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/*============================================================================
KWSys - Kitware System Library
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#ifndef @KWSYS_NAMESPACE@_DynamicLoader_hxx
#define @KWSYS_NAMESPACE@_DynamicLoader_hxx
#include <@KWSYS_NAMESPACE@/Configure.h>
#if defined(__hpux)
#include <dl.h>
#elif defined(_WIN32) && !defined(__CYGWIN__)
#include <windows.h>
#elif defined(__APPLE__)
#include <AvailabilityMacros.h>
#if MAC_OS_X_VERSION_MAX_ALLOWED < 1030
#include <mach-o/dyld.h>
#endif
#elif defined(__BEOS__)
#include <be/kernel/image.h>
#endif
namespace @KWSYS_NAMESPACE@
{
/** \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.
*
* Directory currently works with Windows, Apple, HP-UX and Unix (POSIX)
* operating systems
*
* \warning dlopen on *nix system works the following way:
* If filename contains a slash ("/"), then it is interpreted as a (relative
* or absolute) pathname. Otherwise, the dynamic linker searches for the
* library as follows : see ld.so(8) for further details):
* Whereas this distinction does not exist on Win32. Therefore ideally you
* should be doing full path to garantee to have a consistent way of dealing
* with dynamic loading of shared library.
*
* \warning the Cygwin implementation do not use the Win32 HMODULE. Put extra
* condition so that we can include the correct declaration (POSIX)
*/
class @KWSYS_NAMESPACE@_EXPORT DynamicLoader
{
public:
// Ugly stuff for library handles
// They are different on several different OS's
#if defined(__hpux)
typedef shl_t LibraryHandle;
#elif defined(_WIN32) && !defined(__CYGWIN__)
typedef HMODULE LibraryHandle;
#elif defined(__APPLE__)
#if MAC_OS_X_VERSION_MAX_ALLOWED < 1030
typedef NSModule LibraryHandle;
#else
typedef void* LibraryHandle;
#endif
#elif defined(__BEOS__)
typedef image_id LibraryHandle;
#else // POSIX
typedef void* LibraryHandle;
#endif
// Return type from DynamicLoader::GetSymbolAddress.
typedef void (*SymbolPointer)();
/** Load a dynamic library into the current process.
* The returned LibraryHandle can be used to access the symbols in the
* library. */
static LibraryHandle OpenLibrary(const char*);
/** Attempt to detach a dynamic library from the
* process. A value of true is returned if it is sucessful. */
static int CloseLibrary(LibraryHandle);
/** Find the address of the symbol in the given library. */
static SymbolPointer GetSymbolAddress(LibraryHandle, 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();
}; // End Class: DynamicLoader
} // namespace @KWSYS_NAMESPACE@
#endif
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