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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* 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.
*/
/**
* @file parc_TimingLinux.h
* @brief Macros for timing code
*
* On linux will use clock_gettime with the MONOTONIC RAW clock, which does not speed up or slow down based on adj_time().
*
*/
#ifndef libparc_parc_TimingLinux_h
#define libparc_parc_TimingLinux_h
#ifdef PARCTIMING_LINUX
#include <stdint.h>
#include <time.h>
#include <sys/time.h>
#define _private_parcTiming_Init(prefix) \
struct timespec prefix ## _ts0, prefix ## _ts1;
#define _private_parcTiming_Start(prefix) \
clock_gettime(CLOCK_MONOTONIC_RAW, &(prefix ## _ts0));
#define _private_parcTiming_Stop(prefix) \
clock_gettime(CLOCK_MONOTONIC_RAW, &(prefix ## _ts1));
static inline uint64_t
_parcTimingLinux_Delta(const struct timespec *t0, const struct timespec *t1)
{
struct timespec delta;
delta.tv_sec = t1->tv_sec - t0->tv_sec;
delta.tv_nsec = t1->tv_nsec - t0->tv_nsec;
if (delta.tv_nsec < 0) {
--delta.tv_sec;
delta.tv_nsec += 1000000000;
}
return (uint64_t) delta.tv_sec * 1000000000ULL + delta.tv_nsec;
}
#define _private_parcTiming_Delta(prefix) _parcTimingLinux_Delta(&(prefix ## _ts0), &(prefix ## _ts1))
// No teardown work that we need to do
#define _private_parcTiming_Fini(prefix)
#endif // PARCTIMING_LINUX
#endif // libparc_parc_TimingLinux_h
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