| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | using System; |
| | | 5 | | using System.Collections.Generic; |
| | | 6 | | using System.Threading; |
| | | 7 | | using System.Threading.Tasks; |
| | | 8 | | using CoreWCF.Runtime; |
| | | 9 | | |
| | | 10 | | namespace CoreWCF.Dispatcher |
| | | 11 | | { |
| | | 12 | | internal class ConcurrencyBehavior |
| | | 13 | | { |
| | | 14 | | private readonly ConcurrencyMode _concurrencyMode; |
| | | 15 | | private readonly bool _enforceOrderedReceive; |
| | | 16 | | |
| | | 17 | | internal ConcurrencyBehavior(DispatchRuntime runtime) |
| | | 18 | | { |
| | | 19 | | _concurrencyMode = runtime.ConcurrencyMode; |
| | | 20 | | _enforceOrderedReceive = runtime.EnsureOrderedDispatch; |
| | | 21 | | //this.supportsTransactedBatch = ConcurrencyBehavior.SupportsTransactedBatch(runtime.ChannelDispatcher); |
| | | 22 | | } |
| | | 23 | | |
| | | 24 | | internal bool IsConcurrent(MessageRpc rpc) |
| | | 25 | | { |
| | | 26 | | return IsConcurrent(_concurrencyMode, _enforceOrderedReceive, rpc.Channel.HasSession/*, this.supportsTransac |
| | | 27 | | } |
| | | 28 | | |
| | | 29 | | internal static bool IsConcurrent(ConcurrencyMode concurrencyMode, bool ensureOrderedDispatch, bool hasSession / |
| | | 30 | | { |
| | | 31 | | //if (supportsTransactedBatch) |
| | | 32 | | //{ |
| | | 33 | | // return false; |
| | | 34 | | //} |
| | | 35 | | |
| | | 36 | | if (concurrencyMode != ConcurrencyMode.Single) |
| | | 37 | | { |
| | | 38 | | return true; |
| | | 39 | | } |
| | | 40 | | |
| | | 41 | | if (hasSession) |
| | | 42 | | { |
| | | 43 | | return false; |
| | | 44 | | } |
| | | 45 | | |
| | | 46 | | if (ensureOrderedDispatch) |
| | | 47 | | { |
| | | 48 | | return false; |
| | | 49 | | } |
| | | 50 | | |
| | | 51 | | return true; |
| | | 52 | | } |
| | | 53 | | |
| | | 54 | | internal static bool IsConcurrent(ChannelDispatcher runtime, bool hasSession) |
| | | 55 | | { |
| | | 56 | | bool isConcurrencyModeSingle = true; |
| | | 57 | | |
| | | 58 | | //if (ConcurrencyBehavior.SupportsTransactedBatch(runtime)) |
| | | 59 | | //{ |
| | | 60 | | // return false; |
| | | 61 | | //} |
| | | 62 | | |
| | | 63 | | foreach (EndpointDispatcher endpointDispatcher in runtime.Endpoints) |
| | | 64 | | { |
| | | 65 | | if (endpointDispatcher.DispatchRuntime.EnsureOrderedDispatch) |
| | | 66 | | { |
| | | 67 | | return false; |
| | | 68 | | } |
| | | 69 | | |
| | | 70 | | if (endpointDispatcher.DispatchRuntime.ConcurrencyMode != ConcurrencyMode.Single) |
| | | 71 | | { |
| | | 72 | | isConcurrencyModeSingle = false; |
| | | 73 | | } |
| | | 74 | | } |
| | | 75 | | |
| | | 76 | | if (!isConcurrencyModeSingle) |
| | | 77 | | { |
| | | 78 | | return true; |
| | | 79 | | } |
| | | 80 | | |
| | | 81 | | if (!hasSession) |
| | | 82 | | { |
| | | 83 | | return true; |
| | | 84 | | } |
| | | 85 | | |
| | | 86 | | return false; |
| | | 87 | | } |
| | | 88 | | |
| | | 89 | | internal async Task LockInstanceAsync(MessageRpc rpc) |
| | | 90 | | { |
| | | 91 | | if (_concurrencyMode != ConcurrencyMode.Multiple) |
| | | 92 | | { |
| | | 93 | | ConcurrencyInstanceContextFacet resource = rpc.InstanceContext.Concurrency; |
| | | 94 | | Task waiter = null; |
| | | 95 | | lock (rpc.InstanceContext.ThisLock) |
| | | 96 | | { |
| | | 97 | | if (!resource.Locked) |
| | | 98 | | { |
| | | 99 | | resource.Locked = true; |
| | | 100 | | } |
| | | 101 | | else |
| | | 102 | | { |
| | | 103 | | waiter = resource.EnqueueNewMessage(); |
| | | 104 | | } |
| | | 105 | | } |
| | | 106 | | |
| | | 107 | | if (waiter != null) |
| | | 108 | | { |
| | | 109 | | await waiter; |
| | | 110 | | } |
| | | 111 | | |
| | | 112 | | // TODO: Throw this on setup |
| | | 113 | | if (_concurrencyMode == ConcurrencyMode.Reentrant) |
| | | 114 | | { |
| | | 115 | | throw new NotSupportedException(nameof(ConcurrencyMode.Reentrant)); |
| | | 116 | | } |
| | | 117 | | } |
| | | 118 | | } |
| | | 119 | | |
| | | 120 | | internal void UnlockInstance(ref MessageRpc rpc) |
| | | 121 | | { |
| | | 122 | | if (_concurrencyMode != ConcurrencyMode.Multiple) |
| | | 123 | | { |
| | | 124 | | UnlockInstance(rpc.InstanceContext); |
| | | 125 | | } |
| | | 126 | | } |
| | | 127 | | |
| | | 128 | | internal static void UnlockInstanceBeforeCallout(OperationContext operationContext) |
| | | 129 | | { |
| | | 130 | | if (operationContext != null && operationContext.IsServiceReentrant) |
| | | 131 | | { |
| | | 132 | | UnlockInstance(operationContext.InstanceContext); |
| | | 133 | | } |
| | | 134 | | } |
| | | 135 | | |
| | | 136 | | private static void UnlockInstance(InstanceContext instanceContext) |
| | | 137 | | { |
| | | 138 | | ConcurrencyInstanceContextFacet resource = instanceContext.Concurrency; |
| | | 139 | | |
| | | 140 | | lock (instanceContext.ThisLock) |
| | | 141 | | { |
| | | 142 | | if (resource.HasWaiters) |
| | | 143 | | { |
| | | 144 | | resource.DequeueWaiter(); |
| | | 145 | | } |
| | | 146 | | else |
| | | 147 | | { |
| | | 148 | | //We have no pending Callouts and no new Messages to process |
| | | 149 | | resource.Locked = false; |
| | | 150 | | } |
| | | 151 | | } |
| | | 152 | | } |
| | | 153 | | |
| | | 154 | | // TODO: Make async to remove blocking Wait call |
| | | 155 | | internal static Task LockInstanceAfterCalloutAsync(OperationContext operationContext) |
| | | 156 | | { |
| | | 157 | | if (operationContext != null) |
| | | 158 | | { |
| | | 159 | | InstanceContext instanceContext = operationContext.InstanceContext; |
| | | 160 | | |
| | | 161 | | if (operationContext.IsServiceReentrant) |
| | | 162 | | { |
| | | 163 | | ConcurrencyInstanceContextFacet resource = instanceContext.Concurrency; |
| | | 164 | | bool needToWait = false; |
| | | 165 | | lock (instanceContext.ThisLock) |
| | | 166 | | { |
| | | 167 | | if (!resource.Locked) |
| | | 168 | | { |
| | | 169 | | resource.Locked = true; |
| | | 170 | | } |
| | | 171 | | } |
| | | 172 | | |
| | | 173 | | if (needToWait) |
| | | 174 | | { |
| | | 175 | | return resource.EnqueueCalloutMessage(); |
| | | 176 | | } |
| | | 177 | | } |
| | | 178 | | } |
| | | 179 | | |
| | | 180 | | return Task.CompletedTask; |
| | | 181 | | } |
| | | 182 | | |
| | | 183 | | internal interface IWaiter |
| | | 184 | | { |
| | | 185 | | void Signal(); |
| | | 186 | | } |
| | | 187 | | |
| | | 188 | | private class MessageRpcWaiter : IWaiter |
| | | 189 | | { |
| | | 190 | | private readonly IResumeMessageRpc _resume; |
| | | 191 | | |
| | | 192 | | internal MessageRpcWaiter(IResumeMessageRpc resume) |
| | | 193 | | { |
| | | 194 | | _resume = resume; |
| | | 195 | | } |
| | | 196 | | |
| | | 197 | | void IWaiter.Signal() |
| | | 198 | | { |
| | | 199 | | try |
| | | 200 | | { |
| | | 201 | | _resume.Resume(out bool alreadyResumedNoLock); |
| | | 202 | | |
| | | 203 | | if (alreadyResumedNoLock) |
| | | 204 | | { |
| | | 205 | | Fx.Assert("ConcurrencyBehavior resumed more than once for same call."); |
| | | 206 | | } |
| | | 207 | | } |
| | | 208 | | catch (Exception e) |
| | | 209 | | { |
| | | 210 | | if (Fx.IsFatal(e)) |
| | | 211 | | { |
| | | 212 | | throw; |
| | | 213 | | } |
| | | 214 | | throw DiagnosticUtility.ExceptionUtility.ThrowHelperCallback(e); |
| | | 215 | | } |
| | | 216 | | } |
| | | 217 | | } |
| | | 218 | | |
| | | 219 | | private class ThreadWaiter : IWaiter |
| | | 220 | | { |
| | | 221 | | private readonly ManualResetEvent _wait = new ManualResetEvent(false); |
| | | 222 | | |
| | | 223 | | void IWaiter.Signal() |
| | | 224 | | { |
| | | 225 | | _wait.Set(); |
| | | 226 | | } |
| | | 227 | | |
| | | 228 | | internal void Wait() |
| | | 229 | | { |
| | | 230 | | _wait.WaitOne(); |
| | | 231 | | _wait.Dispose(); |
| | | 232 | | } |
| | | 233 | | } |
| | | 234 | | } |
| | | 235 | | |
| | | 236 | | internal class ConcurrencyInstanceContextFacet |
| | | 237 | | { |
| | | 238 | | internal bool Locked; |
| | | 239 | | private Queue<TaskCompletionSource<object>> _calloutMessageQueue; |
| | | 240 | | private Queue<TaskCompletionSource<object>> _newMessageQueue; |
| | | 241 | | |
| | | 242 | | internal bool HasWaiters |
| | | 243 | | { |
| | | 244 | | get |
| | | 245 | | { |
| | 2327 | 246 | | return (((_calloutMessageQueue != null) && (_calloutMessageQueue.Count > 0)) || |
| | 2327 | 247 | | ((_newMessageQueue != null) && (_newMessageQueue.Count > 0))); |
| | | 248 | | } |
| | | 249 | | } |
| | | 250 | | |
| | | 251 | | private TaskCompletionSource<object> DequeueFrom(Queue<TaskCompletionSource<object>> queue) |
| | | 252 | | { |
| | 0 | 253 | | TaskCompletionSource<object> waiter = queue.Dequeue(); |
| | | 254 | | |
| | 0 | 255 | | if (queue.Count == 0) |
| | | 256 | | { |
| | 0 | 257 | | queue.TrimExcess(); |
| | | 258 | | } |
| | | 259 | | |
| | 0 | 260 | | return waiter; |
| | | 261 | | } |
| | | 262 | | |
| | | 263 | | internal void DequeueWaiter() |
| | | 264 | | { |
| | | 265 | | TaskCompletionSource<object> waiter; |
| | 0 | 266 | | if ((_calloutMessageQueue != null) && (_calloutMessageQueue.Count > 0)) |
| | | 267 | | { |
| | 0 | 268 | | waiter = DequeueFrom(_calloutMessageQueue); |
| | | 269 | | } |
| | | 270 | | else |
| | | 271 | | { |
| | 0 | 272 | | waiter = DequeueFrom(_newMessageQueue); |
| | | 273 | | } |
| | | 274 | | |
| | 0 | 275 | | waiter.TrySetResult(null); |
| | 0 | 276 | | } |
| | | 277 | | |
| | | 278 | | internal Task EnqueueNewMessage() |
| | | 279 | | { |
| | 0 | 280 | | if (_newMessageQueue == null) |
| | | 281 | | { |
| | 0 | 282 | | _newMessageQueue = new Queue<TaskCompletionSource<object>>(); |
| | | 283 | | } |
| | | 284 | | // Prevent release of waiter from running the waiter on the releasing thread by using RunContinuationsAsynch |
| | 0 | 285 | | var waiter = new TaskCompletionSource<object>(TaskCreationOptions.RunContinuationsAsynchronously); |
| | 0 | 286 | | _newMessageQueue.Enqueue(waiter); |
| | 0 | 287 | | return waiter.Task; |
| | | 288 | | } |
| | | 289 | | |
| | | 290 | | internal Task EnqueueCalloutMessage() |
| | | 291 | | { |
| | 0 | 292 | | if (_calloutMessageQueue == null) |
| | | 293 | | { |
| | 0 | 294 | | _calloutMessageQueue = new Queue<TaskCompletionSource<object>>(); |
| | | 295 | | } |
| | | 296 | | // Prevent release of waiter from running the waiter on the releasing thread by using RunContinuationsAsynch |
| | 0 | 297 | | var waiter = new TaskCompletionSource<object>(TaskCreationOptions.RunContinuationsAsynchronously); |
| | 0 | 298 | | _calloutMessageQueue.Enqueue(waiter); |
| | 0 | 299 | | return waiter.Task; |
| | | 300 | | } |
| | | 301 | | } |
| | | 302 | | } |