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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W W AAA N N DDDD %
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% W W A A NN N D D %
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% W W W AAAAA N N N D D %
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% WW WW A A N NN D D %
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% W W A A N N DDDD %
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% %
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% %
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% MagickWand Support Methods %
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% %
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% Software Design %
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% Cristy %
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% May 2004 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickWand/studio.h"
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#include "MagickWand/MagickWand.h"
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#include "MagickWand/magick-wand-private.h"
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#include "MagickWand/wand.h"
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static SplayTreeInfo
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*wand_ids = (SplayTreeInfo *) NULL;
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static MagickBooleanType
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instantiate_wand = MagickFalse;
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static SemaphoreInfo
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*wand_semaphore = (SemaphoreInfo *) NULL;
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% A c q u i r e W a n d I d %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% AcquireWandId() returns a unique wand id.
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%
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% The format of the AcquireWandId() method is:
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%
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% size_t AcquireWandId()
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%
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*/
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WandExport size_t AcquireWandId(void)
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{
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static size_t
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id = 0;
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size_t
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wand_id;
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if (wand_semaphore == (SemaphoreInfo *) NULL)
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ActivateSemaphoreInfo(&wand_semaphore);
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LockSemaphoreInfo(wand_semaphore);
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if (wand_ids == (SplayTreeInfo *) NULL)
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wand_ids=NewSplayTree((int (*)(const void *,const void *)) NULL,
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(void *(*)(void *)) NULL,(void *(*)(void *)) NULL);
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wand_id=id++;
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(void) AddValueToSplayTree(wand_ids,(const void *) wand_id,
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(const void *) wand_id);
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instantiate_wand=MagickTrue;
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UnlockSemaphoreInfo(wand_semaphore);
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return(wand_id);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% D e s t r o y W a n d I d s %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% DestroyWandIds() deallocates memory associated with the wand id's.
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%
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% The format of the DestroyWandIds() method is:
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%
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% void DestroyWandIds(void)
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%
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% A description of each parameter follows:
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%
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*/
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WandExport void DestroyWandIds(void)
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{
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if (wand_semaphore == (SemaphoreInfo *) NULL)
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ActivateSemaphoreInfo(&wand_semaphore);
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LockSemaphoreInfo(wand_semaphore);
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if (wand_ids != (SplayTreeInfo *) NULL)
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wand_ids=DestroySplayTree(wand_ids);
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instantiate_wand=MagickFalse;
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UnlockSemaphoreInfo(wand_semaphore);
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RelinquishSemaphoreInfo(&wand_semaphore);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e l i n q u i s h W a n d I d %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RelinquishWandId() relinquishes a unique wand id.
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%
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% The format of the RelinquishWandId() method is:
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%
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% void RelinquishWandId(const size_t *id)
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%
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% A description of each parameter follows:
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%
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% o id: a unique wand id.
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%
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*/
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WandExport void RelinquishWandId(const size_t id)
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{
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LockSemaphoreInfo(wand_semaphore);
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if (wand_ids != (SplayTreeInfo *) NULL)
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(void) DeleteNodeFromSplayTree(wand_ids,(const void *) id);
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UnlockSemaphoreInfo(wand_semaphore);
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}
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