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#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) || \ SYS_semtimedop == SYS_semtimedop_time64 #define NO_TIME32 1 #else #define NO_TIME32 0 #endif int semtimedop(int id, struct sembuf *buf, size_t n, const struct timespec *ts) { #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_ret(-ENOSYS); #endif } |