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add C11 timespec_get function, with associated time.h changes for C11

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based on patch by Jens Gustedt for inclusion with C11 threads
implementation, but committed separately since it's independent of
threads.
This commit is contained in:
Rich Felker 2014-09-06 12:58:09 -04:00
parent 86876dbec5
commit 6eb19505bc
2 changed files with 15 additions and 1 deletions
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4
include/time.h
View File

@ -17,11 +17,11 @@ extern "C" {
#define __NEED_size_t
#define __NEED_time_t
#define __NEED_clock_t
#define __NEED_struct_timespec
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
|| defined(_BSD_SOURCE)
#define __NEED_struct_timespec
#define __NEED_clockid_t
#define __NEED_timer_t
#define __NEED_pid_t
@ -59,9 +59,11 @@ struct tm *gmtime (const time_t *);
struct tm *localtime (const time_t *);
char *asctime (const struct tm *);
char *ctime (const time_t *);
int timespec_get(struct timespec *, int);
#define CLOCKS_PER_SEC 1000000L
#define TIME_UTC 1
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \

12
src/time/timespec_get.c Normal file
View File

@ -0,0 +1,12 @@
#include <time.h>
int __clock_gettime(clockid_t, struct timespec *);
/* There is no other implemented value than TIME_UTC; all other values
* are considered erroneous. */
int timespec_get(struct timespec * ts, int base)
{
if (base != TIME_UTC) return 0;
int ret = __clock_gettime(CLOCK_REALTIME, ts);
return ret < 0 ? 0 : base;
}