Engine directory for ticket #1

Engine/source/platform/async/asyncUpdate.cpp

@@ -0,0 +1,83 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#include "platform/async/asyncUpdate.h"
+#include "core/stream/tStream.h"
+
+
+//-----------------------------------------------------------------------------
+//    AsyncUpdateList implementation.
+//-----------------------------------------------------------------------------
+
+void AsyncUpdateList::process( S32 timeOut )
+{
+   U32 endTime = 0;
+   if( timeOut != -1 )
+      endTime = Platform::getRealMilliseconds() + timeOut;
+
+   // Flush the process list.
+
+   IPolled* ptr;
+   IPolled* firstProcessedPtr = 0;
+
+   while( mUpdateList.tryPopFront( ptr ) )
+   {
+      if( ptr == firstProcessedPtr )
+      {
+         // We've wrapped around.  Stop.
+
+         mUpdateList.pushFront( ptr );
+         break;
+      }
+
+      if( ptr->update() )
+      {
+         mUpdateList.pushBack( ptr );
+
+         if( !firstProcessedPtr )
+            firstProcessedPtr = ptr;
+      }
+
+      // Stop if we have exceeded our processing time budget.
+
+      if( timeOut != -1
+          && Platform::getRealMilliseconds() >= endTime )
+         break;
+   }
+}
+
+//--------------------------------------------------------------------------
+//    AsyncUpdateThread implementation.
+//--------------------------------------------------------------------------
+
+void AsyncUpdateThread::run( void* )
+{
+   _setName( getName() );
+
+   while( !checkForStop() )
+   {
+      _waitForEventAndReset();
+      
+      if( !checkForStop() )
+         mUpdateList->process();
+   }
+}