cpp/perfevents/detail/ClockOffsetMeasurement.h

/**
 * Copyright 2004-present, Facebook, Inc.
 *
 * 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.
 */

#pragma once

#include <time.h>

namespace facebook {
namespace perfevents {
namespace detail {
namespace clock {

// Measures the offset between the clock identified by clockid and the perf
// events clock. Returns INT64_MIN on error.
int64_t measureOffsetFromPerfClock(clockid_t clockid);

} // namespace clock
} // namespace detail
} // namespace perfevents
} // namespace facebook