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#include "pthread_impl.h"
#include <threads.h>
int mtx_lock(mtx_t *m)
{
if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_cas(&m->_m_lock, 0, EBUSY))
return thrd_success;
/* Calling mtx_timedlock with a null pointer is an extension.
* It is convenient, here to avoid duplication of the logic
* for return values. */
return mtx_timedlock(m, 0);
}
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