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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef INCLUDE_PERFETTO_BASE_METATRACE_H_
#define INCLUDE_PERFETTO_BASE_METATRACE_H_
#include <string.h>
#include <string>
#include "perfetto/base/logging.h"
#include "perfetto/base/utils.h"
namespace perfetto {
namespace base {
class MetaTrace {
public:
static constexpr uint32_t kMainThreadCpu = 255;
MetaTrace(const char* evt_name, size_t cpu) : evt_name_(evt_name), cpu_(cpu) {
WriteEvent('B', evt_name, cpu);
}
MetaTrace(const std::string& str, size_t cpu)
: str_copy_(str), evt_name_(str_copy_.c_str()), cpu_(cpu) {
WriteEvent('B', evt_name_, cpu);
}
~MetaTrace() { WriteEvent('E', evt_name_, cpu_); }
private:
MetaTrace(const MetaTrace&) = delete;
MetaTrace& operator=(const MetaTrace&) = delete;
void WriteEvent(char type, const char* evt_name, size_t cpu);
std::string str_copy_;
const char* const evt_name_;
const size_t cpu_;
};
#define PERFETTO_METATRACE_UID2(a, b) a##b
#define PERFETTO_METATRACE_UID(x) PERFETTO_METATRACE_UID2(metatrace_, x)
#if PERFETTO_DCHECK_IS_ON() && PERFETTO_BUILDFLAG(PERFETTO_STANDALONE_BUILD)
#define PERFETTO_METATRACE(...) \
::perfetto::base::MetaTrace PERFETTO_METATRACE_UID(__COUNTER__)(__VA_ARGS__)
#else
#define PERFETTO_METATRACE(...) ::perfetto::base::ignore_result(__VA_ARGS__)
#endif
} // namespace base
} // namespace perfetto
#endif // INCLUDE_PERFETTO_BASE_METATRACE_H_
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