git.sur5r.net Git - openldap/blob - include/lthread_rdwr.h

   1 #ifndef _LTHREAD_RDWR_H
   2 #define _LTHREAD_RDWR_H 1
   3
   4 /********************************************************
   5  * An example source module to accompany...
   6  *
   7  * "Using POSIX Threads: Programming with Pthreads"
   8  *     by Brad nichols, Dick Buttlar, Jackie Farrell
   9  *     O'Reilly & Associates, Inc.
  10  *
  11  ********************************************************
  12  *
  13  * Include file for reader/writer locks
  14  *
  15  */
  16
  17 typedef struct rdwr_var {
  18         int readers_reading;
  19         int writer_writing;
  20         pthread_mutex_t mutex;
  21         pthread_cond_t lock_free;
  22 } pthread_rdwr_t;
  23
  24 typedef void * pthread_rdwrattr_t;
  25
  26 #define pthread_rdwrattr_default NULL;
  27
  28 int pthread_rdwr_init_np(pthread_rdwr_t *rdwrp, pthread_rdwrattr_t *attrp);
  29 int pthread_rdwr_rlock_np(pthread_rdwr_t *rdwrp);
  30 int pthread_rdwr_runlock_np(pthread_rdwr_t *rdwrp);
  31 int pthread_rdwr_wlock_np(pthread_rdwr_t *rdwrp);
  32 int pthread_rdwr_wunlock_np(pthread_rdwr_t *rdwrp);
  33
  34 #ifdef LDAP_DEBUG
  35 int pthread_rdwr_rchk_np(pthread_rdwr_t *rdwrp);
  36 int pthread_rdwr_wchk_np(pthread_rdwr_t *rdwrp);
  37 int pthread_rdwr_rwchk_np(pthread_rdwr_t *rdwrp);
  38 #endif /* LDAP_DEBUG */
  39
  40 #endif /* _LTHREAD_RDWR_H */