// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_UTIL_MISC_CLOCK_H_
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#define CRASHPAD_UTIL_MISC_CLOCK_H_
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#include <stdint.h>
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#include "build/build_config.h"
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namespace crashpad {
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//! \brief Returns the value of the system’s monotonic clock.
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//!
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//! The monotonic clock is a tick counter whose epoch is unspecified. It is a
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//! monotonically-increasing clock that cannot be set, and never jumps backwards
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//! on a running system. The monotonic clock may stop while the system is
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//! sleeping, and it may be reset when the system starts up. This clock is
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//! suitable for computing durations of events. Subject to the underlying
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//! clock’s resolution, successive calls to this function will result in a
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//! series of increasing values.
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//!
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//! \return The value of the system’s monotonic clock, in nanoseconds.
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uint64_t ClockMonotonicNanoseconds();
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//! \brief Sleeps for the specified duration.
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//!
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//! \param[in] nanoseconds The number of nanoseconds to sleep. The actual sleep
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//! may be slightly longer due to latencies and timer resolution.
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//!
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//! On POSIX, this function is resilient against the underlying `nanosleep()`
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//! system call being interrupted by a signal.
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void SleepNanoseconds(uint64_t nanoseconds);
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} // namespace crashpad
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#endif // CRASHPAD_UTIL_MISC_CLOCK_H_
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