[NaCl SDK] Support non blocking TCP/UDP

native_client_sdk/src/libraries/nacl_io/event_emitter_pipe.h

Index: native_client_sdk/src/libraries/nacl_io/event_emitter_pipe.h
diff --git a/native_client_sdk/src/libraries/nacl_io/event_emitter_pipe.h b/native_client_sdk/src/libraries/nacl_io/event_emitter_pipe.h
new file mode 100644
index 0000000000000000000000000000000000000000..2dfa5648ec149af2ab40e3bb591b24aa46d95295
--- /dev/null
+++ b/native_client_sdk/src/libraries/nacl_io/event_emitter_pipe.h
@@ -0,0 +1,41 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef LIBRARIES_NACL_IO_EVENT_EMITTER_PIPE_H_
+#define LIBRARIES_NACL_IO_EVENT_EMITTER_PIPE_H_
+
+#include <poll.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "nacl_io/event_emitter_stream.h"
+#include "nacl_io/fifo_char.h"
+
+#include "sdk_util/auto_lock.h"
+#include "sdk_util/macros.h"
+
+namespace nacl_io {
+
+class EventEmitterPipe;
+typedef sdk_util::ScopedRef<EventEmitterPipe> ScopedEventEmitterPipe;
+
+class EventEmitterPipe : public EventEmitterStream {
+ public:
+  EventEmitterPipe(size_t size);
+
+  size_t Read_Locked(char* data, size_t len);
+  size_t Write_Locked(const char* data, size_t len);
+
+  virtual FIFOInterface* rx_fifo() { return &fifo_; }

[binji, 2013/09/15 22:18:58]

I don't really like rx/tx. How about read_fifo/write_fifo? or in_fifo/out_fifo?
Or receive/transmit?

[noelallen1, 2013/09/17 21:21:54]

Done.

+  virtual FIFOInterface* tx_fifo() { return &fifo_; }

[binji, 2013/09/15 22:18:58]

You can use covariant return types for all of these:

virtual FIFOChar* tx_fifo() {...}

That way if you have a EventEmitterPipe* you don't have to downcast.

[noelallen1, 2013/09/17 21:21:54]

Done.

+
+private:
+  FIFOChar fifo_;
+  DISALLOW_COPY_AND_ASSIGN(EventEmitterPipe);
+};
+
+}  // namespace nacl_io
+
+#endif  // LIBRARIES_NACL_IO_EVENT_EMITTER_PIPE_H_
+