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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/media/webrtc/webrtc_log_buffer.h"
#include <ostream>
#include "base/check_op.h"
WebRtcLogBuffer::WebRtcLogBuffer()
: buffer_(),
circular_(&buffer_[0], sizeof(buffer_), sizeof(buffer_) / 2, false),
read_only_(false) {}
WebRtcLogBuffer::~WebRtcLogBuffer() {
#if DCHECK_IS_ON()
DCHECK(read_only_ || sequence_checker_.CalledOnValidSequence());
#endif
}
void WebRtcLogBuffer::Log(const std::string& message) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!read_only_);
circular_.Write(message.c_str(), message.length());
const char eol = '\n';
circular_.Write(&eol, 1);
}
webrtc_logging::PartialCircularBuffer WebRtcLogBuffer::Read() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(read_only_);
return webrtc_logging::PartialCircularBuffer(&buffer_[0], sizeof(buffer_));
}
void WebRtcLogBuffer::SetComplete() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!read_only_) << "Already set? (programmer error)";
read_only_ = true;
// Detach from the current sequence so that we can check reads on a different
// sequence. This is to make sure that Read()s still happen on one sequence
// only.
DETACH_FROM_SEQUENCE(sequence_checker_);
}
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