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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* 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.
*
*=========================================================================*/
#ifndef itkDynamicLoader_h
#define itkDynamicLoader_h
#include "itkObject.h"
#include "itkObjectFactory.h"
#include "itksys/DynamicLoader.hxx"
namespace itk
{
/** \class DynamicLoader
* \brief Portable loading of dynamic libraries or dll's.
*
* DynamicLoader provides a portable interface to loading dynamic
* libraries or dll's into a process.
*
* \ingroup OSSystemObjects
* \ingroup ITKCommon
*/
// BTX
using LibHandle = itksys::DynamicLoader::LibraryHandle;
// Cannot use this as this is a void (*)() but ITK old API used to be void*
using SymbolPointer = itksys::DynamicLoader::SymbolPointer;
// ETX
class ITKCommon_EXPORT DynamicLoader : public Object
{
public:
ITK_DISALLOW_COPY_AND_MOVE(DynamicLoader);
/** Standard class type aliases. */
using Self = DynamicLoader;
using Superclass = Object;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(DynamicLoader);
/** Load a dynamic library into the current process.
* The returned LibHandle can be used to access the symbols in the
* library. */
static LibHandle
OpenLibrary(const char *);
/** Attempt to detach a dynamic library from the
* process. A value of true is returned if it is successful. */
static int CloseLibrary(LibHandle);
/** Find the address of the symbol in the given library. */
static void *
GetSymbolAddress(LibHandle, const char *);
/** Return the library prefix for the given architecture */
static const char *
LibPrefix();
/** Return the library extension for the given architecture. */
static const char *
LibExtension();
/** Return the last error produced from a calls made on this class. */
static const char *
LastError();
protected:
DynamicLoader();
~DynamicLoader() override;
};
} // end namespace itk
#endif
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