forked from luck/tmp_suning_uos_patched
97870c34b4
Convert files to use SPDX header. All files are licensed under the GPLv2. Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
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* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
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* Copyright (C) 2012-2014 Cisco Systems
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike{addtoit,linux.intel}.com)
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*/
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#include <stddef.h>
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#include <errno.h>
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#include <signal.h>
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#include <time.h>
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#include <sys/time.h>
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#include <kern_util.h>
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#include <os.h>
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#include <string.h>
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#include <timer-internal.h>
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static timer_t event_high_res_timer = 0;
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static inline long long timeval_to_ns(const struct timeval *tv)
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{
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return ((long long) tv->tv_sec * UM_NSEC_PER_SEC) +
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tv->tv_usec * UM_NSEC_PER_USEC;
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}
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static inline long long timespec_to_ns(const struct timespec *ts)
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{
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return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) + ts->tv_nsec;
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}
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long long os_persistent_clock_emulation(void)
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{
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struct timespec realtime_tp;
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clock_gettime(CLOCK_REALTIME, &realtime_tp);
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return timespec_to_ns(&realtime_tp);
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}
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/**
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* os_timer_create() - create an new posix (interval) timer
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*/
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int os_timer_create(void)
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{
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timer_t *t = &event_high_res_timer;
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if (timer_create(CLOCK_MONOTONIC, NULL, t) == -1)
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return -1;
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return 0;
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}
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int os_timer_set_interval(unsigned long long nsecs)
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{
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struct itimerspec its;
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its.it_value.tv_sec = nsecs / UM_NSEC_PER_SEC;
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its.it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC;
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its.it_interval.tv_sec = nsecs / UM_NSEC_PER_SEC;
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its.it_interval.tv_nsec = nsecs % UM_NSEC_PER_SEC;
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if (timer_settime(event_high_res_timer, 0, &its, NULL) == -1)
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return -errno;
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return 0;
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}
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int os_timer_one_shot(unsigned long long nsecs)
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{
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struct itimerspec its = {
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.it_value.tv_sec = nsecs / UM_NSEC_PER_SEC,
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.it_value.tv_nsec = nsecs % UM_NSEC_PER_SEC,
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.it_interval.tv_sec = 0,
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.it_interval.tv_nsec = 0, // we cheat here
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};
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timer_settime(event_high_res_timer, 0, &its, NULL);
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return 0;
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}
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/**
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* os_timer_disable() - disable the posix (interval) timer
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*/
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void os_timer_disable(void)
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{
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struct itimerspec its;
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memset(&its, 0, sizeof(struct itimerspec));
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timer_settime(event_high_res_timer, 0, &its, NULL);
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}
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long long os_nsecs(void)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC,&ts);
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return timespec_to_ns(&ts);
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}
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/**
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* os_idle_sleep() - sleep for a given time of nsecs
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* @nsecs: nanoseconds to sleep
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*/
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void os_idle_sleep(unsigned long long nsecs)
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{
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struct timespec ts = {
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.tv_sec = nsecs / UM_NSEC_PER_SEC,
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.tv_nsec = nsecs % UM_NSEC_PER_SEC
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};
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/*
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* Relay the signal if clock_nanosleep is interrupted.
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*/
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if (clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL))
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deliver_alarm();
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}
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