diff options
Diffstat (limited to 'src/signal/sigtimedwait.c')
| -rw-r--r-- | src/signal/sigtimedwait.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/src/signal/sigtimedwait.c b/src/signal/sigtimedwait.c index 7bcfe720..1287174e 100644 --- a/src/signal/sigtimedwait.c +++ b/src/signal/sigtimedwait.c @@ -2,11 +2,31 @@ #include <errno.h> #include "syscall.h" +#define IS32BIT(x) !((x)+0x80000000ULL>>32) +#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63)) + +static int do_sigtimedwait(const sigset_t *restrict mask, siginfo_t *restrict si, const struct timespec *restrict ts) +{ +#ifdef SYS_rt_sigtimedwait_time64 + time_t s = ts ? ts->tv_sec : 0; + long ns = ts ? ts->tv_nsec : 0; + int r = -ENOSYS; + if (SYS_rt_sigtimedwait == SYS_rt_sigtimedwait_time64 || !IS32BIT(s)) + r = __syscall_cp(SYS_rt_sigtimedwait_time64, mask, si, + ts ? ((long long[]){s, ns}) : 0, _NSIG/8); + if (SYS_rt_sigtimedwait == SYS_rt_sigtimedwait_time64 || r!=-ENOSYS) + return r; + return __syscall_cp(SYS_rt_sigtimedwait, mask, si, + ts ? ((long[]){CLAMP(s), ns}) : 0, _NSIG/8);; +#else + return __syscall_cp(SYS_rt_sigtimedwait, mask, si, ts, _NSIG/8); +#endif +} + int sigtimedwait(const sigset_t *restrict mask, siginfo_t *restrict si, const struct timespec *restrict timeout) { int ret; - do ret = syscall_cp(SYS_rt_sigtimedwait, mask, - si, timeout, _NSIG/8); - while (ret<0 && errno==EINTR); - return ret; + do ret = do_sigtimedwait(mask, si, timeout); + while (ret==-EINTR); + return __syscall_ret(ret); } |