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task: several portability improvements for macOS

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This commit is contained in:
Steffen Vogel 2018-10-21 20:28:47 +01:00
parent b8df22ebe7
commit c726e68b44
1 changed files with 18 additions and 27 deletions
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45
common/lib/task.c
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@ -94,7 +94,6 @@ int task_set_next(struct task *t, struct timespec *next)
int task_set_rate(struct task *t, double rate)
{
#if PERIODIC_TASK_IMPL == RDTSC
t->period = tsc_rate_to_cycles(&t->tsc, rate);
t->next = tsc_now(&t->tsc) + t->period;
@ -135,18 +134,6 @@ int task_destroy(struct task *t)
return 0;
}
#if PERIODIC_TASK_IMPL == CLOCK_NANOSLEEP || PERIODIC_TASK_IMPL == NANOSLEEP
static int time_lt(const struct timespec *lhs, const struct timespec *rhs)
{
if (lhs->tv_sec == rhs->tv_sec)
return lhs->tv_nsec < rhs->tv_nsec;
else
return lhs->tv_sec < rhs->tv_sec;
return 0;
}
#endif
uint64_t task_wait(struct task *t)
{
uint64_t runs;
@ -155,29 +142,33 @@ uint64_t task_wait(struct task *t)
int ret;
struct timespec now;
ret = clock_gettime(t->clock, &now);
if (ret)
return ret;
for (runs = 0; time_cmp(&t->next, &now) < 0; runs++)
t->next = time_add(&t->next, &t->period);
#if PERIODIC_TASK_IMPL == CLOCK_NANOSLEEP
do {
ret = clock_nanosleep(t->clock, TIMER_ABSTIME, &t->next, NULL);
} while (ret == EINTR);
#elif PERIODIC_TASK_IMPL == NANOSLEEP
struct timespec delta;
struct timespec req, rem = time_diff(&now, &t->next);
do {
req = rem;
ret = nanosleep(&req, &rem);
} while (ret < 0 && errno == EINTR);
#endif
if (ret)
return 0;
ret = clock_gettime(t->clock, &now);
if (ret)
return ret;
delta = time_diff(&now, &t->next);
ret = nanosleep(&delta, NULL);
#endif
if (ret < 0)
return 0;
ret = clock_gettime(t->clock, &now);
if (ret)
return 0;
for (runs = 0; time_lt(&t->next, &now); runs++)
for (; time_cmp(&t->next, &now) < 0; runs++)
t->next = time_add(&t->next, &t->period);
#elif PERIODIC_TASK_IMPL == TIMERFD
int ret;
@ -189,7 +180,7 @@ uint64_t task_wait(struct task *t)
uint64_t now;
do {
now = rdtscp();
now = tsc_now(&t->tsc);
} while (now < t->next);