diff options
Diffstat (limited to 'libc-top-half/musl/src/linux/ppoll.c')
-rw-r--r-- | libc-top-half/musl/src/linux/ppoll.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/linux/ppoll.c b/libc-top-half/musl/src/linux/ppoll.c new file mode 100644 index 0000000..e614600 --- /dev/null +++ b/libc-top-half/musl/src/linux/ppoll.c @@ -0,0 +1,26 @@ +#define _GNU_SOURCE +#include <poll.h> +#include <signal.h> +#include <errno.h> +#include "syscall.h" + +#define IS32BIT(x) !((x)+0x80000000ULL>>32) +#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63)) + +int ppoll(struct pollfd *fds, nfds_t n, const struct timespec *to, const sigset_t *mask) +{ + time_t s = to ? to->tv_sec : 0; + long ns = to ? to->tv_nsec : 0; +#ifdef SYS_ppoll_time64 + int r = -ENOSYS; + if (SYS_ppoll == SYS_ppoll_time64 || !IS32BIT(s)) + r = __syscall_cp(SYS_ppoll_time64, fds, n, + to ? ((long long[]){s, ns}) : 0, + mask, _NSIG/8); + if (SYS_ppoll == SYS_ppoll_time64 || r != -ENOSYS) + return __syscall_ret(r); + s = CLAMP(s); +#endif + return syscall_cp(SYS_ppoll, fds, n, + to ? ((long[]){s, ns}) : 0, mask, _NSIG/8); +} |