98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
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/*
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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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#include "rtc_base/buffer_queue.h"
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#include <stdint.h>
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#include <string.h>
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#include <algorithm>
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namespace rtc {
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BufferQueue::BufferQueue(size_t capacity, size_t default_size)
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: capacity_(capacity), default_size_(default_size) {}
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BufferQueue::~BufferQueue() {
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webrtc::MutexLock lock(&mutex_);
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for (Buffer* buffer : queue_) {
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delete buffer;
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}
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for (Buffer* buffer : free_list_) {
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delete buffer;
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}
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}
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size_t BufferQueue::size() const {
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webrtc::MutexLock lock(&mutex_);
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return queue_.size();
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}
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void BufferQueue::Clear() {
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webrtc::MutexLock lock(&mutex_);
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while (!queue_.empty()) {
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free_list_.push_back(queue_.front());
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queue_.pop_front();
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}
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}
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bool BufferQueue::ReadFront(void* buffer, size_t bytes, size_t* bytes_read) {
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webrtc::MutexLock lock(&mutex_);
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if (queue_.empty()) {
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return false;
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}
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bool was_writable = queue_.size() < capacity_;
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Buffer* packet = queue_.front();
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queue_.pop_front();
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bytes = std::min(bytes, packet->size());
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memcpy(buffer, packet->data(), bytes);
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if (bytes_read) {
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*bytes_read = bytes;
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}
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free_list_.push_back(packet);
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if (!was_writable) {
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NotifyWritableForTest();
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}
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return true;
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}
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bool BufferQueue::WriteBack(const void* buffer,
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size_t bytes,
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size_t* bytes_written) {
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webrtc::MutexLock lock(&mutex_);
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if (queue_.size() == capacity_) {
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return false;
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}
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bool was_readable = !queue_.empty();
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Buffer* packet;
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if (!free_list_.empty()) {
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packet = free_list_.back();
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free_list_.pop_back();
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} else {
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packet = new Buffer(bytes, default_size_);
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}
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packet->SetData(static_cast<const uint8_t*>(buffer), bytes);
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if (bytes_written) {
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*bytes_written = bytes;
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}
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queue_.push_back(packet);
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if (!was_readable) {
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NotifyReadableForTest();
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}
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return true;
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}
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} // namespace rtc
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