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/*
* Copyright (C) 2016 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 SIMPLE_PERF_PERF_CLOCK_H_
#define SIMPLE_PERF_PERF_CLOCK_H_
#include <stdint.h>
// Perf clock is the clock used by the kernel to generate timestamps in perf
// event records. We use a separate init function because it allocates a mapped
// buffer for perf event file, which might not be available during profiling.
// And we'd better call the init function before profiling.
// InitPerfClock() must be called before GetPerfClock().
bool InitPerfClock();
uint64_t GetPerfClock();
#endif // SIMPLE_PERF_PERF_CLOCK_H_
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