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54 lines
1.3 KiB
C++
54 lines
1.3 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_READ_QUEUE_H_
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#define NET_SPDY_SPDY_READ_QUEUE_H_
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#include <cstddef>
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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 "net/base/net_export.h"
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namespace net {
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class SpdyBuffer;
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// A FIFO queue of incoming data from a SPDY connection. Useful for
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// SpdyStream delegates.
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class NET_EXPORT_PRIVATE SpdyReadQueue {
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public:
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SpdyReadQueue();
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~SpdyReadQueue();
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// Returns whether there's anything in the queue.
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bool IsEmpty() const;
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// Returns the total number of bytes in the queue.
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size_t GetTotalSize() const;
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// Enqueues the bytes in |buffer|.
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void Enqueue(std::unique_ptr<SpdyBuffer> buffer);
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// Dequeues up to |len| (which must be positive) bytes into
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// |out|. Returns the number of bytes dequeued.
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size_t Dequeue(char* out, size_t len);
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// Removes all bytes from the queue.
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void Clear();
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private:
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// Class invariant:
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// |total_size_| is the sum of GetRemainingSize() of |queue_|'s elements.
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base::circular_deque<std::unique_ptr<SpdyBuffer>> queue_;
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size_t total_size_;
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DISALLOW_COPY_AND_ASSIGN(SpdyReadQueue);
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};
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} // namespace net
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#endif // NET_SPDY_SPDY_READ_QUEUE_H_
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