1#define _GNU_SOURCE
 2#include <sys/sem.h>
 3#include <errno.h>
 4#include "syscall.h"
 5#include "ipc.h"
 6
 7#define IS32BIT(x) !((x)+0x80000000ULL>>32)
 8#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
 9
10#if !defined(SYS_semtimedop) && !defined(SYS_ipc) || \
11	SYS_semtimedop == SYS_semtimedop_time64
12#define NO_TIME32 1
13#else
14#define NO_TIME32 0
15#endif
16
17int semtimedop(int id, struct sembuf *buf, size_t n, const struct timespec *ts)
18{
19#ifdef SYS_semtimedop_time64
20	time_t s = ts ? ts->tv_sec : 0;
21	long ns = ts ? ts->tv_nsec : 0;
22	int r = -ENOSYS;
23	if (NO_TIME32 || !IS32BIT(s))
24		r = __syscall(SYS_semtimedop_time64, id, buf, n,
25			ts ? ((long long[]){s, ns}) : 0);
26	if (NO_TIME32 || r!=-ENOSYS) return __syscall_ret(r);
27	ts = ts ? (void *)(long[]){CLAMP(s), ns} : 0;
28#endif
29#if defined(SYS_ipc)
30	return syscall(SYS_ipc, IPCOP_semtimedop, id, n, 0, buf, ts);
31#elif defined(SYS_semtimedop)
32	return syscall(SYS_semtimedop, id, buf, n, ts);
33#else
34	return __syscall_ret(-ENOSYS);
35#endif
36}