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authorJohannes Berg <johannes.berg@intel.com>2019-05-06 15:39:38 +0300
committerRichard Weinberger <richard@nod.at>2019-07-03 00:27:00 +0300
commit56fc187065451ebca74edb30d50de5f10a88339b (patch)
treef1370d263c22e3e6597f2228280d2d5eb88ed8ed /arch/um/os-Linux
parentfcd242c6c835dff4b5334b4db870f9fc23a8e7b7 (diff)
downloadlinux-56fc187065451ebca74edb30d50de5f10a88339b.tar.xz
um: Timer code cleanup
There are some unused functions, and some others that have unused arguments; clean up the timer code a bit. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/os-Linux')
-rw-r--r--arch/um/os-Linux/time.c119
1 files changed, 26 insertions, 93 deletions
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index b28cc35da21f..ea720149f5b8 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -26,11 +26,11 @@ static inline long long timeval_to_ns(const struct timeval *tv)
static inline long long timespec_to_ns(const struct timespec *ts)
{
- return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) +
- ts->tv_nsec;
+ return ((long long) ts->tv_sec * UM_NSEC_PER_SEC) + ts->tv_nsec;
}
-long long os_persistent_clock_emulation (void) {
+long long os_persistent_clock_emulation(void)
+{
struct timespec realtime_tp;
clock_gettime(CLOCK_REALTIME, &realtime_tp);
@@ -40,94 +40,45 @@ long long os_persistent_clock_emulation (void) {
/**
* os_timer_create() - create an new posix (interval) timer
*/
-int os_timer_create(void* timer) {
-
- timer_t* t = timer;
-
- if(t == NULL) {
- t = &event_high_res_timer;
- }
+int os_timer_create(void)
+{
+ timer_t *t = &event_high_res_timer;
- if (timer_create(
- CLOCK_MONOTONIC,
- NULL,
- t) == -1) {
+ if (timer_create(CLOCK_MONOTONIC, NULL, t) == -1)
return -1;
- }
+
return 0;
}
-int os_timer_set_interval(void* timer, void* i)
+int os_timer_set_interval(void)
{
struct itimerspec its;
unsigned long long nsec;
- timer_t* t = timer;
- struct itimerspec* its_in = i;
-
- if(t == NULL) {
- t = &event_high_res_timer;
- }
nsec = UM_NSEC_PER_SEC / UM_HZ;
- if(its_in != NULL) {
- its.it_value.tv_sec = its_in->it_value.tv_sec;
- its.it_value.tv_nsec = its_in->it_value.tv_nsec;
- } else {
- its.it_value.tv_sec = 0;
- its.it_value.tv_nsec = nsec;
- }
+ its.it_value.tv_sec = 0;
+ its.it_value.tv_nsec = nsec;
its.it_interval.tv_sec = 0;
its.it_interval.tv_nsec = nsec;
- if(timer_settime(*t, 0, &its, NULL) == -1) {
+ if (timer_settime(event_high_res_timer, 0, &its, NULL) == -1)
return -errno;
- }
return 0;
}
-/**
- * os_timer_remain() - returns the remaining nano seconds of the given interval
- * timer
- * Because this is the remaining time of an interval timer, which correspondends
- * to HZ, this value can never be bigger than one second. Just
- * the nanosecond part of the timer is returned.
- * The returned time is relative to the start time of the interval timer.
- * Return an negative value in an error case.
- */
-long os_timer_remain(void* timer)
-{
- struct itimerspec its;
- timer_t* t = timer;
-
- if(t == NULL) {
- t = &event_high_res_timer;
- }
-
- if(timer_gettime(t, &its) == -1) {
- return -errno;
- }
-
- return its.it_value.tv_nsec;
-}
-
int os_timer_one_shot(unsigned long ticks)
{
- struct itimerspec its;
- unsigned long long nsec;
- unsigned long sec;
+ unsigned long long nsec = ticks + 1;
+ struct itimerspec its = {
+ .it_value.tv_sec = nsec / UM_NSEC_PER_SEC,
+ .it_value.tv_nsec = nsec % UM_NSEC_PER_SEC,
- nsec = (ticks + 1);
- sec = nsec / UM_NSEC_PER_SEC;
- nsec = nsec % UM_NSEC_PER_SEC;
-
- its.it_value.tv_sec = nsec / UM_NSEC_PER_SEC;
- its.it_value.tv_nsec = nsec;
-
- its.it_interval.tv_sec = 0;
- its.it_interval.tv_nsec = 0; // we cheat here
+ .it_interval.tv_sec = 0,
+ .it_interval.tv_nsec = 0, // we cheat here
+ };
timer_settime(event_high_res_timer, 0, &its, NULL);
return 0;
@@ -135,24 +86,13 @@ int os_timer_one_shot(unsigned long ticks)
/**
* os_timer_disable() - disable the posix (interval) timer
- * Returns the remaining interval timer time in nanoseconds
*/
-long long os_timer_disable(void)
+void os_timer_disable(void)
{
struct itimerspec its;
memset(&its, 0, sizeof(struct itimerspec));
- timer_settime(event_high_res_timer, 0, &its, &its);
-
- return its.it_value.tv_sec * UM_NSEC_PER_SEC + its.it_value.tv_nsec;
-}
-
-long long os_vnsecs(void)
-{
- struct timespec ts;
-
- clock_gettime(CLOCK_PROCESS_CPUTIME_ID,&ts);
- return timespec_to_ns(&ts);
+ timer_settime(event_high_res_timer, 0, &its, NULL);
}
long long os_nsecs(void)
@@ -169,21 +109,14 @@ long long os_nsecs(void)
*/
void os_idle_sleep(unsigned long long nsecs)
{
- struct timespec ts;
-
- if (nsecs <= 0) {
- return;
- }
-
- ts = ((struct timespec) {
- .tv_sec = nsecs / UM_NSEC_PER_SEC,
- .tv_nsec = nsecs % UM_NSEC_PER_SEC
- });
+ 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)) {
+ if (clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL))
deliver_alarm();
- }
}