71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/*
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* Copyright 2015 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_BUFFER_QUEUE_H_
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#define RTC_BASE_BUFFER_QUEUE_H_
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#include <stddef.h>
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#include <deque>
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#include <vector>
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#include "api/sequence_checker.h"
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#include "rtc_base/buffer.h"
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#include "rtc_base/constructor_magic.h"
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#include "rtc_base/system/no_unique_address.h"
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#include "rtc_base/thread_annotations.h"
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namespace rtc {
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class BufferQueue final {
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public:
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// Creates a buffer queue with a given capacity and default buffer size.
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BufferQueue(size_t capacity, size_t default_size);
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~BufferQueue();
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// Return number of queued buffers.
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size_t size() const;
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// Clear the BufferQueue by moving all Buffers from `queue_` to `free_list_`.
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void Clear();
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// ReadFront will only read one buffer at a time and will truncate buffers
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// that don't fit in the passed memory.
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// Returns true unless no data could be returned.
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bool ReadFront(void* data, size_t bytes, size_t* bytes_read);
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// WriteBack always writes either the complete memory or nothing.
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// Returns true unless no data could be written.
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bool WriteBack(const void* data, size_t bytes, size_t* bytes_written);
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bool is_writable() const {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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return queue_.size() < capacity_;
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}
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bool is_readable() const {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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return !queue_.empty();
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}
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private:
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RTC_NO_UNIQUE_ADDRESS webrtc::SequenceChecker sequence_checker_;
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const size_t capacity_;
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const size_t default_size_;
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std::deque<Buffer*> queue_ RTC_GUARDED_BY(sequence_checker_);
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std::vector<Buffer*> free_list_ RTC_GUARDED_BY(sequence_checker_);
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RTC_DISALLOW_COPY_AND_ASSIGN(BufferQueue);
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};
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} // namespace rtc
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#endif // RTC_BASE_BUFFER_QUEUE_H_
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