/* $OpenLDAP$ */
/*
 * Copyright 1998,1999 The OpenLDAP Foundation, Redwood City, California, USA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted only
 * as authorized by the OpenLDAP Public License.  A copy of this
 * license is available at http://www.OpenLDAP.org/license.html or
 * in file LICENSE in the top-level directory of the distribution.
 */
/* ldap_pvt_thread.h - ldap threads header file NG */

#ifndef _LDAP_PVT_THREAD_H
#define _LDAP_PVT_THREAD_H

#include "ldap_cdefs.h"

#if defined( HAVE_PTHREADS )
/**********************************
 *                                *
 * definitions for POSIX Threads  *
 *                                *
 **********************************/

#include <pthread.h>
#ifdef HAVE_SCHED_H
#include <sched.h>
#endif

LDAP_BEGIN_DECL

typedef pthread_t		ldap_pvt_thread_t;
typedef pthread_mutex_t		ldap_pvt_thread_mutex_t;
typedef pthread_cond_t		ldap_pvt_thread_cond_t;

#if defined( _POSIX_REENTRANT_FUNCTIONS ) || \
	defined( _POSIX_THREAD_SAFE_FUNCTIONS ) || \
	defined( _POSIX_THREADSAFE_FUNCTIONS )
#define HAVE_REENTRANT_FUNCTIONS 1
#endif

#if defined( HAVE_PTHREAD_GETCONCURRENCY ) || \
	defined( HAVE_THR_GETCONCURRENCY )
#define HAVE_GETCONCURRENCY 1
#endif

#if defined( HAVE_PTHREAD_SETCONCURRENCY ) || \
	defined( HAVE_THR_SETCONCURRENCY )
#define HAVE_SETCONCURRENCY 1
#endif

LDAP_END_DECL

#elif defined ( HAVE_MACH_CTHREADS )
/**********************************
 *                                *
 * definitions for Mach CThreads  *
 *                                *
 **********************************/

#include <mach/cthreads.h>

LDAP_BEGIN_DECL

typedef cthread_t		ldap_pvt_thread_t;
typedef struct mutex		ldap_pvt_thread_mutex_t;
typedef struct condition	ldap_pvt_thread_cond_t;

LDAP_END_DECL

#elif defined( HAVE_GNU_PTH )
/***********************************
 *                                 *
 * thread definitions for GNU Pth  *
 *                                 *
 ***********************************/

#include <pth.h>

LDAP_BEGIN_DECL

typedef pth_t		ldap_pvt_thread_t;
typedef pth_mutex_t	ldap_pvt_thread_mutex_t;
typedef pth_cond_t	ldap_pvt_thread_cond_t;

LDAP_END_DECL


#elif defined( HAVE_THR )
/********************************************
 *                                          *
 * thread definitions for Solaris LWP (THR) *
 *                                          *
 ********************************************/

#include <thread.h>
#include <synch.h>

LDAP_BEGIN_DECL

typedef thread_t		ldap_pvt_thread_t;
typedef mutex_t			ldap_pvt_thread_mutex_t;
typedef cond_t			ldap_pvt_thread_cond_t;

#define HAVE_REENTRANT_FUNCTIONS 1

#ifdef HAVE_THR_GETCONCURRENCY
#define HAVE_GETCONCURRENCY 1
#endif
#ifdef HAVE_THR_SETCONCURRENCY
#define HAVE_SETCONCURRENCY 1
#endif

LDAP_END_DECL

#elif defined( HAVE_LWP )
/*************************************
 *                                   *
 * thread definitions for SunOS LWP  *
 *                                   *
 *************************************/

#include <lwp/lwp.h>
#include <lwp/stackdep.h>

LDAP_BEGIN_DECL

typedef thread_t		ldap_pvt_thread_t;
typedef mon_t			ldap_pvt_thread_mutex_t;
struct ldap_pvt_thread_lwp_cv {
	int		lcv_created;
	cv_t		lcv_cv;
};
typedef struct ldap_pvt_thread_lwp_cv ldap_pvt_thread_cond_t;

#define HAVE_REENTRANT_FUNCTIONS 1

LDAP_END_DECL

#elif defined(HAVE_NT_THREADS)

LDAP_BEGIN_DECL

#include <process.h>
#include <windows.h>

typedef unsigned long	ldap_pvt_thread_t;
typedef HANDLE	ldap_pvt_thread_mutex_t;
typedef HANDLE	ldap_pvt_thread_cond_t;

LDAP_END_DECL

#else

/***********************************
 *                                 *
 * thread definitions for no       *
 * underlying library support      *
 *                                 *
 ***********************************/

LDAP_BEGIN_DECL

#ifndef NO_THREADS
#define NO_THREADS 1
#endif

typedef int			ldap_pvt_thread_t;
typedef int			ldap_pvt_thread_mutex_t;
typedef int			ldap_pvt_thread_cond_t;

LDAP_END_DECL

#endif /* no threads support */

LDAP_BEGIN_DECL

LIBLDAP_F( int )
ldap_pvt_thread_initialize LDAP_P(( void ));

LIBLDAP_F( int )
ldap_pvt_thread_destroy LDAP_P(( void ));

LIBLDAP_F( unsigned int )
ldap_pvt_thread_sleep LDAP_P(( unsigned int s ));

#ifdef HAVE_GETCONCURRENCY
LIBLDAP_F( int )
ldap_pvt_thread_get_concurrency LDAP_P(( void ));
#endif

#ifdef HAVE_SETCONCURRENCY
#	ifndef LDAP_THREAD_CONCURRENCY
	/* three concurrent threads should be enough */
#	define LDAP_THREAD_CONCURRENCY	3
#	endif
LIBLDAP_F( int )
ldap_pvt_thread_set_concurrency LDAP_P(( int ));
#endif

#define LDAP_PVT_THREAD_CREATE_JOINABLE 0
#define LDAP_PVT_THREAD_CREATE_DETACHED 1

LIBLDAP_F( int ) 
ldap_pvt_thread_create LDAP_P((
	ldap_pvt_thread_t * thread, 
	int	detach,
	void *(*start_routine)( void * ), 
	void *arg));

LIBLDAP_F( void ) 
ldap_pvt_thread_exit LDAP_P(( void *retval ));

LIBLDAP_F( int )
ldap_pvt_thread_join LDAP_P(( ldap_pvt_thread_t thread, void **status ));

LIBLDAP_F( int )
ldap_pvt_thread_kill LDAP_P(( ldap_pvt_thread_t thread, int signo ));

LIBLDAP_F( int )
ldap_pvt_thread_yield LDAP_P(( void ));

LIBLDAP_F( int )
ldap_pvt_thread_cond_init LDAP_P(( ldap_pvt_thread_cond_t *cond ));

LIBLDAP_F( int )
ldap_pvt_thread_cond_destroy LDAP_P(( ldap_pvt_thread_cond_t *cond ));

LIBLDAP_F( int )
ldap_pvt_thread_cond_signal LDAP_P(( ldap_pvt_thread_cond_t *cond ));

LIBLDAP_F( int )
ldap_pvt_thread_cond_broadcast LDAP_P(( ldap_pvt_thread_cond_t *cond ));

LIBLDAP_F( int )
ldap_pvt_thread_cond_wait LDAP_P((
	ldap_pvt_thread_cond_t *cond, 
	ldap_pvt_thread_mutex_t *mutex ));

LIBLDAP_F( int )
ldap_pvt_thread_mutex_init LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));

LIBLDAP_F( int )
ldap_pvt_thread_mutex_destroy LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));

LIBLDAP_F( int )
ldap_pvt_thread_mutex_lock LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));

LIBLDAP_F( int )
ldap_pvt_thread_mutex_trylock LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));

LIBLDAP_F( int )
ldap_pvt_thread_mutex_unlock LDAP_P(( ldap_pvt_thread_mutex_t *mutex ));

typedef struct ldap_pvt_thread_rdwr_var {
	ldap_pvt_thread_mutex_t ltrw_mutex;	
	ldap_pvt_thread_cond_t ltrw_read;	/* wait for read */
	ldap_pvt_thread_cond_t ltrw_write;	/* wait for write */
	int ltrw_valid;
#define LDAP_PVT_THREAD_RDWR_VALID 0x0bad
	int ltrw_r_active;
	int ltrw_w_active;
	int ltrw_r_wait;
	int ltrw_w_wait;
} ldap_pvt_thread_rdwr_t;

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_init LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_destroy LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_rlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_rtrylock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_runlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_wlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_wtrylock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_wunlock LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

#ifdef LDAP_DEBUG
LIBLDAP_F( int )
ldap_pvt_thread_rdwr_readers LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_writers LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));

LIBLDAP_F( int )
ldap_pvt_thread_rdwr_active LDAP_P((ldap_pvt_thread_rdwr_t *rdwrp));
#endif /* LDAP_DEBUG */

#define LDAP_PVT_THREAD_EINVAL EINVAL
#define LDAP_PVT_THREAD_EBUSY EINVAL

LDAP_END_DECL

#endif /* _LDAP_THREAD_H */