/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W W AAA N N DDDD %
% W W A A NN N D D %
% W W W AAAAA N N N D D %
% WW WW A A N NN D D %
% W W A A N N DDDD %
% %
% %
% Wand Support Methods %
% %
% Software Design %
% John Cristy %
% May 2004 %
% %
% %
% Copyright 1999-2007 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "wand/studio.h"
#include "wand/MagickWand.h"
#include "wand/magick-wand-private.h"
#include "wand/wand.h"
static SplayTreeInfo
*wand_ids = (SplayTreeInfo *) NULL;
static MagickBooleanType
instantiate_wand = MagickFalse;
static SemaphoreInfo
*wand_semaphore = (SemaphoreInfo *) NULL;
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A c q u i r e W a n d I d %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AcquireWandId() returns a unique wand id.
%
% The format of the AcquireWandId() method is:
%
% unsigned long AcquireWandId()
%
*/
WandExport unsigned long AcquireWandId(void)
{
static unsigned long
id = 0;
if ((wand_ids == (SplayTreeInfo *) NULL) &&
(instantiate_wand == MagickFalse))
{
AcquireSemaphoreInfo(&wand_semaphore);
if ((wand_ids == (SplayTreeInfo *) NULL) &&
(instantiate_wand == MagickFalse))
{
wand_ids=NewSplayTree((int (*)(const void *,const void *)) NULL,
(void *(*)(void *)) NULL,(void *(*)(void *)) NULL);
if (IsMagickInstantiated() == MagickFalse)
MagickCoreGenesis((char *) NULL,MagickFalse);
instantiate_wand=MagickTrue;
}
RelinquishSemaphoreInfo(wand_semaphore);
}
AcquireSemaphoreInfo(&wand_semaphore);
id++;
(void) AddValueToSplayTree(wand_ids,(const void *) id,(const void *) id);
RelinquishSemaphoreInfo(wand_semaphore);
return(id);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e l i n q u i s h W a n d I d %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RelinquishWandId() relinquishes a unique wand id.
%
% The format of the RelinquishWandId() method is:
%
% void RelinquishWandId(const unsigned long *id)
%
% A description of each parameter follows:
%
% o id: a unique wand id.
%
*/
WandExport void RelinquishWandId(const unsigned long id)
{
(void) LogMagickEvent(WandEvent,GetMagickModule(),"...");
if (wand_ids == (SplayTreeInfo *) NULL)
return;
AcquireSemaphoreInfo(&wand_semaphore);
(void) DeleteNodeByValueFromSplayTree(wand_ids,(const void *) id);
if ((instantiate_wand == MagickFalse) ||
(GetNumberOfNodesInSplayTree(wand_ids) != 0))
{
RelinquishSemaphoreInfo(wand_semaphore);
return;
}
MagickCoreTerminus();
wand_ids=DestroySplayTree(wand_ids);
instantiate_wand=MagickFalse;
RelinquishSemaphoreInfo(wand_semaphore);
wand_semaphore=DestroySemaphoreInfo(wand_semaphore);
}
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