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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 default module prefix for the current platform. */
+ static const char* LibPrefix() { return "@KWSYS_DynamicLoader_PREFIX@"; }
+
+ /** Return the default module suffix for the current platform. */
+ static const char* LibExtension() { return "@KWSYS_DynamicLoader_SUFFIX@"; }
+
+ /** Return the last error produced from a calls made on this class. */
+ static const char* LastError();
+}; // End Class: DynamicLoader
+
+} // namespace @KWSYS_NAMESPACE@
+
+#endif