zircon/third_party/ulib/musl/pthread/pthread_mutex_lock.c

#include "atomic.h"
#include "threads_impl.h"

int pthread_mutex_lock(pthread_mutex_t* m) {
  int type = pthread_mutex_get_type(m);

  if (type == PTHREAD_MUTEX_NORMAL &&
      !a_cas_shim(&m->_m_lock, 0, pthread_mutex_tid_to_uncontested_state(__thread_get_tid())))
    return 0;

  return pthread_mutex_timedlock(m, 0);
}