Last change
on this file was 389, checked in by coas-nagasima, 5 years ago |
ビルドが通るよう更新
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File size:
404 bytes
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[388] | 1 | #include "pthread_impl.h"
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| 2 |
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| 3 | int pthread_rwlock_unlock(pthread_rwlock_t *rw)
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| 4 | {
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| 5 | int val, cnt, waiters, new, priv = rw->_rw_shared^128;
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| 6 |
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| 7 | do {
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| 8 | val = rw->_rw_lock;
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| 9 | cnt = val & 0x7fffffff;
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| 10 | waiters = rw->_rw_waiters;
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| 11 | new = (cnt == 0x7fffffff || cnt == 1) ? 0 : val-1;
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| 12 | } while (a_cas(&rw->_rw_lock, val, new) != val);
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| 13 |
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| 14 | if (!new && (waiters || val<0))
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| 15 | __wake(&rw->_rw_lock, cnt, priv);
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| 16 |
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| 17 | return 0;
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| 18 | }
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