Contributors: 10
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Anton Ivanov |
191 |
42.16% |
1 |
4.35% |
| Johannes Berg |
118 |
26.05% |
5 |
21.74% |
| Jeff Dike |
104 |
22.96% |
10 |
43.48% |
| Gennady Sharapov |
20 |
4.42% |
1 |
4.35% |
| Paolo 'Blaisorblade' Giarrusso |
10 |
2.21% |
1 |
4.35% |
| Richard Weinberger |
2 |
0.44% |
1 |
4.35% |
| Martin Pärtel |
2 |
0.44% |
1 |
4.35% |
| Miklos Szeredi |
2 |
0.44% |
1 |
4.35% |
| Al Viro |
2 |
0.44% |
1 |
4.35% |
| Alex Dewar |
2 |
0.44% |
1 |
4.35% |
| Total |
453 |
|
23 |
|
// 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 <unistd.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 until interrupted
*/
void os_idle_sleep(void)
{
struct itimerspec its;
sigset_t set, old;
/* block SIGALRM while we analyze the timer state */
sigemptyset(&set);
sigaddset(&set, SIGALRM);
sigprocmask(SIG_BLOCK, &set, &old);
/* check the timer, and if it'll fire then wait for it */
timer_gettime(event_high_res_timer, &its);
if (its.it_value.tv_sec || its.it_value.tv_nsec)
sigsuspend(&old);
/* either way, restore the signal mask */
sigprocmask(SIG_UNBLOCK, &set, NULL);
}