diff options
Diffstat (limited to 'src/ipc/semtimedop.c')
| -rw-r--r-- | src/ipc/semtimedop.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/src/ipc/semtimedop.c b/src/ipc/semtimedop.c index 51e70805..1632e7b0 100644 --- a/src/ipc/semtimedop.c +++ b/src/ipc/semtimedop.c @@ -1,13 +1,35 @@ #define _GNU_SOURCE #include <sys/sem.h> +#include <errno.h> #include "syscall.h" #include "ipc.h" +#define IS32BIT(x) !((x)+0x80000000ULL>>32) +#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63)) + +#if !defined(SYS_semtimedop) && !defined(SYS_ipc) +#define NO_TIME32 1 +#else +#define NO_TIME32 0 +#endif + int semtimedop(int id, struct sembuf *buf, size_t n, const struct timespec *ts) { -#ifndef SYS_ipc +#ifdef SYS_semtimedop_time64 + time_t s = ts ? ts->tv_sec : 0; + long ns = ts ? ts->tv_nsec : 0; + int r = -ENOSYS; + if (NO_TIME32 || !IS32BIT(s)) + r = __syscall(SYS_semtimedop_time64, id, buf, n, + ts ? ((long long[]){s, ns}) : 0); + if (NO_TIME32 || r!=-ENOSYS) return __syscall_ret(r); + ts = ts ? (void *)(long[]){CLAMP(s), ns} : 0; +#endif +#if defined(SYS_ipc) + return syscall(SYS_ipc, IPCOP_semtimedop, id, n, 0, buf, ts); +#elif defined(SYS_semtimedop) return syscall(SYS_semtimedop, id, buf, n, ts); #else - return syscall(SYS_ipc, IPCOP_semtimedop, id, n, 0, buf, ts); + return __syscall_ret(-ENOSYS); #endif } |