Last change
on this file since 403 was 400, checked in by coas-nagasima, 5 years ago |
ファイルヘッダーの更新
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File size:
1006 bytes
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1 | #include "pthread_impl.h"
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2 |
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3 | int __pthread_mutex_unlock(pthread_mutex_t *m)
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4 | {
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5 | pthread_t self;
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6 | int waiters = m->_m_waiters;
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7 | int cont;
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8 | int type = m->_m_type & 15;
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9 | int priv = (m->_m_type & 128) ^ 128;
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10 |
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11 | if (type != PTHREAD_MUTEX_NORMAL) {
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12 | self = __pthread_self();
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13 | if ((m->_m_lock&0x7fffffff) != self->tid)
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14 | return EPERM;
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15 | if ((type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
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16 | return m->_m_count--, 0;
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17 | if (!priv) {
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18 | self->robust_list.pending = &m->_m_next;
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19 | __vm_lock();
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20 | }
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21 | volatile void *prev = m->_m_prev;
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22 | volatile void *next = m->_m_next;
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23 | *(volatile void *volatile *)prev = next;
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24 | if (next != &self->robust_list.head) *(volatile void *volatile *)
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25 | ((char *)next - sizeof(void *)) = prev;
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26 | }
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27 | cont = a_swap(&m->_m_lock, (type & 8) ? 0x7fffffff : 0);
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28 | if (type != PTHREAD_MUTEX_NORMAL && !priv) {
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29 | self->robust_list.pending = 0;
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30 | __vm_unlock();
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31 | }
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32 | if (waiters || cont<0)
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33 | __wake(&m->_m_lock, 1, priv);
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34 | return 0;
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35 | }
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36 |
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37 | weak_alias(__pthread_mutex_unlock, pthread_mutex_unlock);
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