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/*
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2008-2008 - INRIA - Bruno JOFRET
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
*
*/
/**
** This is to provide a global Tcl interpreter
** with Locking system in order it does not have any
** concurrential access
**/
#include "GlobalTclInterp.h"
#include "Thread_Wrapper.h"
Tcl_Interp *__globalTclInterp = NULL;
__threadLock singleInterpAccess;
static int initialized = 0;
/*
** Initialize the global interpreter.
*/
void initTclInterp(void)
{
__InitLock(&singleInterpAccess);
__Lock(&singleInterpAccess);
__globalTclInterp = Tcl_CreateInterp();
__UnLock(&singleInterpAccess);
/* indicate that we have in fact initialized our mutex */
initialized = 1;
}
/*
** Delete the global interpreter.
*/
void deleteTclInterp(void)
{
__globalTclInterp = NULL;
}
/*
** Get the Global Interpreter
*/
Tcl_Interp *getTclInterp(void)
{
if (! initialized )
{
return NULL;
}
__Lock(&singleInterpAccess);
return __globalTclInterp;
}
/*
** Release Tcl Interp after use.
*/
void releaseTclInterp(void)
{
/* only try to unlock if we have already initialized our threading system */
if ( initialized )
{
__UnLock(&singleInterpAccess);
}
}
/*
** Check if global interp exists.
*/
BOOL existsGlobalInterp(void)
{
if (__globalTclInterp != NULL)
{
return TRUE;
}
return FALSE;
}
/*
** Check if slave interp exists.
*/
BOOL existsSlaveInterp(char *name)
{
if (Tcl_GetSlave(getTclInterp(), name) != NULL)
{
releaseTclInterp();
return TRUE;
}
releaseTclInterp();
return FALSE;
}
/*
** WARNING
** Get the Global Interpreter
** without any lock
** should not be used ouside of the main
** TCL loop (the one containing update)
*/
Tcl_Interp *requestTclInterp(void)
{
return __globalTclInterp;
}
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