fusl/src/thread/pthread_rwlock_tryrdlock.c - Issue 1573973002: Add a "fork" of musl as //fusl.

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Side by Side Diff: fusl/src/thread/pthread_rwlock_tryrdlock.c

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master

Patch Set: Created 4 years, 11 months ago

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	1 #include "pthread_impl.h"

	2

	3 int pthread_rwlock_tryrdlock(pthread_rwlock_t *rw)

	4 {

	5 int val, cnt;

	6 do {

	7 val = rw->_rw_lock;

	8 cnt = val & 0x7fffffff;

	9 if (cnt == 0x7fffffff) return EBUSY;

	10 if (cnt == 0x7ffffffe) return EAGAIN;

	11 } while (a_cas(&rw->_rw_lock, val, val+1) != val);

	12 return 0;

	13 }

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