native_client_sdk/src/libraries/nacl_io/stream/stream_event_emitter.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef LIBRARIES_NACL_IO_STREAM_STREAM_EVENT_EMITTER_H_
   6 #define LIBRARIES_NACL_IO_STREAM_STREAM_EVENT_EMITTER_H_
   7
   8 #include "nacl_io/event_emitter.h"
   9
  10 #include "sdk_util/macros.h"
  11 #include "sdk_util/scoped_ref.h"
  12
  13 namespace nacl_io {
  14
  15 class FIFOInterface;
  16 class StreamEventEmitter;
  17 class StreamNode;
  18
  19 typedef sdk_util::ScopedRef<StreamEventEmitter> ScopedStreamEventEmitter;
  20
  21 class StreamEventEmitter : public EventEmitter {
  22  public:
  23   StreamEventEmitter();
  24
  25   void AttachStream(StreamNode* stream);
  26   void DetachStream();
  27
  28   StreamNode* stream() { return stream_; }
  29
  30  protected:
  31   virtual FIFOInterface* in_fifo() = 0;
  32   virtual FIFOInterface* out_fifo() = 0;
  33   void UpdateStatus_Locked();
  34
  35  protected:
  36   StreamNode* stream_;
  37   DISALLOW_COPY_AND_ASSIGN(StreamEventEmitter);
  38 };
  39
  40 }  // namespace nacl_io
  41
  42 #endif  // LIBRARIES_NACL_IO_STREAM_STREAM_EVENT_EMITTER_H_