1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
| | #include <time.h>
#include <errno.h>
#include "syscall.h"
#define IS32BIT(x) !((x)+0x80000000ULL>>32)
#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
int __clock_nanosleep(clockid_t clk, int flags, const struct timespec *req, struct timespec *rem)
{
if (clk == CLOCK_THREAD_CPUTIME_ID) return EINVAL;
#ifdef SYS_clock_nanosleep_time64
static int use_clock_nanosleep_time64 = 1;
time_t s = req->tv_sec;
long ns = req->tv_nsec;
int r = -ENOSYS;
if (use_clock_nanosleep_time64) {
if (SYS_clock_nanosleep == SYS_clock_nanosleep_time64 || !IS32BIT(s))
r = __syscall_cp(SYS_clock_nanosleep_time64, clk, flags,
((long long[]){s, ns}), rem);
if (SYS_clock_nanosleep == SYS_clock_nanosleep_time64 || r!=-ENOSYS)
return -r;
else use_clock_nanosleep_time64 = 0;
}
long long extra = s - CLAMP(s);
long ts32[2] = { CLAMP(s), ns };
if (clk == CLOCK_REALTIME && !flags)
r = __syscall_cp(SYS_nanosleep, &ts32, &ts32);
else
r = __syscall_cp(SYS_clock_nanosleep, clk, flags, &ts32, &ts32);
if (r==-EINTR && rem && !(flags & TIMER_ABSTIME)) {
rem->tv_sec = ts32[0] + extra;
rem->tv_nsec = ts32[1];
}
return -r;
#else
if (clk == CLOCK_REALTIME && !flags)
return -__syscall_cp(SYS_nanosleep, req, rem);
return -__syscall_cp(SYS_clock_nanosleep, clk, flags, req, rem);
#endif
}
weak_alias(__clock_nanosleep, clock_nanosleep);
|