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