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Provide reentrant versions of cgsleep functions to allow start time to be set separately from the beginning of the actual sleep, allowing scheduling delays to be counted in the sleep.

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This commit is contained in:
Con Kolivas 2013-08-18 10:49:52 +10:00
parent 0b5edb24f9
commit 621eb00309
2 changed files with 35 additions and 0 deletions
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32
util.c
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@ -911,6 +911,38 @@ void cgsleep_us(int64_t us)
} while (ret == EINTR);
}
/* Reentrant version of cgsleep functions allow start time to be set separately
* from the beginning of the actual sleep, allowing scheduling delays to be
* counted in the sleep. */
void cgsleep_prepare_r(struct timespec *ts_start)
{
clock_gettime(CLOCK_MONOTONIC, ts_start);
}
void cgsleep_ms_r(struct timespec *ts_start, int ms)
{
struct timespec ts_end;
int ret;
ms_to_timespec(&ts_end, ms);
timeraddspec(&ts_end, ts_start);
do {
ret = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts_end, NULL);
} while (ret == EINTR);
}
void cgsleep_us_r(struct timespec *ts_start, int us)
{
struct timespec ts_end;
int ret;
us_to_timespec(&ts_end, us);
timeraddspec(&ts_end, ts_start);
do {
ret = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts_end, NULL);
} while (ret == EINTR);
}
/* Provide a ms based sleep that uses nanosleep to avoid poor usleep accuracy
* on SMP machines */
void nmsleep(unsigned int msecs)

3
util.h
View File

@ -86,6 +86,9 @@ void ms_to_timespec(struct timespec *spec, int64_t ms);
void timeraddspec(struct timespec *a, const struct timespec *b);
void cgsleep_ms(int ms);
void cgsleep_us(int64_t us);
void cgsleep_prepare_r(struct timespec *ts_start);
void cgsleep_ms_r(struct timespec *ts_start, int ms);
void cgsleep_us_r(struct timespec *ts_start, int us);
double us_tdiff(struct timeval *end, struct timeval *start);
double tdiff(struct timeval *end, struct timeval *start);
bool stratum_send(struct pool *pool, char *s, ssize_t len);