Method Multiple

cpp/src/platform/Wait.cpp:122–170

----------------------------------------------------------------------------- Wait for one of multiple objects to become signalled. -----------------------------------------------------------------------------

//	Wait for one of multiple objects to become signalled.
//-----------------------------------------------------------------------------
int32 Wait::Multiple
(
	Wait** _objects,
	uint32 _numObjects,
	int32 _timeout // = -1
)
{
	uint32 i;

	// Create an event that will be set when any of the objects in the list becomes signalled.
	Event* waitEvent = new Event();

	// Add a watcher to each object in the list, passing in the event as the context.
	for( i=0; i<_numObjects; ++i )
	{
//		Log::Write( LogLevel_Info, "Wait::Multiple - Object %p %d", _objects[i], _objects[i]->IsSignalled());
		_objects[i]->AddWatcher( WaitMultipleCallback, waitEvent );
	}

	int32 res = -1;	// Default to timeout result
	string str = "";
	if( waitEvent->Wait( _timeout ) )
	{
		// An object was signalled.  Run through the list
		// and see which one it was.
		for( i=0; i<_numObjects; ++i )
		{
			if( _objects[i]->IsSignalled() )
			{
				if( res == -1 )
					res = (int32)i;
				char buf[15];
				snprintf(buf, sizeof(buf), "%d, ", i);
				str += buf;
			}
		}
	}
//	Log::Write( LogLevel_Debug, "Wait::Multiple res=%d num=%d >%s", res, _numObjects, str.c_str() );

	// Remove the watchers
	for( i=0; i<_numObjects; ++i )
	{
		_objects[i]->RemoveWatcher( WaitMultipleCallback, waitEvent );
	}

	// We're done with the event now
	waitEvent->Release();
	return res;
}


//-----------------------------------------------------------------------------