text: #ifndef __PTHREAD_H
  #define __PTHREAD_H
  
  typedef int pthread_rwlock_t;
  
  #define PTHREAD_RWLOCK_INITIALIZER 0
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  inline int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
    { return 0; }
  inline int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
    { return 0; }
  inline int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
    { return 0; }
  inline int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
    { return 0; }
  int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
    { return 0; }
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __PTHREAD_H */
  