// This method is not thread safe. It must only be called after enforcing at most 1 outstanding send operation
internal void PinSendBuffer(ArraySegment <byte> payload, out bool bufferHasBeenPinned)
{
bufferHasBeenPinned = false;
WebSocketValidate.ValidateBuffer(payload.Array, payload.Offset, payload.Count);
int previousState = Interlocked.Exchange(ref _sendBufferState, SendBufferState.SendPayloadSpecified);
if (previousState != SendBufferState.None)
{
Debug.Assert(false, "'m_SendBufferState' MUST BE 'None' at this point.");
// Indicates a violation in the API contract that could indicate
// memory corruption because the pinned sendbuffer is shared between managed and native code
throw new AccessViolationException();
}
_pinnedSendBuffer = payload;
_pinnedSendBufferHandle = GCHandle.Alloc(_pinnedSendBuffer.Array, GCHandleType.Pinned);
bufferHasBeenPinned = true;
_pinnedSendBufferStartAddress =
Marshal.UnsafeAddrOfPinnedArrayElement(_pinnedSendBuffer.Array, _pinnedSendBuffer.Offset).ToInt64();
_pinnedSendBufferEndAddress = _pinnedSendBufferStartAddress + _pinnedSendBuffer.Count;
}
public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
WebSocketValidate.ValidateBuffer(buffer, offset, count);
return(WriteAsyncCore(buffer, offset, count, cancellationToken));
}
