| | 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 |
| 9 | 775 | | { |
| 9 | 776 | | SLazyReference<T>? reference = _reference; |
| 9 | 777 | | if (reference is not null) |
| 5 | 778 | | { |
| 5 | 779 | | if (reference._func is null) |
| 1 | 780 | | { |
| 1 | 781 | | _value = reference._value; |
| 1 | 782 | | _reference = null; |
| 1 | 783 | | return true; |
| | 784 | | } |
| 4 | 785 | | return false; |
| | 786 | | } |
| 4 | 787 | | return true; |
| 9 | 788 | | } |
| | 789 | | } |
| | 790 | |
|
| | 791 | | /// <inheritdoc /> |
| | 792 | | public T Value |
| | 793 | | { |
| | 794 | | get |
| 73 | 795 | | { |
| 73 | 796 | | if (_reference is not null) |
| 29 | 797 | | { |
| 29 | 798 | | _value = _reference.GetValuePublicationLockNoCatch(); |
| 25 | 799 | | _reference = null; |
| 25 | 800 | | } |
| 69 | 801 | | return _value!; |
| 69 | 802 | | } |
| | 803 | | } |
| | 804 | |
|
| | 805 | | /// <inheritdoc /> |
| 4 | 806 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.PublicationOnly; |
| | 807 | |
|
| | 808 | | /// <inheritdoc /> |
| 1 | 809 | | public bool IsCachingExceptions => false; |
| | 810 | |
|
| | 811 | | /// <inheritdoc /> |
| 1 | 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) |
| 19 | 817 | | { |
| 19 | 818 | | _reference = null; |
| 19 | 819 | | _value = value; |
| 19 | 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) |
| 25 | 826 | | { |
| 28 | 827 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| 22 | 828 | | _value = default; |
| 22 | 829 | | _reference = new(func); |
| 22 | 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> |
| 25 | 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> |
| 19 | 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) |
| 18 | 845 | | { |
| 18 | 846 | | if (obj is SLazyPublicationLockNoCatch<T> slazy) |
| 13 | 847 | | { |
| 13 | 848 | | obj = slazy.Value; |
| 13 | 849 | | } |
| 18 | 850 | | return (Value, obj) switch |
| 18 | 851 | | { |
| 3 | 852 | | (null, null) => true, |
| 1 | 853 | | (_, null) => false, |
| 1 | 854 | | (null, _) => false, |
| 13 | 855 | | _ => Value!.Equals(obj), |
| 18 | 856 | | }; |
| 18 | 857 | | } |
| | 858 | |
|
| | 859 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | 860 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| 5 | 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> |
| 7 | 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> |
| 2 | 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> |
| 1 | 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 /> |
| | 1468 | | public bool IsValueCreated => _func is null; |
| | 1469 | |
|
| | 1470 | | /// <inheritdoc /> |
| | 1471 | | public T Value => _func is null ? _value! : GetValuePublicationLockNoCatch(); |
| | 1472 | |
|
| | 1473 | | /// <inheritdoc /> |
| | 1474 | | public LazyThreadSafetyMode ThreadSafety => LazyThreadSafetyMode.PublicationOnly; |
| | 1475 | |
|
| | 1476 | | /// <inheritdoc /> |
| | 1477 | | public bool IsCachingExceptions => false; |
| | 1478 | |
|
| | 1479 | | /// <inheritdoc /> |
| | 1480 | | public bool IsStructCopySafe => false; |
| | 1481 | |
|
| | 1482 | | internal T GetValuePublicationLockNoCatch() |
| | 1483 | | { |
| | 1484 | |
|
| | 1485 | | Func<T>? func = _func; |
| | 1486 | | if (func is not null) |
| | 1487 | | { |
| | 1488 | | T value = func(); |
| | 1489 | | lock (func) |
| | 1490 | | { |
| | 1491 | | if (_func is not null) |
| | 1492 | | { |
| | 1493 | | _value = value; |
| | 1494 | | _func = null; |
| | 1495 | | } |
| | 1496 | | } |
| | 1497 | | } |
| | 1498 | | return _value!; |
| | 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) |
| | 1504 | | { |
| | 1505 | | _func = null; |
| | 1506 | | _value = value; |
| | 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) |
| | 1513 | | { |
| | 1514 | | if (func is null) throw new ArgumentNullException(nameof(func)); |
| | 1515 | | _value = default; |
| | 1516 | | _func = func; |
| | 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> |
| | 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> |
| | 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) |
| | 1532 | | { |
| | 1533 | | if (obj is ValueLazyPublicationLockNoCatch<T> slazy) |
| | 1534 | | { |
| | 1535 | | obj = slazy.Value; |
| | 1536 | | } |
| | 1537 | | return (Value, obj) switch |
| | 1538 | | { |
| | 1539 | | (null, null) => true, |
| | 1540 | | (_, null) => false, |
| | 1541 | | (null, _) => false, |
| | 1542 | | _ => Value!.Equals(obj), |
| | 1543 | | }; |
| | 1544 | | } |
| | 1545 | |
|
| | 1546 | | /// <summary>Returns a string that represents <see cref="Value"/>.</summary> |
| | 1547 | | /// <returns>A string that represents <see cref="Value"/></returns> |
| | 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> |
| | 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> |
| | 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> |
| | 1564 | | public static bool operator !=(ValueLazyPublicationLockNoCatch<T> left, ValueLazyPublicationLockNoCatch<T> right) => ! |
| | 1565 | | } |
| | 1566 | |
|
| | 1567 | | #endregion |