118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
|
|
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
|
|
* Copyright (C) 2012-2014 Cisco Systems
|
|
* Copyright (C) 2000 - 2007 Jeff Dike (jdike{addtoit,linux.intel}.com)
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <kern_util.h>
|
|
#include <os.h>
|
|
#include <string.h>
|
|
|
|
static timer_t event_high_res_timer = 0;
|
|
|
|
static inline long long timeval_to_ns(const struct timeval *tv)
|
|
{
|
|
return ((long long) tv->tv_sec * UM_NSEC_PER_SEC) +
|
|
tv->tv_usec * UM_NSEC_PER_USEC;
|
|
}
|
|
|
|
static inline long long timespec_to_ns(const struct timespec *ts)
|
|
{
|
|
return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) + ts->tv_nsec;
|
|
}
|
|
|
|
long long os_persistent_clock_emulation(void)
|
|
{
|
|
struct timespec realtime_tp;
|
|
|
|
clock_gettime(CLOCK_REALTIME, &realtime_tp);
|
|
return timespec_to_ns(&realtime_tp);
|
|
}
|
|
|
|
/**
|
|
* os_timer_create() - create an new posix (interval) timer
|
|
*/
|
|
int os_timer_create(void)
|
|
{
|
|
timer_t *t = &event_high_res_timer;
|
|
|
|
if (timer_create(CLOCK_MONOTONIC, NULL, t) == -1)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_timer_set_interval(unsigned long long nsecs)
|
|
{
|
|
struct itimerspec its;
|
|
|
|
its.it_value.tv_sec = nsecs / UM_NSEC_PER_SEC;
|
|
its.it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC;
|
|
|
|
its.it_interval.tv_sec = nsecs / UM_NSEC_PER_SEC;
|
|
its.it_interval.tv_nsec = nsecs % UM_NSEC_PER_SEC;
|
|
|
|
if (timer_settime(event_high_res_timer, 0, &its, NULL) == -1)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int os_timer_one_shot(unsigned long long nsecs)
|
|
{
|
|
struct itimerspec its = {
|
|
.it_value.tv_sec = nsecs / UM_NSEC_PER_SEC,
|
|
.it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC,
|
|
|
|
.it_interval.tv_sec = 0,
|
|
.it_interval.tv_nsec = 0, // we cheat here
|
|
};
|
|
|
|
timer_settime(event_high_res_timer, 0, &its, NULL);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* os_timer_disable() - disable the posix (interval) timer
|
|
*/
|
|
void os_timer_disable(void)
|
|
{
|
|
struct itimerspec its;
|
|
|
|
memset(&its, 0, sizeof(struct itimerspec));
|
|
timer_settime(event_high_res_timer, 0, &its, NULL);
|
|
}
|
|
|
|
long long os_nsecs(void)
|
|
{
|
|
struct timespec ts;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC,&ts);
|
|
return timespec_to_ns(&ts);
|
|
}
|
|
|
|
/**
|
|
* os_idle_sleep() - sleep for a given time of nsecs
|
|
* @nsecs: nanoseconds to sleep
|
|
*/
|
|
void os_idle_sleep(unsigned long long nsecs)
|
|
{
|
|
struct timespec ts = {
|
|
.tv_sec = nsecs / UM_NSEC_PER_SEC,
|
|
.tv_nsec = nsecs % UM_NSEC_PER_SEC
|
|
};
|
|
|
|
/*
|
|
* Relay the signal if clock_nanosleep is interrupted.
|
|
*/
|
|
if (clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL))
|
|
deliver_alarm();
|
|
}
|