src/native_client_sdk/src/libraries/nacl_io/event_emitter_stream.h

   1 // Copyright (c) 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_EVENT_EMITTER_STREAM_H_
   6 #define LIBRARIES_NACL_IO_EVENT_EMITTER_STREAM_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 EventEmitterStream;
  16 class FIFOInterface;
  17 class MountNodeStream;
  18
  19 typedef sdk_util::ScopedRef<EventEmitterStream> ScopedEventEmitterStream;
  20
  21 class EventEmitterStream : public EventEmitter {
  22  public:
  23   EventEmitterStream();
  24
  25   void AttachStream(MountNodeStream* stream);
  26   void DetachStream();
  27
  28   MountNodeStream* stream() { return stream_; }
  29
  30   uint32_t BytesInOutputFIFO();
  31   uint32_t SpaceInInputFIFO();
  32
  33 protected:
  34   virtual FIFOInterface* in_fifo() = 0;
  35   virtual FIFOInterface* out_fifo() = 0;
  36   void UpdateStatus_Locked();
  37
  38 protected:
  39   MountNodeStream* stream_;
  40   DISALLOW_COPY_AND_ASSIGN(EventEmitterStream);
  41 };
  42
  43 }  // namespace nacl_io
  44
  45 #endif  // LIBRARIES_NACL_IO_EVENT_EMITTER_STREAM_H_
  46