Last change
on this file since 445 was 444, checked in by coas-nagasima, 4 years ago |
muslのソースコードを追加
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Property svn:eol-style
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Property svn:mime-type
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File size:
633 bytes
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[444] | 1 | #include "pthread_impl.h"
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| 2 |
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| 3 | int pthread_rwlock_timedrdlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at)
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| 4 | {
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| 5 | int r, t;
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| 6 |
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| 7 | r = pthread_rwlock_tryrdlock(rw);
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| 8 | if (r != EBUSY) return r;
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| 9 |
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| 10 | int spins = 100;
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| 11 | while (spins-- && rw->_rw_lock && !rw->_rw_waiters) a_spin();
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| 12 |
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| 13 | while ((r=pthread_rwlock_tryrdlock(rw))==EBUSY) {
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| 14 | if (!(r=rw->_rw_lock) || (r&0x7fffffff)!=0x7fffffff) continue;
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| 15 | t = r | 0x80000000;
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| 16 | a_inc(&rw->_rw_waiters);
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| 17 | a_cas(&rw->_rw_lock, r, t);
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| 18 | r = __timedwait(&rw->_rw_lock, t, CLOCK_REALTIME, at, rw->_rw_shared^128);
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| 19 | a_dec(&rw->_rw_waiters);
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| 20 | if (r && r != EINTR) return r;
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| 21 | }
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| 22 | return r;
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| 23 | }
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