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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_TimingDarwin.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_TimingDarwin_h
#define libparc_parc_TimingDarwin_h
#ifdef PARCTIMING_DARWIN
#include <stdint.h>
#include <time.h>
#include <mach/mach.h>
#include <mach/clock.h>
#include <mach/mach_time.h>
/*
* This allocates the clock service which must be released in the Fini macro
*/
#define _private_parcTiming_Init(prefix) \
clock_serv_t prefix ## _clockService; \
mach_timespec_t prefix ## _ts0, prefix ## _ts1; \
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &(prefix ## _clockService));
#define _private_parcTiming_Start(prefix) \
clock_get_time((prefix ## _clockService), &(prefix ## _ts0));
#define _private_parcTiming_Stop(prefix) \
clock_get_time((prefix ## _clockService), &(prefix ## _ts1));
static inline uint64_t
_parcTiming_Delta(const mach_timespec_t *t0, const mach_timespec_t *t1)
{
// SUB_MACH_TIMESPEC(t1, t2) => t1 -= t2
mach_timespec_t delta;
memcpy(&delta, t1, sizeof(delta));
SUB_MACH_TIMESPEC(&delta, t0);
return (uint64_t) delta.tv_sec * 1000000000ULL + delta.tv_nsec;
}
#define _private_parcTiming_Delta(prefix) _parcTiming_Delta(&(prefix ## _ts0), &(prefix ## _ts1))
#define _private_parcTiming_Fini(prefix) \
mach_port_deallocate(mach_task_self(), &(prefix ## _clockService));
#endif // PARCTIMING_DARWIN
#endif // libparc_parc_TimingDarwin_h
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