/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% L o c k S e m a p h o r e I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% LockSemaphoreInfo() locks a semaphore.
%
% The format of the LockSemaphoreInfo method is:
%
% void LockSemaphoreInfo(SemaphoreInfo *semaphore_info)
%
% A description of each parameter follows:
%
% o semaphore_info: Specifies a pointer to an SemaphoreInfo structure.
%
*/
MagickExport void LockSemaphoreInfo(SemaphoreInfo *semaphore_info)
{
assert(semaphore_info != (SemaphoreInfo *) NULL);
assert(semaphore_info->signature == MagickSignature);
#if defined(MAGICKCORE_THREAD_SUPPORT)
{
int
status;
status=pthread_mutex_lock(&semaphore_info->mutex);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,"UnableToLockSemaphore");
}
}
#elif defined(MAGICKCORE_HAVE_WINTHREADS)
EnterCriticalSection(&semaphore_info->mutex);
#endif
#if defined(MAGICKCORE_DEBUG)
if ((semaphore_info->reference_count > 0) &&
(IsMagickThreadEqual(semaphore_info->id) != MagickFalse))
{
(void) FormatLocaleFile(stderr,"Warning: unexpected recursive lock!\n");
(void) fflush(stderr);
}
#endif
semaphore_info->id=GetMagickThreadId();
semaphore_info->reference_count++;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A l l o c a t e S e m a p h o r e I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AllocateSemaphoreInfo() initializes the SemaphoreInfo structure.
%
% The format of the AllocateSemaphoreInfo method is:
%
% SemaphoreInfo *AllocateSemaphoreInfo(void)
%
*/
MagickExport SemaphoreInfo *AllocateSemaphoreInfo(void)
{
SemaphoreInfo
*semaphore_info;
/*
Allocate semaphore.
*/
semaphore_info=(SemaphoreInfo *) AcquireAlignedMemory(1,
sizeof(SemaphoreInfo));
if (semaphore_info == (SemaphoreInfo *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(semaphore_info,0,sizeof(SemaphoreInfo));
/*
Initialize the semaphore.
*/
#if defined(MAGICKCORE_HAVE_PTHREAD)
{
int
status;
pthread_mutexattr_t
mutex_info;
status=pthread_mutexattr_init(&mutex_info);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
status=pthread_mutex_init(&semaphore_info->mutex,&mutex_info);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
status=pthread_mutexattr_destroy(&mutex_info);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
}
#elif defined(MAGICKCORE_HAVE_WINTHREADS)
InitializeCriticalSection(&semaphore_info->mutex);
#endif
semaphore_info->id=GetMagickThreadId();
semaphore_info->reference_count=0;
semaphore_info->signature=MagickSignature;
return(semaphore_info);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% L o c k S e m a p h o r e I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% LockSemaphoreInfo() locks a semaphore.
%
% The format of the LockSemaphoreInfo method is:
%
% MagickBooleanType LockSemaphoreInfo(SemaphoreInfo *semaphore_info)
%
% A description of each parameter follows:
%
% o semaphore_info: Specifies a pointer to an SemaphoreInfo structure.
%
*/
MagickExport MagickBooleanType LockSemaphoreInfo(SemaphoreInfo *semaphore_info)
{
assert(semaphore_info != (SemaphoreInfo *) NULL);
assert(semaphore_info->signature == MagickSignature);
#if defined(MAGICKCORE_HAVE_PTHREAD)
{
int
status;
status=pthread_mutex_lock(&semaphore_info->mutex);
if (status != 0)
return(MagickFalse);
#if defined(MAGICKCORE_DEBUG)
{
if ((semaphore_info->reference_count > 0) &&
(IsMagickThreadEqual(semaphore_info->id) != MagickFalse))
{
(void) fprintf(stderr,"Warning: unexpected recursive lock!\n");
(void) fflush(stderr);
}
}
#endif
}
#elif defined(MAGICKORE_HAVE_WINTHREADS)
{
EnterCriticalSection(&semaphore_info->mutex);
#if defined(MAGICKCORE_DEBUG)
{
if ((semaphore_info->reference_count > 0) &&
(IsMagickThreadEqual(semaphore_info->id) != MagickFalse))
{
(void) fprintf(stderr,"Warning: unexpected recursive lock!\n");
(void) fflush(stderr);
}
}
#endif
}
#endif
semaphore_info->id=GetMagickThreadId();
semaphore_info->reference_count++;
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A l l o c a t e S e m a p h o r e I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AllocateSemaphoreInfo() initializes the SemaphoreInfo structure.
%
% The format of the AllocateSemaphoreInfo method is:
%
% SemaphoreInfo *AllocateSemaphoreInfo(void)
%
*/
MagickExport SemaphoreInfo *AllocateSemaphoreInfo(void)
{
SemaphoreInfo
*semaphore_info;
/*
Allocate semaphore.
*/
semaphore_info=(SemaphoreInfo *) malloc(sizeof(SemaphoreInfo));
if (semaphore_info == (SemaphoreInfo *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(semaphore_info,0,sizeof(SemaphoreInfo));
/*
Initialize the semaphore.
*/
#if defined(MAGICKCORE_THREAD_SUPPORT)
{
int
status;
pthread_mutexattr_t
mutex_info;
status=pthread_mutexattr_init(&mutex_info);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
#if defined(MAGICKCORE_DEBUG)
#if defined(PTHREAD_MUTEX_ERRORCHECK)
status=pthread_mutex_settype(&mutex_info,PTHREAD_MUTEX_ERRORCHECK);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
#endif
#endif
status=pthread_mutex_init(&semaphore_info->mutex,&mutex_info);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
status=pthread_mutexattr_destroy(&mutex_info);
if (status != 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
}
#elif defined(MAGICKCORE_HAVE_WINTHREADS)
{
int
status;
status=InitializeCriticalSectionAndSpinCount(&semaphore_info->mutex,0x0400);
if (status == 0)
{
errno=status;
ThrowFatalException(ResourceLimitFatalError,
"UnableToInitializeSemaphore");
}
}
#endif
semaphore_info->id=GetMagickThreadId();
semaphore_info->reference_count=0;
semaphore_info->signature=MagickSignature;
return(semaphore_info);
}
