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/** BEGIN COPYRIGHT BLOCK
* This Program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; version 2 of the License.
*
* This Program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/*
* slapi2nspr.c - expose a subset of the NSPR20/21 API to SLAPI plugin writers
*
*/
#include "slap.h"
#include <nspr.h>
/*
* Note that Slapi_Mutex and Slapi_CondVar are defined like this in
* slapi-plugin.h:
*
* typedef struct slapi_mutex Slapi_Mutex;
* typedef struct slapi_condvar Slapi_CondVar;
*
* but there is no definition for struct slapi_mutex or struct slapi_condvar.
* This seems to work okay since we always use them in pointer form and cast
* directly to their NSPR equivalents. Clever, huh?
*/
/*
* ---------------- SLAPI API Functions --------------------------------------
*/
/*
* Function: slapi_new_mutex
* Description: behaves just like PR_NewLock().
* Returns: a pointer to the new mutex (NULL if a mutex can't be created).
*/
Slapi_Mutex *
slapi_new_mutex( void )
{
return( (Slapi_Mutex *)PR_NewLock());
}
/*
* Function: slapi_destroy_mutex
* Description: behaves just like PR_DestroyLock().
*/
void
slapi_destroy_mutex( Slapi_Mutex *mutex )
{
if ( mutex != NULL ) {
PR_DestroyLock( (PRLock *)mutex );
}
}
/*
* Function: slapi_lock_mutex
* Description: behaves just like PR_Lock().
*/
void
slapi_lock_mutex( Slapi_Mutex *mutex )
{
if ( mutex != NULL ) {
PR_Lock( (PRLock *)mutex );
}
}
/*
* Function: slapi_unlock_mutex
* Description: behaves just like PR_Unlock().
* Returns:
* non-zero if mutex was successfully unlocked.
* 0 if mutex is NULL or is not locked by the calling thread.
*/
int
slapi_unlock_mutex( Slapi_Mutex *mutex )
{
if ( mutex == NULL || PR_Unlock( (PRLock *)mutex ) == PR_FAILURE ) {
return( 0 );
} else {
return( 1 );
}
}
/*
* Function: slapi_new_condvar
* Description: behaves just like PR_NewCondVar().
* Returns: pointer to a new condition variable (NULL if one can't be created).
*/
Slapi_CondVar *
slapi_new_condvar( Slapi_Mutex *mutex )
{
if ( mutex == NULL ) {
return( NULL );
}
return( (Slapi_CondVar *)PR_NewCondVar( (PRLock *)mutex ));
}
/*
* Function: slapi_destroy_condvar
* Description: behaves just like PR_DestroyCondVar().
*/
void
slapi_destroy_condvar( Slapi_CondVar *cvar )
{
if ( cvar != NULL ) {
PR_DestroyCondVar( (PRCondVar *)cvar );
}
}
/*
* Function: slapi_wait_condvar
* Description: behaves just like PR_WaitCondVar() except timeout is
* in seconds and microseconds instead of PRIntervalTime units.
* If timeout is NULL, this call blocks indefinitely.
* Returns:
* non-zero is all goes well.
* 0 if cvar is NULL, the caller has not locked the mutex associated
* with cvar, or the waiting thread was interrupted.
*/
int
slapi_wait_condvar( Slapi_CondVar *cvar, struct timeval *timeout )
{
PRIntervalTime prit;
if ( cvar == NULL ) {
return( 0 );
}
if ( timeout == NULL ) {
prit = PR_INTERVAL_NO_TIMEOUT;
} else {
prit = PR_SecondsToInterval( timeout->tv_sec )
+ PR_MicrosecondsToInterval( timeout->tv_usec );
}
if ( PR_WaitCondVar( (PRCondVar *)cvar, prit ) != PR_SUCCESS ) {
return( 0 );
}
return( 1 );
}
/*
* Function: slapi_notify_condvar
* Description: if notify_all is zero, behaves just like PR_NotifyCondVar().
* if notify_all is non-zero, behaves just like PR_NotifyAllCondVar().
* Returns:
* non-zero if all goes well.
* 0 if cvar is NULL or the caller has not locked the mutex associated
* with cvar.
*/
int
slapi_notify_condvar( Slapi_CondVar *cvar, int notify_all )
{
PRStatus prrc;
if ( cvar == NULL ) {
return( 0 );
}
if ( notify_all ) {
prrc = PR_NotifyAllCondVar( (PRCondVar *)cvar );
} else {
prrc = PR_NotifyCondVar( (PRCondVar *)cvar );
}
return( prrc == PR_SUCCESS ? 1 : 0 );
}
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