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/*
* Copyright (c) 2017-2019 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.
*/
/**
* @brief The router periodically measures time in units of Ticks
*
* See forwarder.c HZ which specifies the tick rate. forwarder.h has functions
* to convert between ticks and milliseconds.
*
*/
#ifndef ticks_h
#define ticks_h
#define __STDC_FORMAT_MACROS
#include <stdint.h>
#include <time.h>
#include <sys/param.h> // HZ
typedef uint64_t Ticks;
// these will all be a little off because its all integer division
#define NSEC_PER_TICK ((1000000000ULL) / HZ)
#define NSEC_TO_TICKS(nsec) ((nsec < NSEC_PER_TICK) ? 1 : nsec / NSEC_PER_TICK)
#define TICKS_TO_NSEC(ticks) ((1000000000ULL) * ticks / HZ)
static inline
Ticks
ticks_now()
{
#if __linux__
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
return ts.tv_sec * 1000 + ts.tv_nsec / 1e6;
#elif _WIN32
struct timespec ts;
_clock_gettime(TIME_UTC, &ts);
return ts.tv_sec * 1000 + ts.tv_nsec / 1e6;
#else
clock_serv_t clockService;
mach_timespec_t ts;
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &clockService);
clock_get_time(clockService, &mts);
mach_port_deallocate(mach_task_self(), clockService);
#endif
return ts.tv_sec * 1000 + ts.tv_nsec / 1e6;
}
#endif // ticks_h
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