From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/select/ppoll.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/select/ppoll.c (limited to 'src/select/ppoll.c') diff --git a/src/select/ppoll.c b/src/select/ppoll.c new file mode 100644 index 0000000..9a0bf92 --- /dev/null +++ b/src/select/ppoll.c @@ -0,0 +1,26 @@ +#define _BSD_SOURCE +#include +#include +#include +#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); +} -- cgit v1.2.3