GetAsyncResult() private method

private GetAsyncResult ( ) : IAsyncResult
return IAsyncResult
Exemplo n.º 1
0
        [System.Security.SecurityCritical]  // auto-generated 
        internal static IMessage EndInvokeHelper(Message reqMsg, bool bProxyCase)
        { 
            AsyncResult ar = reqMsg.GetAsyncResult() as AsyncResult; 
            IMessage retMsg = null; // used for proxy case only!
            if (ar == null) 
            {
                throw new RemotingException(
                    Environment.GetResourceString(
                        "Remoting_Message_BadAsyncResult")); 
            }
            if (ar.AsyncDelegate != reqMsg.GetThisPtr()) 
            { 
                throw new InvalidOperationException(Environment.GetResourceString(
                    "InvalidOperation_MismatchedAsyncResult")); 
            }
            if (!ar.IsCompleted)
            {
                // Note: using ThreadPoolAware to detect if this is a 
                // ThreadAffinity or Synchronization context.
                ar.AsyncWaitHandle.WaitOne( 
                        Int32.MaxValue, 
                        Thread.CurrentContext.IsThreadPoolAware);
            } 

            lock (ar)
            {
                if (ar.EndInvokeCalled) 
                    throw new InvalidOperationException(
                        Environment.GetResourceString( 
                            "InvalidOperation_EndInvokeCalledMultiple")); 

                ar.EndInvokeCalled = true; 


                IMethodReturnMessage mrm =
                    (IMethodReturnMessage) ar.GetReplyMessage(); 

                Contract.Assert( 
                    mrm != null, 
                    "Reply sink should ensure we have a reply message before signalling");
 
                // For the proxy case this is handled by RealProxy
                if (!bProxyCase)
                {
                    Exception e = mrm.Exception; 

                    if (e != null) 
                    { 
                        // throw e;
                        throw e.PrepForRemoting(); 
                    }
                    else
                    {
                        reqMsg.PropagateOutParameters( 
                            mrm.Args,
                            mrm.ReturnValue); 
                    } 
                }
                else 
                {
                    retMsg = mrm;
                }
                // Merge the call context back into the thread that 
                // called EndInvoke
                CallContext.GetLogicalCallContext().Merge( 
                    mrm.LogicalCallContext); 
            }
            // Will be non-null only for proxy case! 
            return retMsg;
        } // EndInvokeHelper
 internal static IMessage EndInvokeHelper(Message reqMsg, bool bProxyCase)
 {
     AsyncResult asyncResult = reqMsg.GetAsyncResult() as AsyncResult;
     IMessage message = null;
     if (asyncResult == null)
     {
         throw new RemotingException(Environment.GetResourceString("Remoting_Message_BadAsyncResult"));
     }
     if (asyncResult.AsyncDelegate != reqMsg.GetThisPtr())
     {
         throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_MismatchedAsyncResult"));
     }
     if (!asyncResult.IsCompleted)
     {
         asyncResult.AsyncWaitHandle.WaitOne(0x7fffffff, Thread.CurrentContext.IsThreadPoolAware);
     }
     lock (asyncResult)
     {
         if (asyncResult.EndInvokeCalled)
         {
             throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EndInvokeCalledMultiple"));
         }
         asyncResult.EndInvokeCalled = true;
         IMethodReturnMessage replyMessage = (IMethodReturnMessage) asyncResult.GetReplyMessage();
         if (!bProxyCase)
         {
             Exception exception = replyMessage.Exception;
             if (exception != null)
             {
                 throw exception.PrepForRemoting();
             }
             reqMsg.PropagateOutParameters(replyMessage.Args, replyMessage.ReturnValue);
         }
         else
         {
             message = replyMessage;
         }
         CallContext.GetLogicalCallContext().Merge(replyMessage.LogicalCallContext);
     }
     return message;
 }