github.com/afumu/libc@v0.0.6/musl/src/linux/ppoll.c (about) 1 #define _GNU_SOURCE 2 #include <poll.h> 3 #include <signal.h> 4 #include <errno.h> 5 #include "syscall.h" 6 7 #define IS32BIT(x) !((x)+0x80000000ULL>>32) 8 #define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63)) 9 10 int ppoll(struct pollfd *fds, nfds_t n, const struct timespec *to, const sigset_t *mask) 11 { 12 time_t s = to ? to->tv_sec : 0; 13 long ns = to ? to->tv_nsec : 0; 14 #ifdef SYS_ppoll_time64 15 int r = -ENOSYS; 16 if (SYS_ppoll == SYS_ppoll_time64 || !IS32BIT(s)) 17 r = __syscall_cp(SYS_ppoll_time64, fds, n, 18 to ? ((long long[]){s, ns}) : 0, 19 mask, _NSIG/8); 20 if (SYS_ppoll == SYS_ppoll_time64 || r != -ENOSYS) 21 return __syscall_ret(r); 22 s = CLAMP(s); 23 #endif 24 return syscall_cp(SYS_ppoll, fds, n, 25 to ? ((long[]){s, ns}) : 0, mask, _NSIG/8); 26 }