mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-21 03:10:25 +08:00
366701bdf7
okay to read and write LDBM specific fields (state, refcnt, LRU. The id field, though is read-only once set. cache_find_entry_dn2id(), hence, does not require any entry locks. cache_find_entry_id() must do a entry_rdwr_trylock() and back off if busy. Add new rdwr lock code with trylock() functionality. Implement entry_rdwr_trylock().
281 lines
6.8 KiB
C
281 lines
6.8 KiB
C
/*
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* Copyright 1998,1999 The OpenLDAP Foundation, Redwood City, California, USA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted only
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* as authorized by the OpenLDAP Public License. A copy of this
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* license is available at http://www.OpenLDAP.org/license.html or
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* in file LICENSE in the top-level directory of the distribution.
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*/
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/* ldap_pvt_thread.h - ldap threads header file NG */
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#ifndef _LDAP_PVT_THREAD_H
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#define _LDAP_PVT_THREAD_H
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#include "ldap_cdefs.h"
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#if defined( HAVE_PTHREADS )
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/**********************************
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* *
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* definitions for POSIX Threads *
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* *
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**********************************/
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#include <pthread.h>
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#ifdef HAVE_SCHED_H
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#include <sched.h>
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#endif
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LDAP_BEGIN_DECL
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typedef pthread_t ldap_pvt_thread_t;
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typedef pthread_mutex_t ldap_pvt_thread_mutex_t;
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typedef pthread_cond_t ldap_pvt_thread_cond_t;
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#if defined( _POSIX_REENTRANT_FUNCTIONS ) || \
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defined( _POSIX_THREAD_SAFE_FUNCTIONS ) || \
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defined( _POSIX_THREADSAFE_FUNCTIONS )
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#define HAVE_REENTRANT_FUNCTIONS 1
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#endif
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#if defined( HAVE_PTHREAD_GETCONCURRENCY ) || \
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defined( HAVE_THR_GETCONCURRENCY )
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#define HAVE_GETCONCURRENCY 1
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#endif
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#if defined( HAVE_PTHREAD_SETCONCURRENCY ) || \
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defined( HAVE_THR_SETCONCURRENCY )
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#define HAVE_SETCONCURRENCY 1
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#endif
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LDAP_END_DECL
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#elif defined ( HAVE_MACH_CTHREADS )
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/**********************************
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* *
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* definitions for Mach CThreads *
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* *
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**********************************/
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#include <mach/cthreads.h>
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LDAP_BEGIN_DECL
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typedef cthread_t ldap_pvt_thread_t;
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typedef struct mutex ldap_pvt_thread_mutex_t;
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typedef struct condition ldap_pvt_thread_cond_t;
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LDAP_END_DECL
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#elif defined( HAVE_THR )
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/********************************************
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* *
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* thread definitions for Solaris LWP (THR) *
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* *
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********************************************/
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#include <thread.h>
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#include <synch.h>
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LDAP_BEGIN_DECL
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typedef thread_t ldap_pvt_thread_t;
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typedef mutex_t ldap_pvt_thread_mutex_t;
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typedef cond_t ldap_pvt_thread_cond_t;
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#define HAVE_REENTRANT_FUNCTIONS 1
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#ifdef HAVE_THR_GETCONCURRENCY
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#define HAVE_GETCONCURRENCY 1
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#endif
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#ifdef HAVE_THR_SETCONCURRENCY
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#define HAVE_SETCONCURRENCY 1
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#endif
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LDAP_END_DECL
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#elif defined( HAVE_LWP )
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/*************************************
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* *
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* thread definitions for SunOS LWP *
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* *
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*************************************/
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#include <lwp/lwp.h>
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#include <lwp/stackdep.h>
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LDAP_BEGIN_DECL
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typedef thread_t ldap_pvt_thread_t;
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typedef mon_t ldap_pvt_thread_mutex_t;
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struct lwpcv {
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int lcv_created;
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cv_t lcv_cv;
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};
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typedef struct lwpcv ldap_pvt_thread_cond_t;
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#define HAVE_REENTRANT_FUNCTIONS 1
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LDAP_END_DECL
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#elif HAVE_NT_THREADS
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#include <windows.h>
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#include <process.h>
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LDAP_BEGIN_DECL
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typedef HANDLE ldap_pvt_thread_t;
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typedef HANDLE ldap_pvt_thread_mutex_t;
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typedef HANDLE ldap_pvt_thread_cond_t;
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LDAP_END_DECL
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#else
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/***********************************
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* *
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* thread definitions for no *
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* underlying library support *
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* *
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***********************************/
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LDAP_BEGIN_DECL
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#ifndef NO_THREADS
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#define NO_THREADS 1
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#endif
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typedef int ldap_pvt_thread_t;
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typedef int ldap_pvt_thread_mutex_t;
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typedef int ldap_pvt_thread_cond_t;
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LDAP_END_DECL
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#endif /* no threads support */
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#ifndef NO_THREADS
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# define HAVE_THREADS 1
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#endif
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LDAP_BEGIN_DECL
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LDAP_F int
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ldap_pvt_thread_initialize LDAP_P(( void ));
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LDAP_F unsigned int
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ldap_pvt_thread_sleep LDAP_P(( unsigned int s ));
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#ifdef HAVE_GETCONCURRENCY
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LDAP_F int
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ldap_pvt_thread_get_concurrency LDAP_P(( void ));
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#endif
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#ifdef HAVE_SETCONCURRENCY
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# ifndef LDAP_THREAD_CONCURRENCY
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/* three concurrent threads should be enough */
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# define LDAP_THREAD_CONCURRENCY 3
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# endif
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LDAP_F int
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ldap_pvt_thread_set_concurrency LDAP_P(( int ));
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#endif
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#define LDAP_PVT_THREAD_CREATE_JOINABLE 0
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#define LDAP_PVT_THREAD_CREATE_DETACHED 1
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LDAP_F int
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ldap_pvt_thread_create LDAP_P((
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ldap_pvt_thread_t * thread,
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int detach,
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void *(*start_routine)( void * ),
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void *arg));
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LDAP_F void
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ldap_pvt_thread_exit LDAP_P(( void *retval ));
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LDAP_F int
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ldap_pvt_thread_join LDAP_P(( ldap_pvt_thread_t thread, void **status ));
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LDAP_F int
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ldap_pvt_thread_kill LDAP_P(( ldap_pvt_thread_t thread, int signo ));
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LDAP_F int
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ldap_pvt_thread_yield LDAP_P(( void ));
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LDAP_F int
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ldap_pvt_thread_cond_init LDAP_P(( ldap_pvt_thread_cond_t *cond ));
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LDAP_F int
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ldap_pvt_thread_cond_destroy LDAP_P(( ldap_pvt_thread_cond_t *cond ));
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LDAP_F int
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ldap_pvt_thread_cond_signal LDAP_P(( ldap_pvt_thread_cond_t *cond ));
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LDAP_F int
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ldap_pvt_thread_cond_broadcast LDAP_P(( ldap_pvt_thread_cond_t *cond ));
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LDAP_F int
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ldap_pvt_thread_cond_wait LDAP_P((
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ldap_pvt_thread_cond_t *cond,
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ldap_pvt_thread_mutex_t *mutex ));
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LDAP_F int
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ldap_pvt_thread_mutex_init LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));
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LDAP_F int
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ldap_pvt_thread_mutex_destroy LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));
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LDAP_F int
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ldap_pvt_thread_mutex_lock LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));
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LDAP_F int
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ldap_pvt_thread_mutex_trylock LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));
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LDAP_F int
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ldap_pvt_thread_mutex_unlock LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));
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typedef struct ldap_pvt_thread_rdwr_var {
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ldap_pvt_thread_mutex_t ltrw_mutex;
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ldap_pvt_thread_cond_t ltrw_read; /* wait for read */
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ldap_pvt_thread_cond_t ltrw_write; /* wait for write */
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int ltrw_valid;
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#define LDAP_PVT_THREAD_RDWR_VALUE 0x0bad
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int ltrw_r_active;
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int ltrw_w_active;
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int ltrw_r_wait;
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int ltrw_w_wait;
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} ldap_pvt_thread_rdwr_t;
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LDAP_F int
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ldap_pvt_thread_rdwr_init LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_destroy LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_rlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_rtrylock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_runlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_wlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_wtrylock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_wunlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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#ifdef LDAP_DEBUG
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LDAP_F int
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ldap_pvt_thread_rdwr_readers LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_writers LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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LDAP_F int
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ldap_pvt_thread_rdwr_active LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
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#endif /* LDAP_DEBUG */
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#define LDAP_PVT_THREAD_EINVAL EINVAL
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#define LDAP_PVT_THREAD_EBUSY EINVAL
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LDAP_END_DECL
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#endif /* _LDAP_THREAD_H */
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