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| | #include <time.h>
#include <errno.h>
#include <stdint.h>
#include "syscall.h"
#include "libc.h"
#include "atomic.h"
static int sc_clock_gettime(clockid_t clk, struct timespec *ts)
{
int r = __syscall(SYS_clock_gettime, clk, ts);
if (!r) return r;
if (r == -ENOSYS) {
if (clk == CLOCK_REALTIME) {
__syscall(SYS_gettimeofday, ts, 0);
ts->tv_nsec = (int)ts->tv_nsec * 1000;
return 0;
}
r = -EINVAL;
}
errno = -r;
return -1;
}
void *__vdsosym(const char *, const char *);
int __clock_gettime(clockid_t clk, struct timespec *ts)
{
#ifdef VDSO_CGT_SYM
int r;
static int (*volatile cgt)(clockid_t, struct timespec *);
if (!cgt) {
void *f = __vdsosym(VDSO_CGT_VER, VDSO_CGT_SYM);
if (!f) f = (void *)sc_clock_gettime;
a_cas_p(&cgt, 0, f);
}
r = cgt(clk, ts);
/* In case an error occurred try the normal syscall */
if (!r) return r;
#endif
return sc_clock_gettime(clk, ts);
}
weak_alias(__clock_gettime, clock_gettime);
|