xref: /dflybsd-src/lib/libc/gen/_pthread_stubs.c (revision 19c7a9130e745ee7178faf1a01ad39d98bfa9706)

/*
 * Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: /repoman/r/ncvs/src/lib/libc/gen/_pthread_stubs.c,v 1.1 2001/01/24 12:59:20 deischen Exp $
 * $DragonFly: src/lib/libc/gen/_pthread_stubs.c,v 1.4 2005/05/09 12:43:40 davidxu Exp $
 */

#include <pthread.h>

void	*_pthread_getspecific_stub(pthread_key_t);
int	_pthread_key_create_stub(pthread_key_t *, void (*)(void *));
int	_pthread_key_delete_stub(pthread_key_t);
int	_pthread_mutex_destroy_stub(pthread_mutex_t *);
int	_pthread_mutex_init_stub(pthread_mutex_t *,
				 const pthread_mutexattr_t *);
int	_pthread_mutex_lock_stub(pthread_mutex_t *);
int	_pthread_mutex_trylock_stub(pthread_mutex_t *);
int	_pthread_mutex_unlock_stub(pthread_mutex_t *);
int	_pthread_mutexattr_init_stub(pthread_mutexattr_t *);
int	_pthread_mutexattr_destroy_stub(pthread_mutexattr_t *);
int	_pthread_mutexattr_settype_stub(pthread_mutexattr_t *, int);
int	_pthread_once_stub(pthread_once_t *, void (*)(void));
int	_pthread_setspecific_stub(pthread_key_t, const void *);

/* define a null pthread structure just to satisfy _pthread_self */
struct pthread {
};

static struct pthread main_thread;

/*
 * Weak symbols: All libc internal usage of these functions should
 * use the weak symbol versions (_pthread_XXX).  If libpthread is
 * linked, it will override these functions with (non-weak) routines.
 * The _pthread_XXX functions are provided solely for internal libc
 * usage to avoid unwanted cancellation points and to differentiate
 * between application locks and libc locks (threads holding the
 * latter can't be allowed to exit/terminate).
 */
__weak_reference(_pthread_getspecific_stub,_pthread_getspecific);
__weak_reference(_pthread_key_create_stub,_pthread_key_create);
__weak_reference(_pthread_key_delete_stub,_pthread_key_delete);
__weak_reference(_pthread_mutex_destroy_stub,_pthread_mutex_destroy);
__weak_reference(_pthread_mutex_init_stub,_pthread_mutex_init);
__weak_reference(_pthread_mutex_lock_stub,_pthread_mutex_lock);
__weak_reference(_pthread_mutex_trylock_stub,_pthread_mutex_trylock);
__weak_reference(_pthread_mutex_unlock_stub,_pthread_mutex_unlock);
__weak_reference(_pthread_mutexattr_init_stub,_pthread_mutexattr_init);
__weak_reference(_pthread_mutexattr_destroy_stub,_pthread_mutexattr_destroy);
__weak_reference(_pthread_mutexattr_settype_stub,_pthread_mutexattr_settype);
__weak_reference(_pthread_once_stub,_pthread_once);
__weak_reference(_pthread_setspecific_stub,_pthread_setspecific);
__weak_reference(_pthread_self_stub,_pthread_self);

void *
_pthread_getspecific_stub(pthread_key_t key __unused)
{
	return (NULL);
}

int
_pthread_key_create_stub(pthread_key_t *key __unused,
			 void (*destructor) (void *) __unused)
{
	return (0);
}

int
_pthread_key_delete_stub(pthread_key_t key __unused)
{
	return (0);
}

int
_pthread_mutex_destroy_stub(pthread_mutex_t *mattr __unused)
{
	return (0);
}

int
_pthread_mutex_init_stub(pthread_mutex_t *mutex __unused,
			 const pthread_mutexattr_t *mattr __unused)
{
	return (0);
}

int
_pthread_mutex_lock_stub(pthread_mutex_t *mutex __unused)
{
	return (0);
}

int
_pthread_mutex_trylock_stub(pthread_mutex_t *mutex __unused)
{
	return (0);
}

int
_pthread_mutex_unlock_stub(pthread_mutex_t *mutex __unused)
{
	return (0);
}

int
_pthread_mutexattr_init_stub(pthread_mutexattr_t *mattr __unused)
{
	return (0);
}

int
_pthread_mutexattr_destroy_stub(pthread_mutexattr_t *mattr __unused)
{
	return (0);
}

int
_pthread_mutexattr_settype_stub(pthread_mutexattr_t *mattr __unused,
				int type __unused)
{
	return (0);
}

int
_pthread_once_stub(pthread_once_t *once_control __unused,
		   void (*init_routine) (void) __unused)
{
	return (0);
}

struct pthread *
_pthread_self_stub(void)
{
	return (&main_thread);
}
int
_pthread_setspecific_stub(pthread_key_t key __unused,
			  const void *value __unused)
{
	return (0);
}