net/spdy/spdy_read_queue.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 NET_SPDY_SPDY_BUFFER_QUEUE_H_
   6 #define NET_SPDY_SPDY_BUFFER_QUEUE_H_
   7
   8 #include <cstddef>
   9 #include <deque>
  10
  11 #include "base/basictypes.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "net/base/net_export.h"
  14
  15 namespace net {
  16
  17 class SpdyBuffer;
  18
  19 // A FIFO queue of incoming data from a SPDY connection. Useful for
  20 // SpdyStream delegates.
  21 class NET_EXPORT_PRIVATE SpdyReadQueue {
  22  public:
  23   SpdyReadQueue();
  24   ~SpdyReadQueue();
  25
  26   // Returns whether there's anything in the queue.
  27   bool IsEmpty() const;
  28
  29   // Returns the total number of bytes in the queue.
  30   size_t GetTotalSize() const;
  31
  32   // Enqueues the bytes in |buffer|.
  33   void Enqueue(scoped_ptr<SpdyBuffer> buffer);
  34
  35   // Dequeues up to |len| (which must be positive) bytes into
  36   // |out|. Returns the number of bytes dequeued.
  37   size_t Dequeue(char* out, size_t len);
  38
  39   // Removes all bytes from the queue.
  40   void Clear();
  41
  42  private:
  43   std::deque<SpdyBuffer*> queue_;
  44   size_t total_size_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(SpdyReadQueue);
  47 };
  48
  49 }  // namespace net
  50
  51 #endif  // NET_SPDY_SPDY_BUFFER_QUEUE_H_