality check.</param> |
| | | 629 | | /// <param name="right">The second value of the equality check.</param> |
| | | 630 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 631 | | public static bool operator ==(SLazyNoLockNoCatch<T> left, SLazyNoLockNoCatch<T> right) => left.Equals(right); |
| | | 632 | | |
| | | 633 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 634 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 635 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 636 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 637 | | public static bool operator !=(SLazyNoLockNoCatch<T> left, SLazyNoLockNoCatch<T> right) => !(left == right); |
| | | 638 | | } |
| | | 639 | | |
| | | 640 | | #endregion |
| | | 641 | | |
| | | 642 | | #region SLazyPublicationLock<T> |
| | | 643 | | |
| | | 644 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 645 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 646 | | public struct SLazyPublicationLock<T> : ILazy<T> |
| | | 647 | | { |
| | | 648 | | internal SLazyReference<T>? _reference; |
| | | 649 | | internal T? _value; |
| | | 650 | | |
| | | 651 | | /// <inheritdoc /> |
| | | 652 | | public bool IsValueCreated |
| | | 653 | | { |
| | | 654 | | get |
| | | 655 | | { |
| | | 656 | | SLazyReference<T>? reference = _reference; |
| | | 657 | | if (reference is not null) |
| | | 658 | | { |
| | | 659 | | if (reference._func is null) |
| | | 660 | | { |
| | | 661 | | _value = reference._value; |
| | | 662 | | _reference = null; |
| | | 663 | | return true; |
| | | 664 | | } |
| | | 665 | | return false; |
| | | 666 | | } |
| | | 667 | | return true; |
| | | 668 | | } |
| | | 669 | | } |
| | | 670 | | |
| | | 671 | | /// <inheritdoc /> |
| | | 672 | | public T Value |
| | | 673 | | { |
| | | 674 | | get |
| | | 675 | | { |
| | | 676 | | if (_reference is not null) |
| | | 677 | | { |
| | | 678 | | _value = _reference.GetValuePublicationLock(); |
| | | 679 | | _reference = null; |
| | | 680 | | } |
| | | 681 | | return _value!; |
| | | 682 | | } |
| | | 683 | | } |
| | | 684 | | |
| | | 685 | | /// <inheritdoc /> |
| | | 686 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.PublicationOnly; |
| | | 687 | | |
| | | 688 | | /// <inheritdoc /> |
| | | 689 | | public bool IsCachingExceptions => true; |
| | | 690 | | |
| | | 691 | | /// <inheritdoc /> |
| | | 692 | | public bool IsStructCopySafe => true; |
| | | 693 | | |
| | | 694 | | /// <summary>Constructs a new <see cref="SLazyPublicationLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 695 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 696 | | public SLazyPublicationLock(T value) |
| | | 697 | | { |
| | | 698 | | _reference = null; |
| | | 699 | | _value = value; |
| | | 700 | | } |
| | | 701 | | |
| | | 702 | | /// <summary>Constructs a new <see cref="SLazyPublicationLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 703 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 704 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 705 | | public SLazyPublicationLock(Func<T> func) |
| | | 706 | | { |
| | | 707 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 708 | | _value = default; |
| | | 709 | | _reference = new(func); |
| | | 710 | | } |
| | | 711 | | |
| | | 712 | | /// <summary>Constructs a new <see cref="SLazyPublicationLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 713 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 714 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 715 | | public static implicit operator SLazyPublicationLock<T>(Func<T> func) => new(func); |
| | | 716 | | |
| | | 717 | | /// <summary>Constructs a new <see cref="SLazyPublicationLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 718 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 719 | | public static implicit operator SLazyPublicationLock<T>(T value) => new(value); |
| | | 720 | | |
| | | 721 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 722 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 723 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 724 | | public override bool Equals(object? obj) |
| | | 725 | | { |
| | | 726 | | if (obj is SLazyPublicationLock<T> slazy) |
| | | 727 | | { |
| | | 728 | | obj = slazy.Value; |
| | | 729 | | } |
| | | 730 | | return (Value, obj) switch |
| | | 731 | | { |
| | | 732 | | (null, null) => true, |
| | | 733 | | (_, null) => false, |
| | | 734 | | (null, _) => false, |
| | | 735 | | _ => Value!.Equals(obj), |
| | | 736 | | }; |
| | | 737 | | } |
| | | 738 | | |
| | | 739 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 740 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 741 | | public override string? ToString() => Value?.ToString(); |
| | | 742 | | |
| | | 743 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 744 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 745 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 746 | | |
| | | 747 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 748 | | /// <param name="left">The first value of the equality check.</param> |
| | | 749 | | /// <param name="right">The second value of the equality check.</param> |
| | | 750 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 751 | | public static bool operator ==(SLazyPublicationLock<T> left, SLazyPublicationLock<T> right) => left.Equals(right); |
| | | 752 | | |
| | | 753 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 754 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 755 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 756 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 757 | | public static bool operator !=(SLazyPublicationLock<T> left, SLazyPublicationLock<T> right) => !(left == right); |
| | | 758 | | } |
| | | 759 | | |
| | | 760 | | #endregion |
| | | 761 | | |
| | | 762 | | #region SLazyPublicationLockNoCatch<T> |
| | | 763 | | |
| | | 764 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 765 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 766 | | public struct SLazyPublicationLockNoCatch<T> : ILazy<T> |
| | | 767 | | { |
| | | 768 | | internal SLazyReference<T>? _reference; |
| | | 769 | | internal T? _value; |
| | | 770 | | |
| | | 771 | | /// <inheritdoc /> |
| | | 772 | | public bool IsValueCreated |
| | | 773 | | { |
| | | 774 | | get |
| | | 775 | | { |
| | | 776 | | SLazyReference<T>? reference = _reference; |
| | | 777 | | if (reference is not null) |
| | | 778 | | { |
| | | 779 | | if (reference._func is null) |
| | | 780 | | { |
| | | 781 | | _value = reference._value; |
| | | 782 | | _reference = null; |
| | | 783 | | return true; |
| | | 784 | | } |
| | | 785 | | return false; |
| | | 786 | | } |
| | | 787 | | return true; |
| | | 788 | | } |
| | | 789 | | } |
| | | 790 | | |
| | | 791 | | /// <inheritdoc /> |
| | | 792 | | public T Value |
| | | 793 | | { |
| | | 794 | | get |
| | | 795 | | { |
| | | 796 | | if (_reference is not null) |
| | | 797 | | { |
| | | 798 | | _value = _reference.GetValuePublicationLockNoCatch(); |
| | | 799 | | _reference = null; |
| | | 800 | | } |
| | | 801 | | return _value!; |
| | | 802 | | } |
| | | 803 | | } |
| | | 804 | | |
| | | 805 | | /// <inheritdoc /> |
| | | 806 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.PublicationOnly; |
| | | 807 | | |
| | | 808 | | /// <inheritdoc /> |
| | | 809 | | public bool IsCachingExceptions => false; |
| | | 810 | | |
| | | 811 | | /// <inheritdoc /> |
| | | 812 | | public bool IsStructCopySafe => true; |
| | | 813 | | |
| | | 814 | | /// <summary>Constructs a new <see cref="SLazyPublicationLockNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 815 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 816 | | public SLazyPublicationLockNoCatch(T value) |
| | | 817 | | { |
| | | 818 | | _reference = null; |
| | | 819 | | _value = value; |
| | | 820 | | } |
| | | 821 | | |
| | | 822 | | /// <summary>Constructs a new <see cref="SLazyPublicationLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 823 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 824 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 825 | | public SLazyPublicationLockNoCatch(Func<T> func) |
| | | 826 | | { |
| | | 827 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 828 | | _value = default; |
| | | 829 | | _reference = new(func); |
| | | 830 | | } |
| | | 831 | | |
| | | 832 | | /// <summary>Constructs a new <see cref="SLazyPublicationLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 833 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 834 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 835 | | public static implicit operator SLazyPublicationLockNoCatch<T>(Func<T> func) => new(func); |
| | | 836 | | |
| | | 837 | | /// <summary>Constructs a new <see cref="SLazyNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 838 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 839 | | public static implicit operator SLazyPublicationLockNoCatch<T>(T value) => new(value); |
| | | 840 | | |
| | | 841 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 842 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 843 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 844 | | public override bool Equals(object? obj) |
| | | 845 | | { |
| | | 846 | | if (obj is SLazyPublicationLockNoCatch<T> slazy) |
| | | 847 | | { |
| | | 848 | | obj = slazy.Value; |
| | | 849 | | } |
| | | 850 | | return (Value, obj) switch |
| | | 851 | | { |
| | | 852 | | (null, null) => true, |
| | | 853 | | (_, null) => false, |
| | | 854 | | (null, _) => false, |
| | | 855 | | _ => Value!.Equals(obj), |
| | | 856 | | }; |
| | | 857 | | } |
| | | 858 | | |
| | | 859 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 860 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 861 | | public override string? ToString() => Value?.ToString(); |
| | | 862 | | |
| | | 863 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 864 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 865 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 866 | | |
| | | 867 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 868 | | /// <param name="left">The first value of the equality check.</param> |
| | | 869 | | /// <param name="right">The second value of the equality check.</param> |
| | | 870 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 871 | | public static bool operator ==(SLazyPublicationLockNoCatch<T> left, SLazyPublicationLockNoCatch<T> right) => left.Equa |
| | | 872 | | |
| | | 873 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 874 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 875 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 876 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 877 | | public static bool operator !=(SLazyPublicationLockNoCatch<T> left, SLazyPublicationLockNoCatch<T> right) => !(left == |
| | | 878 | | } |
| | | 879 | | |
| | | 880 | | #endregion |
| | | 881 | | |
| | | 882 | | #region ValueLazy<T> |
| | | 883 | | |
| | | 884 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 885 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 886 | | public struct ValueLazy<T> : ILazy<T> |
| | | 887 | | { |
| | | 888 | | internal Func<T>? _func; |
| | | 889 | | internal T? _value; |
| | | 890 | | |
| | | 891 | | /// <inheritdoc /> |
| | | 892 | | public bool IsValueCreated => _func is null; |
| | | 893 | | |
| | | 894 | | /// <inheritdoc /> |
| | | 895 | | public T Value => _func is null ? _value! : GetValueSafe(); |
| | | 896 | | |
| | | 897 | | /// <inheritdoc /> |
| | | 898 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.ExecutionAndPublication; |
| | | 899 | | |
| | | 900 | | /// <inheritdoc /> |
| | | 901 | | public bool IsCachingExceptions => true; |
| | | 902 | | |
| | | 903 | | /// <inheritdoc /> |
| | | 904 | | public bool IsStructCopySafe => false; |
| | | 905 | | |
| | | 906 | | internal T GetValueSafe() |
| | | 907 | | { |
| | | 908 | | Func<T>? func = _func; |
| | | 909 | | if (func is not null) |
| | | 910 | | { |
| | | 911 | | lock (func) |
| | | 912 | | { |
| | | 913 | | if (_func is not null) |
| | | 914 | | { |
| | | 915 | | try |
| | | 916 | | { |
| | | 917 | | _value = _func(); |
| | | 918 | | _func = null; |
| | | 919 | | } |
| | | 920 | | catch (Exception exception) |
| | | 921 | | { |
| | | 922 | | _func = () => throw exception; |
| | | 923 | | throw; |
| | | 924 | | } |
| | | 925 | | } |
| | | 926 | | } |
| | | 927 | | } |
| | | 928 | | return _value!; |
| | | 929 | | } |
| | | 930 | | |
| | | 931 | | /// <summary>Constructs a new <see cref="ValueLazy{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 932 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 933 | | public ValueLazy(T value) |
| | | 934 | | { |
| | | 935 | | _func = null; |
| | | 936 | | _value = value; |
| | | 937 | | } |
| | | 938 | | |
| | | 939 | | /// <summary>Constructs a new <see cref="ValueLazy{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 940 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 941 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 942 | | public ValueLazy(Func<T> func) |
| | | 943 | | { |
| | | 944 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 945 | | _value = default; |
| | | 946 | | _func = func; |
| | | 947 | | } |
| | | 948 | | |
| | | 949 | | /// <summary>Constructs a new <see cref="ValueLazy{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 950 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 951 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 952 | | public static implicit operator ValueLazy<T>(Func<T> func) => new(func); |
| | | 953 | | |
| | | 954 | | /// <summary>Constructs a new <see cref="ValueLazy{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 955 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 956 | | public static implicit operator ValueLazy<T>(T value) => new(value); |
| | | 957 | | |
| | | 958 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 959 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 960 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 961 | | public override bool Equals(object? obj) |
| | | 962 | | { |
| | | 963 | | if (obj is ValueLazy<T> slazy) |
| | | 964 | | { |
| | | 965 | | obj = slazy.Value; |
| | | 966 | | } |
| | | 967 | | return (Value, obj) switch |
| | | 968 | | { |
| | | 969 | | (null, null) => true, |
| | | 970 | | (_, null) => false, |
| | | 971 | | (null, _) => false, |
| | | 972 | | _ => Value!.Equals(obj), |
| | | 973 | | }; |
| | | 974 | | } |
| | | 975 | | |
| | | 976 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 977 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 978 | | public override string? ToString() => Value?.ToString(); |
| | | 979 | | |
| | | 980 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 981 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 982 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 983 | | |
| | | 984 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 985 | | /// <param name="left">The first value of the equality check.</param> |
| | | 986 | | /// <param name="right">The second value of the equality check.</param> |
| | | 987 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 988 | | public static bool operator ==(ValueLazy<T> left, ValueLazy<T> right) => left.Equals(right); |
| | | 989 | | |
| | | 990 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 991 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 992 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 993 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 994 | | public static bool operator !=(ValueLazy<T> left, ValueLazy<T> right) => !(left == right); |
| | | 995 | | } |
| | | 996 | | |
| | | 997 | | #endregion |
| | | 998 | | |
| | | 999 | | #region ValueLazyNoCatch<T> |
| | | 1000 | | |
| | | 1001 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 1002 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 1003 | | public struct ValueLazyNoCatch<T> : ILazy<T> |
| | | 1004 | | { |
| | | 1005 | | internal Func<T>? _func; |
| | | 1006 | | internal T? _value; |
| | | 1007 | | |
| | | 1008 | | /// <inheritdoc /> |
| | | 1009 | | public bool IsValueCreated => _func is null; |
| | | 1010 | | |
| | | 1011 | | /// <inheritdoc /> |
| | | 1012 | | public T Value => _func is null ? _value! : GetValueNoCatch(); |
| | | 1013 | | |
| | | 1014 | | /// <inheritdoc /> |
| | | 1015 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.ExecutionAndPublication; |
| | | 1016 | | |
| | | 1017 | | /// <inheritdoc /> |
| | | 1018 | | public bool IsCachingExceptions => false; |
| | | 1019 | | |
| | | 1020 | | /// <inheritdoc /> |
| | | 1021 | | public bool IsStructCopySafe => false; |
| | | 1022 | | |
| | | 1023 | | internal T GetValueNoCatch() |
| | | 1024 | | { |
| | | 1025 | | Func<T>? func = _func; |
| | | 1026 | | if (func is not null) |
| | | 1027 | | { |
| | | 1028 | | lock (func) |
| | | 1029 | | { |
| | | 1030 | | if (_func is not null) |
| | | 1031 | | { |
| | | 1032 | | _value = _func(); |
| | | 1033 | | _func = null; |
| | | 1034 | | } |
| | | 1035 | | } |
| | | 1036 | | } |
| | | 1037 | | return _value!; |
| | | 1038 | | } |
| | | 1039 | | |
| | | 1040 | | /// <summary>Constructs a new <see cref="ValueLazyNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1041 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1042 | | public ValueLazyNoCatch(T value) |
| | | 1043 | | { |
| | | 1044 | | _func = null; |
| | | 1045 | | _value = value; |
| | | 1046 | | } |
| | | 1047 | | |
| | | 1048 | | /// <summary>Constructs a new <see cref="ValueLazyNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1049 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1050 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1051 | | public ValueLazyNoCatch(Func<T> func) |
| | | 1052 | | { |
| | | 1053 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 1054 | | _value = default; |
| | | 1055 | | _func = func; |
| | | 1056 | | } |
| | | 1057 | | |
| | | 1058 | | /// <summary>Constructs a new <see cref="ValueLazyNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1059 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1060 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1061 | | public static implicit operator ValueLazyNoCatch<T>(Func<T> func) => new(func); |
| | | 1062 | | |
| | | 1063 | | /// <summary>Constructs a new <see cref="ValueLazyNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1064 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1065 | | public static implicit operator ValueLazyNoCatch<T>(T value) => new(value); |
| | | 1066 | | |
| | | 1067 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 1068 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 1069 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 1070 | | public override bool Equals(object? obj) |
| | | 1071 | | { |
| | | 1072 | | if (obj is ValueLazyNoCatch<T> slazy) |
| | | 1073 | | { |
| | | 1074 | | obj = slazy.Value; |
| | | 1075 | | } |
| | | 1076 | | return (Value, obj) switch |
| | | 1077 | | { |
| | | 1078 | | (null, null) => true, |
| | | 1079 | | (_, null) => false, |
| | | 1080 | | (null, _) => false, |
| | | 1081 | | _ => Value!.Equals(obj), |
| | | 1082 | | }; |
| | | 1083 | | } |
| | | 1084 | | |
| | | 1085 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 1086 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 1087 | | public override string? ToString() => Value?.ToString(); |
| | | 1088 | | |
| | | 1089 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 1090 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 1091 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 1092 | | |
| | | 1093 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1094 | | /// <param name="left">The first value of the equality check.</param> |
| | | 1095 | | /// <param name="right">The second value of the equality check.</param> |
| | | 1096 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 1097 | | public static bool operator ==(ValueLazyNoCatch<T> left, ValueLazyNoCatch<T> right) => left.Equals(right); |
| | | 1098 | | |
| | | 1099 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1100 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 1101 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 1102 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 1103 | | public static bool operator !=(ValueLazyNoCatch<T> left, ValueLazyNoCatch<T> right) => !(left == right); |
| | | 1104 | | } |
| | | 1105 | | |
| | | 1106 | | #endregion |
| | | 1107 | | |
| | | 1108 | | #region ValueLazyNoLock<T> |
| | | 1109 | | |
| | | 1110 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 1111 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 1112 | | public struct ValueLazyNoLock<T> : ILazy<T> |
| | | 1113 | | { |
| | | 1114 | | internal Func<T>? _func; |
| | | 1115 | | internal T? _value; |
| | | 1116 | | |
| | | 1117 | | /// <inheritdoc /> |
| | | 1118 | | public bool IsValueCreated => _func is null; |
| | | 1119 | | |
| | | 1120 | | /// <inheritdoc /> |
| | | 1121 | | public T Value => _func is null ? _value! : GetValueNoLock(); |
| | | 1122 | | |
| | | 1123 | | /// <inheritdoc /> |
| | | 1124 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.None; |
| | | 1125 | | |
| | | 1126 | | /// <inheritdoc /> |
| | | 1127 | | public bool IsCachingExceptions => true; |
| | | 1128 | | |
| | | 1129 | | /// <inheritdoc /> |
| | | 1130 | | public bool IsStructCopySafe => false; |
| | | 1131 | | |
| | | 1132 | | internal T GetValueNoLock() |
| | | 1133 | | { |
| | | 1134 | | if (_func is not null) |
| | | 1135 | | { |
| | | 1136 | | try |
| | | 1137 | | { |
| | | 1138 | | _value = _func(); |
| | | 1139 | | _func = null; |
| | | 1140 | | } |
| | | 1141 | | catch (Exception exception) |
| | | 1142 | | { |
| | | 1143 | | _func = () => throw exception; |
| | | 1144 | | throw; |
| | | 1145 | | } |
| | | 1146 | | } |
| | | 1147 | | return _value!; |
| | | 1148 | | } |
| | | 1149 | | |
| | | 1150 | | /// <summary>Constructs a new <see cref="ValueLazyNoLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1151 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1152 | | public ValueLazyNoLock(T value) |
| | | 1153 | | { |
| | | 1154 | | _func = null; |
| | | 1155 | | _value = value; |
| | | 1156 | | } |
| | | 1157 | | |
| | | 1158 | | /// <summary>Constructs a new <see cref="ValueLazyNoLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1159 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1160 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1161 | | public ValueLazyNoLock(Func<T> func) |
| | | 1162 | | { |
| | | 1163 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 1164 | | _value = default; |
| | | 1165 | | _func = func; |
| | | 1166 | | } |
| | | 1167 | | |
| | | 1168 | | /// <summary>Constructs a new <see cref="ValueLazyNoLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1169 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1170 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1171 | | public static implicit operator ValueLazyNoLock<T>(Func<T> func) => new(func); |
| | | 1172 | | |
| | | 1173 | | /// <summary>Constructs a new <see cref="ValueLazyNoLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1174 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1175 | | public static implicit operator ValueLazyNoLock<T>(T value) => new(value); |
| | | 1176 | | |
| | | 1177 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 1178 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 1179 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 1180 | | public override bool Equals(object? obj) |
| | | 1181 | | { |
| | | 1182 | | if (obj is ValueLazyNoLock<T> slazy) |
| | | 1183 | | { |
| | | 1184 | | obj = slazy.Value; |
| | | 1185 | | } |
| | | 1186 | | return (Value, obj) switch |
| | | 1187 | | { |
| | | 1188 | | (null, null) => true, |
| | | 1189 | | (_, null) => false, |
| | | 1190 | | (null, _) => false, |
| | | 1191 | | _ => Value!.Equals(obj), |
| | | 1192 | | }; |
| | | 1193 | | } |
| | | 1194 | | |
| | | 1195 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 1196 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 1197 | | public override string? ToString() => Value?.ToString(); |
| | | 1198 | | |
| | | 1199 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 1200 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 1201 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 1202 | | |
| | | 1203 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1204 | | /// <param name="left">The first value of the equality check.</param> |
| | | 1205 | | /// <param name="right">The second value of the equality check.</param> |
| | | 1206 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 1207 | | public static bool operator ==(ValueLazyNoLock<T> left, ValueLazyNoLock<T> right) => left.Equals(right); |
| | | 1208 | | |
| | | 1209 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1210 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 1211 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 1212 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 1213 | | public static bool operator !=(ValueLazyNoLock<T> left, ValueLazyNoLock<T> right) => !(left == right); |
| | | 1214 | | } |
| | | 1215 | | |
| | | 1216 | | #endregion |
| | | 1217 | | |
| | | 1218 | | #region ValueLazyNoLockNoCatch<T> |
| | | 1219 | | |
| | | 1220 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 1221 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 1222 | | public struct ValueLazyNoLockNoCatch<T> : ILazy<T> |
| | | 1223 | | { |
| | | 1224 | | internal Func<T>? _func; |
| | | 1225 | | internal T? _value; |
| | | 1226 | | |
| | | 1227 | | /// <inheritdoc /> |
| | | 1228 | | public bool IsValueCreated => _func is null; |
| | | 1229 | | |
| | | 1230 | | /// <inheritdoc /> |
| | | 1231 | | public T Value => _func is null ? _value! : GetValueNoLockNoCatch(); |
| | | 1232 | | |
| | | 1233 | | /// <inheritdoc /> |
| | | 1234 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.None; |
| | | 1235 | | |
| | | 1236 | | /// <inheritdoc /> |
| | | 1237 | | public bool IsCachingExceptions => false; |
| | | 1238 | | |
| | | 1239 | | /// <inheritdoc /> |
| | | 1240 | | public bool IsStructCopySafe => false; |
| | | 1241 | | |
| | | 1242 | | internal T GetValueNoLockNoCatch() |
| | | 1243 | | { |
| | | 1244 | | if (_func is not null) |
| | | 1245 | | { |
| | | 1246 | | _value = _func(); |
| | | 1247 | | _func = null; |
| | | 1248 | | } |
| | | 1249 | | return _value!; |
| | | 1250 | | } |
| | | 1251 | | |
| | | 1252 | | /// <summary>Constructs a new <see cref="ValueLazyNoLockNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1253 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1254 | | public ValueLazyNoLockNoCatch(T value) |
| | | 1255 | | { |
| | | 1256 | | _func = null; |
| | | 1257 | | _value = value; |
| | | 1258 | | } |
| | | 1259 | | |
| | | 1260 | | /// <summary>Constructs a new <see cref="ValueLazyNoLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1261 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1262 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1263 | | public ValueLazyNoLockNoCatch(Func<T> func) |
| | | 1264 | | { |
| | | 1265 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 1266 | | _value = default; |
| | | 1267 | | _func = func; |
| | | 1268 | | } |
| | | 1269 | | |
| | | 1270 | | /// <summary>Constructs a new <see cref="ValueLazyNoLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1271 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1272 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1273 | | public static implicit operator ValueLazyNoLockNoCatch<T>(Func<T> func) => new(func); |
| | | 1274 | | |
| | | 1275 | | /// <summary>Constructs a new <see cref="ValueLazyNoLockNoCatch{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1276 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1277 | | public static implicit operator ValueLazyNoLockNoCatch<T>(T value) => new(value); |
| | | 1278 | | |
| | | 1279 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 1280 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 1281 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 1282 | | public override bool Equals(object? obj) |
| | | 1283 | | { |
| | | 1284 | | if (obj is ValueLazyNoLockNoCatch<T> slazy) |
| | | 1285 | | { |
| | | 1286 | | obj = slazy.Value; |
| | | 1287 | | } |
| | | 1288 | | return (Value, obj) switch |
| | | 1289 | | { |
| | | 1290 | | (null, null) => true, |
| | | 1291 | | (_, null) => false, |
| | | 1292 | | (null, _) => false, |
| | | 1293 | | _ => Value!.Equals(obj), |
| | | 1294 | | }; |
| | | 1295 | | } |
| | | 1296 | | |
| | | 1297 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 1298 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 1299 | | public override string? ToString() => Value?.ToString(); |
| | | 1300 | | |
| | | 1301 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 1302 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 1303 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 1304 | | |
| | | 1305 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1306 | | /// <param name="left">The first value of the equality check.</param> |
| | | 1307 | | /// <param name="right">The second value of the equality check.</param> |
| | | 1308 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 1309 | | public static bool operator ==(ValueLazyNoLockNoCatch<T> left, ValueLazyNoLockNoCatch<T> right) => left.Equals(right); |
| | | 1310 | | |
| | | 1311 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1312 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 1313 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 1314 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 1315 | | public static bool operator !=(ValueLazyNoLockNoCatch<T> left, ValueLazyNoLockNoCatch<T> right) => !(left == right); |
| | | 1316 | | } |
| | | 1317 | | |
| | | 1318 | | #endregion |
| | | 1319 | | |
| | | 1320 | | #region ValueLazyPublicationLock<T> |
| | | 1321 | | |
| | | 1322 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 1323 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 1324 | | public struct ValueLazyPublicationLock<T> : ILazy<T> |
| | | 1325 | | { |
| | | 1326 | | internal Func<T>? _func; |
| | | 1327 | | internal T? _value; |
| | | 1328 | | |
| | | 1329 | | /// <inheritdoc /> |
| | | 1330 | | public bool IsValueCreated => _func is null; |
| | | 1331 | | |
| | | 1332 | | /// <inheritdoc /> |
| | | 1333 | | public T Value => _func is null ? _value! : GetValuePublicationLock(); |
| | | 1334 | | |
| | | 1335 | | /// <inheritdoc /> |
| | | 1336 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.PublicationOnly; |
| | | 1337 | | |
| | | 1338 | | /// <inheritdoc /> |
| | | 1339 | | public bool IsCachingExceptions => true; |
| | | 1340 | | |
| | | 1341 | | /// <inheritdoc /> |
| | | 1342 | | public bool IsStructCopySafe => false; |
| | | 1343 | | |
| | | 1344 | | internal T GetValuePublicationLock() |
| | | 1345 | | { |
| | | 1346 | | Func<T>? func = _func; |
| | | 1347 | | if (func is not null) |
| | | 1348 | | { |
| | | 1349 | | try |
| | | 1350 | | { |
| | | 1351 | | T value = func(); |
| | | 1352 | | lock (func) |
| | | 1353 | | { |
| | | 1354 | | if (_func is not null) |
| | | 1355 | | { |
| | | 1356 | | if (ReferenceEquals(_func, func)) |
| | | 1357 | | { |
| | | 1358 | | _value = value; |
| | | 1359 | | _func = null; |
| | | 1360 | | } |
| | | 1361 | | else |
| | | 1362 | | { |
| | | 1363 | | _ = _func(); |
| | | 1364 | | } |
| | | 1365 | | } |
| | | 1366 | | } |
| | | 1367 | | } |
| | | 1368 | | catch (Exception exception) |
| | | 1369 | | { |
| | | 1370 | | lock (func) |
| | | 1371 | | { |
| | | 1372 | | if (_func is not null) |
| | | 1373 | | { |
| | | 1374 | | if (ReferenceEquals(_func, func)) |
| | | 1375 | | { |
| | | 1376 | | _func = () => throw exception; |
| | | 1377 | | throw; |
| | | 1378 | | } |
| | | 1379 | | else |
| | | 1380 | | { |
| | | 1381 | | _ = _func(); |
| | | 1382 | | } |
| | | 1383 | | } |
| | | 1384 | | } |
| | | 1385 | | } |
| | | 1386 | | } |
| | | 1387 | | return _value!; |
| | | 1388 | | } |
| | | 1389 | | |
| | | 1390 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1391 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1392 | | public ValueLazyPublicationLock(T value) |
| | | 1393 | | { |
| | | 1394 | | _func = null; |
| | | 1395 | | _value = value; |
| | | 1396 | | } |
| | | 1397 | | |
| | | 1398 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1399 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1400 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1401 | | public ValueLazyPublicationLock(Func<T> func) |
| | | 1402 | | { |
| | | 1403 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | | 1404 | | _value = default; |
| | | 1405 | | _func = func; |
| | | 1406 | | } |
| | | 1407 | | |
| | | 1408 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLock{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1409 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1410 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1411 | | public static implicit operator ValueLazyPublicationLock<T>(Func<T> func) => new(func); |
| | | 1412 | | |
| | | 1413 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLock{T}"/> from a <typeparamref name="T"/>.</summary> |
| | | 1414 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1415 | | public static implicit operator ValueLazyPublicationLock<T>(T value) => new(value); |
| | | 1416 | | |
| | | 1417 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 1418 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 1419 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 1420 | | public override bool Equals(object? obj) |
| | | 1421 | | { |
| | | 1422 | | if (obj is ValueLazyPublicationLock<T> slazy) |
| | | 1423 | | { |
| | | 1424 | | obj = slazy.Value; |
| | | 1425 | | } |
| | | 1426 | | return (Value, obj) switch |
| | | 1427 | | { |
| | | 1428 | | (null, null) => true, |
| | | 1429 | | (_, null) => false, |
| | | 1430 | | (null, _) => false, |
| | | 1431 | | _ => Value!.Equals(obj), |
| | | 1432 | | }; |
| | | 1433 | | } |
| | | 1434 | | |
| | | 1435 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 1436 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | | 1437 | | public override string? ToString() => Value?.ToString(); |
| | | 1438 | | |
| | | 1439 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 1440 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | | 1441 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 1442 | | |
| | | 1443 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1444 | | /// <param name="left">The first value of the equality check.</param> |
| | | 1445 | | /// <param name="right">The second value of the equality check.</param> |
| | | 1446 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | | 1447 | | public static bool operator ==(ValueLazyPublicationLock<T> left, ValueLazyPublicationLock<T> right) => left.Equals(rig |
| | | 1448 | | |
| | | 1449 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1450 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 1451 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 1452 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | | 1453 | | public static bool operator !=(ValueLazyPublicationLock<T> left, ValueLazyPublicationLock<T> right) => !(left == right |
| | | 1454 | | } |
| | | 1455 | | |
| | | 1456 | | #endregion |
| | | 1457 | | |
| | | 1458 | | #region ValueLazyPublicationLockNoCatch<T> |
| | | 1459 | | |
| | | 1460 | | /// <summary>Provides support for lazy initialization.</summary> |
| | | 1461 | | /// <typeparam name="T">The type of value that is being lazily initialized.</typeparam> |
| | | 1462 | | public struct ValueLazyPublicationLockNoCatch<T> : ILazy<T> |
| | | 1463 | | { |
| | | 1464 | | internal Func<T>? _func; |
| | | 1465 | | internal T? _value; |
| | | 1466 | | |
| | | 1467 | | /// <inheritdoc /> |
| | 6 | 1468 | | public bool IsValueCreated => _func is null; |
| | | 1469 | | |
| | | 1470 | | /// <inheritdoc /> |
| | 49 | 1471 | | public T Value => _func is null ? _value! : GetValuePublicationLockNoCatch(); |
| | | 1472 | | |
| | | 1473 | | /// <inheritdoc /> |
| | 2 | 1474 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.PublicationOnly; |
| | | 1475 | | |
| | | 1476 | | /// <inheritdoc /> |
| | 1 | 1477 | | public bool IsCachingExceptions => false; |
| | | 1478 | | |
| | | 1479 | | /// <inheritdoc /> |
| | 1 | 1480 | | public bool IsStructCopySafe => false; |
| | | 1481 | | |
| | | 1482 | | internal T GetValuePublicationLockNoCatch() |
| | 20 | 1483 | | { |
| | | 1484 | | |
| | 20 | 1485 | | Func<T>? func = _func; |
| | 20 | 1486 | | if (func is not null) |
| | 20 | 1487 | | { |
| | 20 | 1488 | | T value = func(); |
| | 16 | 1489 | | lock (func) |
| | 16 | 1490 | | { |
| | 16 | 1491 | | if (_func is not null) |
| | 15 | 1492 | | { |
| | 15 | 1493 | | _value = value; |
| | 15 | 1494 | | _func = null; |
| | 15 | 1495 | | } |
| | 16 | 1496 | | } |
| | 16 | 1497 | | } |
| | 16 | 1498 | | return _value!; |
| | 16 | 1499 | | } |
| | | 1500 | | |
| | | 1501 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLockNoCatch{T}"/> from a <typeparamref name="T"/>.</summa |
| | | 1502 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | | 1503 | | public ValueLazyPublicationLockNoCatch(T value) |
| | 16 | 1504 | | { |
| | 16 | 1505 | | _func = null; |
| | 16 | 1506 | | _value = value; |
| | 16 | 1507 | | } |
| | | 1508 | | |
| | | 1509 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1510 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1511 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | | 1512 | | public ValueLazyPublicationLockNoCatch(Func<T> func) |
| | 20 | 1513 | | { |
| | 23 | 1514 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | 17 | 1515 | | _value = default; |
| | 17 | 1516 | | _func = func; |
| | 17 | 1517 | | } |
| | | 1518 | | |
| | | 1519 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLockNoCatch{T}"/> from a <see cref="Func{T}"/>.</summary> |
| | | 1520 | | /// <param name="func">The method used to initialize <see cref="Value"/>.</param> |
| | | 1521 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="func"/> is null.</exception> |
| | 20 | 1522 | | public static implicit operator ValueLazyPublicationLockNoCatch<T>(Func<T> func) => new(func); |
| | | 1523 | | |
| | | 1524 | | /// <summary>Constructs a new <see cref="ValueLazyPublicationLockNoCatch{T}"/> from a <typeparamref name="T"/>.</summa |
| | | 1525 | | /// <param name="value">The value to initialize <see cref="Value"/> with.</param> |
| | 16 | 1526 | | public static implicit operator ValueLazyPublicationLockNoCatch<T>(T value) => new(value); |
| | | 1527 | | |
| | | 1528 | | /// <summary>Checks for equality between <see cref="Value"/> and <paramref name="obj"/>.</summary> |
| | | 1529 | | /// <param name="obj">The value to compare to <see cref="Value"/>.</param> |
| | | 1530 | | /// <returns>True if <see cref="Value"/> and <paramref name="obj"/> are equal or False if not.</returns> |
| | | 1531 | | public override bool Equals(object? obj) |
| | 12 | 1532 | | { |
| | 12 | 1533 | | if (obj is ValueLazyPublicationLockNoCatch<T> slazy) |
| | 7 | 1534 | | { |
| | 7 | 1535 | | obj = slazy.Value; |
| | 7 | 1536 | | } |
| | 12 | 1537 | | return (Value, obj) switch |
| | 12 | 1538 | | { |
| | 3 | 1539 | | (null, null) => true, |
| | 1 | 1540 | | (_, null) => false, |
| | 1 | 1541 | | (null, _) => false, |
| | 7 | 1542 | | _ => Value!.Equals(obj), |
| | 12 | 1543 | | }; |
| | 12 | 1544 | | } |
| | | 1545 | | |
| | | 1546 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | | 1547 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | 5 | 1548 | | public override string? ToString() => Value?.ToString(); |
| | | 1549 | | |
| | | 1550 | | /// <summary>Gets the hash code of <see cref="Value"/>.</summary> |
| | | 1551 | | /// <returns>The hash code of <see cref="Value"/>.</returns> |
| | 7 | 1552 | | public override int GetHashCode() => Value?.GetHashCode() ?? default; |
| | | 1553 | | |
| | | 1554 | | /// <summary>Checks for equality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1555 | | /// <param name="left">The first value of the equality check.</param> |
| | | 1556 | | /// <param name="right">The second value of the equality check.</param> |
| | | 1557 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are equal or False if not.</returns> |
| | 2 | 1558 | | public static bool operator ==(ValueLazyPublicationLockNoCatch<T> left, ValueLazyPublicationLockNoCatch<T> right) => l |
| | | 1559 | | |
| | | 1560 | | /// <summary>Checks for inequality between <paramref name="left"/> and <paramref name="right"/>.</summary> |
| | | 1561 | | /// <param name="left">The first value of the inequality check.</param> |
| | | 1562 | | /// <param name="right">The second value of the inequality check.</param> |
| | | 1563 | | /// <returns>True if <paramref name="left"/> and <paramref name="right"/> are not equal or False if not.</returns> |
| | 1 | 1564 | | public static bool operator !=(ValueLazyPublicationLockNoCatch<T> left, ValueLazyPublicationLockNoCatch<T> right) => ! |
| | | 1565 | | } |
| | | 1566 | | |
| | | 1567 | | #endregion |