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Add posix semaphores support

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There's still some bugs to work out on Windows and OpenBSD.
This commit is contained in:
Justine Tunney 2022-10-14 08:25:47 -07:00
parent f52f65b2e3
commit 8111462789
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GPG key ID: BE714B4575D6E328
36 changed files with 779 additions and 59 deletions
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6
libc/thread/thread.h
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@ -200,8 +200,6 @@ void _pthread_cleanup_push(struct _pthread_cleanup_buffer *, void (*)(void *),
_pthread_cleanup_pop(&_buffer, (execute)); \
}
#define pthread_spin_init(pSpin, multiprocess) ((pSpin)->_lock = 0, 0)
#define pthread_spin_destroy(pSpin) ((pSpin)->_lock = -1, 0)
#if (__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 407 && \
!defined(__STRICT_ANSI__)
extern const errno_t EBUSY;
@ -222,6 +220,10 @@ extern const errno_t EBUSY;
pthread_spinlock_t *_s = pSpin; \
__atomic_test_and_set(&_s->_lock, __ATOMIC_ACQUIRE) ? EBUSY : 0; \
})
#define pthread_spin_init(pSpin, multiprocess) \
(__atomic_store_n(&(pSpin)->_lock, 0, __ATOMIC_RELAXED), 0)
#define pthread_spin_destroy(pSpin) \
(__atomic_store_n(&(pSpin)->_lock, -1, __ATOMIC_RELAXED), 0)
#endif /* GCC 4.7+ */
COSMOPOLITAN_C_END_