overhaul internally-public declarations using wrapper headers
[musl] / src / thread / __timedwait.c
1 #include <pthread.h>
2 #include <time.h>
3 #include <errno.h>
4 #include "futex.h"
5 #include "syscall.h"
6 #include "pthread_impl.h"
7
8 int __timedwait_cp(volatile int *addr, int val,
9         clockid_t clk, const struct timespec *at, int priv)
10 {
11         int r;
12         struct timespec to, *top=0;
13
14         if (priv) priv = FUTEX_PRIVATE;
15
16         if (at) {
17                 if (at->tv_nsec >= 1000000000UL) return EINVAL;
18                 if (__clock_gettime(clk, &to)) return EINVAL;
19                 to.tv_sec = at->tv_sec - to.tv_sec;
20                 if ((to.tv_nsec = at->tv_nsec - to.tv_nsec) < 0) {
21                         to.tv_sec--;
22                         to.tv_nsec += 1000000000;
23                 }
24                 if (to.tv_sec < 0) return ETIMEDOUT;
25                 top = &to;
26         }
27
28         r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT|priv, val, top);
29         if (r == ENOSYS) r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT, val, top);
30         if (r != EINTR && r != ETIMEDOUT && r != ECANCELED) r = 0;
31
32         return r;
33 }
34
35 int __timedwait(volatile int *addr, int val,
36         clockid_t clk, const struct timespec *at, int priv)
37 {
38         int cs, r;
39         __pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
40         r = __timedwait_cp(addr, val, clk, at, priv);
41         __pthread_setcancelstate(cs, 0);
42         return r;
43 }