MagickExport CacheView *AcquireVirtualCacheView(const Image *image,
ExceptionInfo *exception)
{
CacheView
*restrict cache_view;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
(void) exception;
cache_view=(CacheView *) MagickAssumeAligned(AcquireAlignedMemory(1,
sizeof(*cache_view)));
if (cache_view == (CacheView *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(cache_view,0,sizeof(*cache_view));
cache_view->image=ReferenceImage((Image *) image);
cache_view->number_threads=GetOpenMPMaximumThreads();
if (GetMagickResourceLimit(ThreadResource) > cache_view->number_threads)
cache_view->number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
if (cache_view->number_threads == 0)
cache_view->number_threads=1;
cache_view->nexus_info=AcquirePixelCacheNexus(cache_view->number_threads);
cache_view->virtual_pixel_method=GetImageVirtualPixelMethod(image);
cache_view->debug=IsEventLogging();
cache_view->signature=MagickSignature;
if (cache_view->nexus_info == (NexusInfo **) NULL)
ThrowFatalException(CacheFatalError,"UnableToAcquireCacheView");
return(cache_view);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A c q u i r e V i r t u a l M e m o r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AcquireVirtualMemory() allocates a pointer to a block of memory at least size
% bytes suitably aligned for any use.
%
% The format of the AcquireVirtualMemory method is:
%
% MemoryInfo *AcquireVirtualMemory(const size_t count,const size_t quantum)
%
% A description of each parameter follows:
%
% o count: the number of quantum elements to allocate.
%
% o quantum: the number of bytes in each quantum.
%
*/
MagickExport MemoryInfo *AcquireVirtualMemory(const size_t count,
const size_t quantum)
{
MemoryInfo
*memory_info;
size_t
length;
length=count*quantum;
if ((count == 0) || (quantum != (length/count)))
{
errno=ENOMEM;
return((void *) NULL);
}
memory_info=(MemoryInfo *) MagickAssumeAligned(AcquireAlignedMemory(1,
sizeof(*memory_info)));
if (memory_info == (MemoryInfo *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(memory_info,0,sizeof(*memory_info));
memory_info->length=length;
memory_info->signature=MagickSignature;
memory_info->blob=AcquireMagickMemory(length);
if (memory_info->blob == NULL)
{
/*
Heap memory failed, try anonymous memory mapping.
*/
memory_info->mapped=MagickTrue;
memory_info->blob=MapBlob(-1,IOMode,0,length);
}
if (memory_info->blob == NULL)
{
int
file;
/*
Anonymous memory mapping failed, try file-backed memory mapping.
*/
file=AcquireUniqueFileResource(memory_info->filename);
file=open_utf8(memory_info->filename,O_RDWR | O_CREAT | O_BINARY | O_EXCL,
S_MODE);
if (file == -1)
file=open_utf8(memory_info->filename,O_RDWR | O_BINARY,S_MODE);
if (file != -1)
{
if ((lseek(file,length-1,SEEK_SET) >= 0) && (write(file,"",1) == 1))
memory_info->blob=MapBlob(file,IOMode,0,length);
(void) close(file);
}
}
if (memory_info->blob == NULL)
return(RelinquishVirtualMemory(memory_info));
return(memory_info);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C l o n e C a c h e V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CloneCacheView() makes an exact copy of the specified cache view.
%
% The format of the CloneCacheView method is:
%
% CacheView *CloneCacheView(const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport CacheView *CloneCacheView(const CacheView *cache_view)
{
CacheView
*restrict clone_view;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickSignature);
if (cache_view->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
cache_view->image->filename);
clone_view=(CacheView *) MagickAssumeAligned(AcquireAlignedMemory(1,
sizeof(*clone_view)));
if (clone_view == (CacheView *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(clone_view,0,sizeof(*clone_view));
clone_view->image=ReferenceImage(cache_view->image);
clone_view->number_threads=cache_view->number_threads;
clone_view->nexus_info=AcquirePixelCacheNexus(cache_view->number_threads);
clone_view->virtual_pixel_method=cache_view->virtual_pixel_method;
clone_view->debug=cache_view->debug;
clone_view->signature=MagickSignature;
return(clone_view);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A c q u i r e V i r t u a l M e m o r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AcquireVirtualMemory() allocates a pointer to a block of memory at least size
% bytes suitably aligned for any use.
%
% The format of the AcquireVirtualMemory method is:
%
% MemoryInfo *AcquireVirtualMemory(const size_t count,const size_t quantum)
%
% A description of each parameter follows:
%
% o count: the number of quantum elements to allocate.
%
% o quantum: the number of bytes in each quantum.
%
*/
MagickExport MemoryInfo *AcquireVirtualMemory(const size_t count,
const size_t quantum)
{
MemoryInfo
*memory_info;
size_t
length;
length=count*quantum;
if ((count == 0) || (quantum != (length/count)))
{
errno=ENOMEM;
return((MemoryInfo *) NULL);
}
memory_info=(MemoryInfo *) MagickAssumeAligned(AcquireAlignedMemory(1,
sizeof(*memory_info)));
if (memory_info == (MemoryInfo *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(memory_info,0,sizeof(*memory_info));
memory_info->length=length;
memory_info->signature=MagickSignature;
if (AcquireMagickResource(MemoryResource,length) != MagickFalse)
{
memory_info->blob=AcquireAlignedMemory(1,length);
if (memory_info->blob != NULL)
memory_info->type=AlignedVirtualMemory;
else
RelinquishMagickResource(MemoryResource,length);
}
if ((memory_info->blob == NULL) &&
(AcquireMagickResource(MapResource,length) != MagickFalse))
{
/*
Heap memory failed, try anonymous memory mapping.
*/
memory_info->blob=MapBlob(-1,IOMode,0,length);
if (memory_info->blob != NULL)
memory_info->type=MapVirtualMemory;
else
RelinquishMagickResource(MapResource,length);
}
if (memory_info->blob == NULL)
{
int
file;
/*
Anonymous memory mapping failed, try file-backed memory mapping.
*/
file=AcquireUniqueFileResource(memory_info->filename);
if (file != -1)
{
if ((lseek(file,length-1,SEEK_SET) >= 0) && (write(file,"",1) == 1))
{
memory_info->blob=MapBlob(file,IOMode,0,length);
if (memory_info->blob != NULL)
{
memory_info->type=MapVirtualMemory;
(void) AcquireMagickResource(MapResource,length);
}
}
(void) close(file);
}
}
if (memory_info->blob == NULL)
{
memory_info->blob=AcquireMagickMemory(length);
if (memory_info->blob != NULL)
memory_info->type=UnalignedVirtualMemory;
}
if (memory_info->blob == NULL)
memory_info=RelinquishVirtualMemory(memory_info);
return(memory_info);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A c q u i r e V i r t u a l M e m o r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AcquireVirtualMemory() allocates a pointer to a block of memory at least size
% bytes suitably aligned for any use.
%
% The format of the AcquireVirtualMemory method is:
%
% MemoryInfo *AcquireVirtualMemory(const size_t count,const size_t quantum)
%
% A description of each parameter follows:
%
% o count: the number of quantum elements to allocate.
%
% o quantum: the number of bytes in each quantum.
%
*/
MagickExport MemoryInfo *AcquireVirtualMemory(const size_t count,
const size_t quantum)
{
MemoryInfo
*memory_info;
size_t
extent;
if (CheckMemoryOverflow(count,quantum) != MagickFalse)
return((MemoryInfo *) NULL);
memory_info=(MemoryInfo *) MagickAssumeAligned(AcquireAlignedMemory(1,
sizeof(*memory_info)));
if (memory_info == (MemoryInfo *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(memory_info,0,sizeof(*memory_info));
extent=count*quantum;
memory_info->length=extent;
memory_info->signature=MagickCoreSignature;
if (AcquireMagickResource(MemoryResource,extent) != MagickFalse)
{
memory_info->blob=AcquireAlignedMemory(1,extent);
if (memory_info->blob != NULL)
{
memory_info->type=AlignedVirtualMemory;
return(memory_info);
}
}
RelinquishMagickResource(MemoryResource,extent);
if (AcquireMagickResource(MapResource,extent) != MagickFalse)
{
/*
Heap memory failed, try anonymous memory mapping.
*/
memory_info->blob=MapBlob(-1,IOMode,0,extent);
if (memory_info->blob != NULL)
{
memory_info->type=MapVirtualMemory;
return(memory_info);
}
if (AcquireMagickResource(DiskResource,extent) != MagickFalse)
{
int
file;
/*
Anonymous memory mapping failed, try file-backed memory mapping.
If the MapResource request failed, there is no point in trying
file-backed memory mapping.
*/
file=AcquireUniqueFileResource(memory_info->filename);
if (file != -1)
{
if ((lseek(file,extent-1,SEEK_SET) == (extent-1)) &&
(write(file,"",1) == 1))
{
memory_info->blob=MapBlob(file,IOMode,0,extent);
if (memory_info->blob != NULL)
{
(void) close(file);
memory_info->type=MapVirtualMemory;
return(memory_info);
}
}
/*
File-backed memory mapping failed, delete the temporary file.
*/
(void) close(file);
(void) RelinquishUniqueFileResource(memory_info->filename);
*memory_info->filename = '\0';
}
}
RelinquishMagickResource(DiskResource,extent);
}
RelinquishMagickResource(MapResource,extent);
if (memory_info->blob == NULL)
{
memory_info->blob=AcquireMagickMemory(extent);
if (memory_info->blob != NULL)
memory_info->type=UnalignedVirtualMemory;
}
if (memory_info->blob == NULL)
memory_info=RelinquishVirtualMemory(memory_info);
return(memory_info);
}
