/*========================================================================= Program: KWSys - Kitware System Library Module: $RCSfile$ Copyright (c) Kitware, Inc., Insight Consortium. All rights reserved. See Copyright.txt or http://www.kitware.com/Copyright.htm for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the above copyright notices 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