1570af302Sopenharmony_ci#include "pthread_impl.h" 2570af302Sopenharmony_ci 3570af302Sopenharmony_ciint __pthread_rwlock_unlock(pthread_rwlock_t *rw) 4570af302Sopenharmony_ci{ 5570af302Sopenharmony_ci int val, cnt, waiters, new, priv = rw->_rw_shared^128; 6570af302Sopenharmony_ci 7570af302Sopenharmony_ci do { 8570af302Sopenharmony_ci val = rw->_rw_lock; 9570af302Sopenharmony_ci cnt = val & 0x7fffffff; 10570af302Sopenharmony_ci waiters = rw->_rw_waiters; 11570af302Sopenharmony_ci new = (cnt == 0x7fffffff || cnt == 1) ? 0 : val-1; 12570af302Sopenharmony_ci } while (a_cas(&rw->_rw_lock, val, new) != val); 13570af302Sopenharmony_ci 14570af302Sopenharmony_ci if (!new && (waiters || val<0)) 15570af302Sopenharmony_ci __wake(&rw->_rw_lock, cnt, priv); 16570af302Sopenharmony_ci 17570af302Sopenharmony_ci return 0; 18570af302Sopenharmony_ci} 19570af302Sopenharmony_ci 20570af302Sopenharmony_ciweak_alias(__pthread_rwlock_unlock, pthread_rwlock_unlock); 21