Last change
on this file since 373 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNLを追加
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File size:
634 bytes
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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 | static void cleanup(void *p)
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5 | {
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6 | a_dec(p);
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7 | }
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8 |
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9 | int sem_timedwait(sem_t *restrict sem, const struct timespec *restrict at)
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10 | {
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11 | pthread_testcancel();
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12 |
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13 | if (!sem_trywait(sem)) return 0;
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14 |
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15 | int spins = 100;
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16 | while (spins-- && sem->__val[0] <= 0 && !sem->__val[1]) a_spin();
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17 |
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18 | while (sem_trywait(sem)) {
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19 | int r;
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20 | a_inc(sem->__val+1);
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21 | a_cas(sem->__val, 0, -1);
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22 | pthread_cleanup_push(cleanup, (void *)(sem->__val+1));
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23 | r = __timedwait_cp(sem->__val, -1, CLOCK_REALTIME, at, sem->__val[2]);
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24 | pthread_cleanup_pop(1);
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25 | if (r && r != EINTR) {
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26 | errno = r;
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27 | return -1;
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28 | }
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29 | }
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30 | return 0;
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31 | }
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