source: asp3_tinet_ecnl_arm/trunk/musl-1.1.18/src/thread/pthread_rwlock_timedwrlock.c@ 352

Last change on this file since 352 was 352, checked in by coas-nagasima, 6 years ago

arm向けASP3版ECNLを追加
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  • Property svn:mime-type set to text/x-csrc;charset=UTF-8
File size: 604 bytes
Line 
1#include "pthread_impl.h"
2
3int pthread_rwlock_timedwrlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at)
4{
5 int r, t;
6
7 r = pthread_rwlock_trywrlock(rw);
8 if (r != EBUSY) return r;
9
10 int spins = 100;
11 while (spins-- && rw->_rw_lock && !rw->_rw_waiters) a_spin();
12
13 while ((r=pthread_rwlock_trywrlock(rw))==EBUSY) {
14 if (!(r=rw->_rw_lock)) continue;
15 t = r | 0x80000000;
16 a_inc(&rw->_rw_waiters);
17 a_cas(&rw->_rw_lock, r, t);
18 r = __timedwait(&rw->_rw_lock, t, CLOCK_REALTIME, at, rw->_rw_shared^128);
19 a_dec(&rw->_rw_waiters);
20 if (r && r != EINTR) return r;
21 }
22 return r;
23}
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