Last change
on this file since 403 was 337, checked in by coas-nagasima, 6 years ago |
ASP3版ECNL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:
915 bytes
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1 | #include "pthread_impl.h"
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2 |
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3 | int __pthread_mutex_timedlock(pthread_mutex_t *restrict m, const struct timespec *restrict at)
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4 | {
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5 | if ((m->_m_type&15) == PTHREAD_MUTEX_NORMAL
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6 | && !a_cas(&m->_m_lock, 0, EBUSY))
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7 | return 0;
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8 |
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9 | int r, t, priv = (m->_m_type & 128) ^ 128;
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10 |
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11 | r = pthread_mutex_trylock(m);
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12 | if (r != EBUSY) return r;
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13 |
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14 | int spins = 100;
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15 | while (spins-- && m->_m_lock && !m->_m_waiters) a_spin();
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16 |
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17 | while ((r=pthread_mutex_trylock(m)) == EBUSY) {
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18 | if (!(r=m->_m_lock) || ((r&0x40000000) && (m->_m_type&4)))
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19 | continue;
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20 | if ((m->_m_type&3) == PTHREAD_MUTEX_ERRORCHECK
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21 | && (r&0x7fffffff) == __pthread_self()->tid)
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22 | return EDEADLK;
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23 |
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24 | a_inc(&m->_m_waiters);
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25 | t = r | 0x80000000;
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26 | a_cas(&m->_m_lock, r, t);
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27 | r = __timedwait(&m->_m_lock, t, CLOCK_REALTIME, at, priv);
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28 | a_dec(&m->_m_waiters);
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29 | if (r && r != EINTR) break;
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30 | }
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31 | return r;
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32 | }
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33 |
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34 | weak_alias(__pthread_mutex_timedlock, pthread_mutex_timedlock);
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