Split net/spdy into core and chromium subdirectories.

net/spdy/spdy_write_queue.h

-// 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 NET_SPDY_SPDY_WRITE_QUEUE_H_
-#define NET_SPDY_SPDY_WRITE_QUEUE_H_
-
-#include <deque>
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "net/base/net_export.h"
-#include "net/base/request_priority.h"
-#include "net/spdy/spdy_protocol.h"
-
-namespace net {
-
-class SpdyBufferProducer;
-class SpdyStream;
-
-// A queue of SpdyBufferProducers to produce frames to write. Ordered
-// by priority, and then FIFO.
-class NET_EXPORT_PRIVATE SpdyWriteQueue {
- public:
-  SpdyWriteQueue();
-  ~SpdyWriteQueue();
-
-  // Returns whether there is anything in the write queue,
-  // i.e. whether the next call to Dequeue will return true.
-  bool IsEmpty() const;
-
-  // Enqueues the given frame producer of the given type at the given
-  // priority associated with the given stream, which may be NULL if
-  // the frame producer is not associated with a stream. If |stream|
-  // is non-NULL, its priority must be equal to |priority|, and it
-  // must remain non-NULL until the write is dequeued or removed.
-  void Enqueue(RequestPriority priority,
-               SpdyFrameType frame_type,
-               std::unique_ptr<SpdyBufferProducer> frame_producer,
-               const base::WeakPtr<SpdyStream>& stream);
-
-  // Dequeues the frame producer with the highest priority that was
-  // enqueued the earliest and its associated stream. Returns true and
-  // fills in |frame_type|, |frame_producer|, and |stream| if
-  // successful -- otherwise, just returns false.
-  bool Dequeue(SpdyFrameType* frame_type,
-               std::unique_ptr<SpdyBufferProducer>* frame_producer,
-               base::WeakPtr<SpdyStream>* stream);
-
-  // Removes all pending writes for the given stream, which must be
-  // non-NULL.
-  void RemovePendingWritesForStream(const base::WeakPtr<SpdyStream>& stream);
-
-  // Removes all pending writes for streams after |last_good_stream_id|
-  // and streams with no stream id.
-  void RemovePendingWritesForStreamsAfter(SpdyStreamId last_good_stream_id);
-
-  // Removes all pending writes.
-  void Clear();
-
-  // Returns the estimate of dynamically allocated memory in bytes.
-  size_t EstimateMemoryUsage() const;
-
- private:
-  // A struct holding a frame producer and its associated stream.
-  struct PendingWrite {
-    SpdyFrameType frame_type;
-    std::unique_ptr<SpdyBufferProducer> frame_producer;
-    base::WeakPtr<SpdyStream> stream;
-    // Whether |stream| was non-NULL when enqueued.
-    bool has_stream;
-
-    PendingWrite();
-    PendingWrite(SpdyFrameType frame_type,
-                 std::unique_ptr<SpdyBufferProducer> frame_producer,
-                 const base::WeakPtr<SpdyStream>& stream);
-    ~PendingWrite();
-    PendingWrite(PendingWrite&& other);
-    PendingWrite& operator=(PendingWrite&& other);
-
-    size_t EstimateMemoryUsage() const;
-
-    DISALLOW_COPY_AND_ASSIGN(PendingWrite);
-  };
-
-  bool removing_writes_;
-
-  // The actual write queue, binned by priority.
-  std::deque<PendingWrite> queue_[NUM_PRIORITIES];
-
-  DISALLOW_COPY_AND_ASSIGN(SpdyWriteQueue);
-};
-
-}  // namespace net
-
-#endif  // NET_SPDY_SPDY_WRITE_QUEUE_H_