// Copyright 2014 The Crashpad Authors // // 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 CRASHPAD_UTIL_MISC_CLOCK_H_ #define CRASHPAD_UTIL_MISC_CLOCK_H_ #include <stdint.h> #include "build/build_config.h" namespace crashpad { //! \brief Returns the value of the system’s monotonic clock. //! //! The monotonic clock is a tick counter whose epoch is unspecified. It is a //! monotonically-increasing clock that cannot be set, and never jumps backwards //! on a running system. The monotonic clock may stop while the system is //! sleeping, and it may be reset when the system starts up. This clock is //! suitable for computing durations of events. Subject to the underlying //! clock’s resolution, successive calls to this function will result in a //! series of increasing values. //! //! \return The value of the system’s monotonic clock, in nanoseconds. uint64_t ClockMonotonicNanoseconds(); //! \brief Sleeps for the specified duration. //! //! \param[in] nanoseconds The number of nanoseconds to sleep. The actual sleep //! may be slightly longer due to latencies and timer resolution. //! //! On POSIX, this function is resilient against the underlying `nanosleep()` //! system call being interrupted by a signal. void SleepNanoseconds(uint64_t nanoseconds); } // namespace crashpad #endif // CRASHPAD_UTIL_MISC_CLOCK_H_