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
semtimedop(int id,struct sembuf * buf,size_t n,const struct timespec * ts)17 int 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 }
37