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 #include <ldap_cdefs.h>
  18
  19 LDAP_BEGIN_DECL
  20
  21 typedef struct rdwr_var {
  22         int readers_reading;
  23         int writer_writing;
  24         pthread_mutex_t mutex;
  25         pthread_cond_t lock_free;
  26 } pthread_rdwr_t;
  27
  28 typedef void * pthread_rdwrattr_t;
  29
  30 #define pthread_rdwrattr_default NULL;
  31
  32 LDAP_F int pthread_rdwr_init_np LDAP_P((pthread_rdwr_t *rdwrp, pthread_rdwrattr_t *attrp));
  33 LDAP_F int pthread_rdwr_rlock_np LDAP_P((pthread_rdwr_t *rdwrp));
  34 LDAP_F int pthread_rdwr_runlock_np LDAP_P((pthread_rdwr_t *rdwrp));
  35 LDAP_F int pthread_rdwr_wlock_np LDAP_P((pthread_rdwr_t *rdwrp));
  36 LDAP_F int pthread_rdwr_wunlock_np LDAP_P((pthread_rdwr_t *rdwrp));
  37
  38 #ifdef LDAP_DEBUG
  39 LDAP_F int pthread_rdwr_rchk_np LDAP_P((pthread_rdwr_t *rdwrp));
  40 LDAP_F int pthread_rdwr_wchk_np LDAP_P((pthread_rdwr_t *rdwrp));
  41 LDAP_F int pthread_rdwr_rwchk_np LDAP_P((pthread_rdwr_t *rdwrp));
  42 #endif /* LDAP_DEBUG */
  43
  44 LDAP_END_DECL
  45
  46 #endif /* _LTHREAD_RDWR_H */