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
set to
native
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Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
254 bytes
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Line | |
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1 | #include <semaphore.h>
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2 | #include "pthread_impl.h"
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3 |
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4 | int sem_trywait(sem_t *sem)
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5 | {
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6 | int val;
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7 | while ((val=sem->__val[0]) > 0) {
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8 | int new = val-1-(val==1 && sem->__val[1]);
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9 | if (a_cas(sem->__val, val, new)==val) return 0;
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10 | }
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11 | errno = EAGAIN;
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12 | return -1;
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13 | }
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