diff options
Diffstat (limited to 'src/thread/pthread_mutex_timedlock.c')
| -rw-r--r-- | src/thread/pthread_mutex_timedlock.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/thread/pthread_mutex_timedlock.c b/src/thread/pthread_mutex_timedlock.c index 6b893627..9279fc54 100644 --- a/src/thread/pthread_mutex_timedlock.c +++ b/src/thread/pthread_mutex_timedlock.c @@ -1,5 +1,23 @@ #include "pthread_impl.h" +#define IS32BIT(x) !((x)+0x80000000ULL>>32) +#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63)) + +static int __futex4(volatile void *addr, int op, int val, const struct timespec *to) +{ +#ifdef SYS_futex_time64 + time_t s = to ? to->tv_sec : 0; + long ns = to ? to->tv_nsec : 0; + int r = -ENOSYS; + if (SYS_futex == SYS_futex_time64 || !IS32BIT(s)) + r = __syscall(SYS_futex_time64, addr, op, val, + to ? ((long long[]){s, ns}) : 0); + if (SYS_futex == SYS_futex_time64 || r!=-ENOSYS) return r; + to = to ? (void *)(long[]){CLAMP(s), ns} : 0; +#endif + return __syscall(SYS_futex, addr, op, val, to); +} + static int pthread_mutex_timedlock_pi(pthread_mutex_t *restrict m, const struct timespec *restrict at) { int type = m->_m_type; @@ -9,7 +27,7 @@ static int pthread_mutex_timedlock_pi(pthread_mutex_t *restrict m, const struct if (!priv) self->robust_list.pending = &m->_m_next; - do e = -__syscall(SYS_futex, &m->_m_lock, FUTEX_LOCK_PI|priv, 0, at); + do e = -__futex4(&m->_m_lock, FUTEX_LOCK_PI|priv, 0, at); while (e==EINTR); if (e) self->robust_list.pending = 0; |