mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 22:00:47 +01:00
665174fdbb
Running clang-format with chromium's style guide. The goal is n-fold: * providing consistency and readability (that's what code guidelines are for) * preventing noise with presubmit checks and git cl format * building on the previous point: making it easier to automatically fix format issues * you name it Please consider using git-hyper-blame to ignore this commit. Bug: webrtc:9340 Change-Id: I694567c4cdf8cee2860958cfe82bfaf25848bb87 Reviewed-on: https://webrtc-review.googlesource.com/81185 Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23660}
107 lines
3 KiB
C++
107 lines
3 KiB
C++
/*
|
|
* Copyright 2016 The WebRTC Project Authors. All rights reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "rtc_base/copyonwritebuffer.h"
|
|
|
|
namespace rtc {
|
|
|
|
CopyOnWriteBuffer::CopyOnWriteBuffer() {
|
|
RTC_DCHECK(IsConsistent());
|
|
}
|
|
|
|
CopyOnWriteBuffer::CopyOnWriteBuffer(const CopyOnWriteBuffer& buf)
|
|
: buffer_(buf.buffer_) {}
|
|
|
|
CopyOnWriteBuffer::CopyOnWriteBuffer(CopyOnWriteBuffer&& buf)
|
|
: buffer_(std::move(buf.buffer_)) {}
|
|
|
|
CopyOnWriteBuffer::CopyOnWriteBuffer(size_t size)
|
|
: buffer_(size > 0 ? new RefCountedObject<Buffer>(size) : nullptr) {
|
|
RTC_DCHECK(IsConsistent());
|
|
}
|
|
|
|
CopyOnWriteBuffer::CopyOnWriteBuffer(size_t size, size_t capacity)
|
|
: buffer_(size > 0 || capacity > 0
|
|
? new RefCountedObject<Buffer>(size, capacity)
|
|
: nullptr) {
|
|
RTC_DCHECK(IsConsistent());
|
|
}
|
|
|
|
CopyOnWriteBuffer::~CopyOnWriteBuffer() = default;
|
|
|
|
bool CopyOnWriteBuffer::operator==(const CopyOnWriteBuffer& buf) const {
|
|
// Must either use the same buffer internally or have the same contents.
|
|
RTC_DCHECK(IsConsistent());
|
|
RTC_DCHECK(buf.IsConsistent());
|
|
return buffer_.get() == buf.buffer_.get() ||
|
|
(buffer_.get() && buf.buffer_.get() &&
|
|
*buffer_.get() == *buf.buffer_.get());
|
|
}
|
|
|
|
void CopyOnWriteBuffer::SetSize(size_t size) {
|
|
RTC_DCHECK(IsConsistent());
|
|
if (!buffer_) {
|
|
if (size > 0) {
|
|
buffer_ = new RefCountedObject<Buffer>(size);
|
|
}
|
|
RTC_DCHECK(IsConsistent());
|
|
return;
|
|
}
|
|
|
|
// Clone data if referenced.
|
|
if (!buffer_->HasOneRef()) {
|
|
buffer_ = new RefCountedObject<Buffer>(buffer_->data(),
|
|
std::min(buffer_->size(), size),
|
|
std::max(buffer_->capacity(), size));
|
|
}
|
|
buffer_->SetSize(size);
|
|
RTC_DCHECK(IsConsistent());
|
|
}
|
|
|
|
void CopyOnWriteBuffer::EnsureCapacity(size_t capacity) {
|
|
RTC_DCHECK(IsConsistent());
|
|
if (!buffer_) {
|
|
if (capacity > 0) {
|
|
buffer_ = new RefCountedObject<Buffer>(0, capacity);
|
|
}
|
|
RTC_DCHECK(IsConsistent());
|
|
return;
|
|
} else if (capacity <= buffer_->capacity()) {
|
|
return;
|
|
}
|
|
|
|
CloneDataIfReferenced(std::max(buffer_->capacity(), capacity));
|
|
buffer_->EnsureCapacity(capacity);
|
|
RTC_DCHECK(IsConsistent());
|
|
}
|
|
|
|
void CopyOnWriteBuffer::Clear() {
|
|
if (!buffer_)
|
|
return;
|
|
|
|
if (buffer_->HasOneRef()) {
|
|
buffer_->Clear();
|
|
} else {
|
|
buffer_ = new RefCountedObject<Buffer>(0, buffer_->capacity());
|
|
}
|
|
RTC_DCHECK(IsConsistent());
|
|
}
|
|
|
|
void CopyOnWriteBuffer::CloneDataIfReferenced(size_t new_capacity) {
|
|
if (buffer_->HasOneRef()) {
|
|
return;
|
|
}
|
|
|
|
buffer_ = new RefCountedObject<Buffer>(buffer_->data(), buffer_->size(),
|
|
new_capacity);
|
|
RTC_DCHECK(IsConsistent());
|
|
}
|
|
|
|
} // namespace rtc
|