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111 lines
3.9 KiB
C++
111 lines
3.9 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_SPDY_SPDY_WRITE_QUEUE_H_
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#define NET_SPDY_SPDY_WRITE_QUEUE_H_
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#include <memory>
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#include "base/containers/circular_deque.h"
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#include "base/macros.h"
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#include "base/memory/weak_ptr.h"
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#include "net/base/net_export.h"
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#include "net/base/request_priority.h"
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#include "net/third_party/spdy/core/spdy_protocol.h"
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#include "net/traffic_annotation/network_traffic_annotation.h"
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namespace net {
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class SpdyBufferProducer;
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class SpdyStream;
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// A queue of SpdyBufferProducers to produce frames to write. Ordered
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// by priority, and then FIFO.
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class NET_EXPORT_PRIVATE SpdyWriteQueue {
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public:
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SpdyWriteQueue();
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~SpdyWriteQueue();
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// Returns whether there is anything in the write queue,
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// i.e. whether the next call to Dequeue will return true.
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bool IsEmpty() const;
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// Enqueues the given frame producer of the given type at the given
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// priority associated with the given stream, which may be NULL if
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// the frame producer is not associated with a stream. If |stream|
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// is non-NULL, its priority must be equal to |priority|, and it
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// must remain non-NULL until the write is dequeued or removed.
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void Enqueue(RequestPriority priority,
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spdy::SpdyFrameType frame_type,
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std::unique_ptr<SpdyBufferProducer> frame_producer,
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const base::WeakPtr<SpdyStream>& stream,
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const NetworkTrafficAnnotationTag& traffic_annotation);
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// Dequeues the frame producer with the highest priority that was
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// enqueued the earliest and its associated stream. Returns true and
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// fills in |frame_type|, |frame_producer|, and |stream| if
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// successful -- otherwise, just returns false.
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bool Dequeue(spdy::SpdyFrameType* frame_type,
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std::unique_ptr<SpdyBufferProducer>* frame_producer,
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base::WeakPtr<SpdyStream>* stream,
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MutableNetworkTrafficAnnotationTag* traffic_annotation);
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// Removes all pending writes for the given stream, which must be
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// non-NULL.
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void RemovePendingWritesForStream(SpdyStream* stream);
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// Removes all pending writes for streams after |last_good_stream_id|
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// and streams with no stream id.
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void RemovePendingWritesForStreamsAfter(
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spdy::SpdyStreamId last_good_stream_id);
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// Change priority of all pending writes for the given stream. Frames will be
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// queued after other writes with |new_priority|.
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void ChangePriorityOfWritesForStream(SpdyStream* stream,
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RequestPriority old_priority,
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RequestPriority new_priority);
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// Removes all pending writes.
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void Clear();
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// Returns the estimate of dynamically allocated memory in bytes.
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size_t EstimateMemoryUsage() const;
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private:
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// A struct holding a frame producer and its associated stream.
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struct PendingWrite {
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spdy::SpdyFrameType frame_type;
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std::unique_ptr<SpdyBufferProducer> frame_producer;
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base::WeakPtr<SpdyStream> stream;
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MutableNetworkTrafficAnnotationTag traffic_annotation;
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// Whether |stream| was non-NULL when enqueued.
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bool has_stream;
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PendingWrite();
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PendingWrite(spdy::SpdyFrameType frame_type,
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std::unique_ptr<SpdyBufferProducer> frame_producer,
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const base::WeakPtr<SpdyStream>& stream,
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const MutableNetworkTrafficAnnotationTag& traffic_annotation);
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~PendingWrite();
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PendingWrite(PendingWrite&& other);
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PendingWrite& operator=(PendingWrite&& other);
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size_t EstimateMemoryUsage() const;
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private:
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DISALLOW_COPY_AND_ASSIGN(PendingWrite);
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};
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bool removing_writes_;
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// The actual write queue, binned by priority.
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base::circular_deque<PendingWrite> queue_[NUM_PRIORITIES];
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DISALLOW_COPY_AND_ASSIGN(SpdyWriteQueue);
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};
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} // namespace net
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#endif // NET_SPDY_SPDY_WRITE_QUEUE_H_
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