openldap/include/lthread_rdwr.h
1998-10-25 01:41:42 +00:00

47 lines
1.3 KiB
C

#ifndef _LTHREAD_RDWR_H
#define _LTHREAD_RDWR_H 1
/********************************************************
* An example source module to accompany...
*
* "Using POSIX Threads: Programming with Pthreads"
* by Brad nichols, Dick Buttlar, Jackie Farrell
* O'Reilly & Associates, Inc.
*
********************************************************
*
* Include file for reader/writer locks
*
*/
#include <ldap_cdefs.h>
LDAP_BEGIN_DECL
typedef struct rdwr_var {
int readers_reading;
int writer_writing;
pthread_mutex_t mutex;
pthread_cond_t lock_free;
} pthread_rdwr_t;
typedef void * pthread_rdwrattr_t;
#define pthread_rdwrattr_default NULL;
LDAP_F int pthread_rdwr_init_np LDAP_P((pthread_rdwr_t *rdwrp, pthread_rdwrattr_t *attrp));
LDAP_F int pthread_rdwr_rlock_np LDAP_P((pthread_rdwr_t *rdwrp));
LDAP_F int pthread_rdwr_runlock_np LDAP_P((pthread_rdwr_t *rdwrp));
LDAP_F int pthread_rdwr_wlock_np LDAP_P((pthread_rdwr_t *rdwrp));
LDAP_F int pthread_rdwr_wunlock_np LDAP_P((pthread_rdwr_t *rdwrp));
#ifdef LDAP_DEBUG
LDAP_F int pthread_rdwr_rchk_np LDAP_P((pthread_rdwr_t *rdwrp));
LDAP_F int pthread_rdwr_wchk_np LDAP_P((pthread_rdwr_t *rdwrp));
LDAP_F int pthread_rdwr_rwchk_np LDAP_P((pthread_rdwr_t *rdwrp));
#endif /* LDAP_DEBUG */
LDAP_END_DECL
#endif /* _LTHREAD_RDWR_H */