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-rw-r--r--Source/cmDynamicLoader.cxx234
-rw-r--r--Source/cmDynamicLoader.h80
2 files changed, 314 insertions, 0 deletions
diff --git a/Source/cmDynamicLoader.cxx b/Source/cmDynamicLoader.cxx
new file mode 100644
index 0000000000..321faf016e
--- /dev/null
+++ b/Source/cmDynamicLoader.cxx
@@ -0,0 +1,234 @@
+/*=========================================================================
+
+ Program: Insight Segmentation & Registration Toolkit
+ Module: $RCSfile$
+ Language: C++
+ Date: $Date$
+ Version: $Revision$
+
+ Copyright (c) 2002 Insight Consortium. All rights reserved.
+ See ITKCopyright.txt or http://www.itk.org/HTML/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.
+
+=========================================================================*/
+#include "cmDynamicLoader.h"
+
+// This file is actually 3 different implementations.
+// 1. HP machines which uses shl_load
+// 2. Apple OSX which uses NSLinkModule
+// 3. Windows which uses LoadLibrary
+// 4. Most unix systems which use dlopen (default )
+// Each part of the ifdef contains a complete implementation for
+// the static methods of cmDynamicLoader.
+
+// ---------------------------------------------------------------
+// 1. Implementation for HPUX machines
+#ifdef __hpux
+#define CMDYNAMICLOADER_DEFINED 1
+#include <dl.h>
+
+cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
+{
+ return shl_load(libname, BIND_DEFERRED | DYNAMIC_PATH, 0L);
+}
+
+int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
+{
+ return 0;
+}
+
+void* cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
+{
+ void* addr;
+ int status;
+
+ status = shl_findsym (&lib, sym, TYPE_PROCEDURE, &addr);
+ return (status < 0) ? (void*)0 : addr;
+}
+
+const char* cmDynamicLoader::LibPrefix()
+{
+ return "lib";
+}
+
+const char* cmDynamicLoader::LibExtension()
+{
+ return ".sl";
+}
+
+const char* cmDynamicLoader::LastError()
+{
+ return 0;
+}
+#endif
+
+
+
+// ---------------------------------------------------------------
+// 2. Implementation for Darwin (including OSX) Machines
+
+#ifdef __APPLE__
+#define CMDYNAMICLOADER_DEFINED
+#include <mach-o/dyld.h>
+
+cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
+{
+ NSObjectFileImageReturnCode rc;
+ NSObjectFileImage image;
+
+ rc = NSCreateObjectFileImageFromFile(libname, &image);
+ return NSLinkModule(image, libname, TRUE);
+}
+
+int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
+{
+ return 0;
+}
+
+void* cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
+{
+ void *result=0;
+ if(NSIsSymbolNameDefined(sym)){
+ cout << sym << " is defined!" << endl;
+ NSSymbol symbol= NSLookupAndBindSymbol(sym);
+ if(symbol){
+ result = NSAddressOfSymbol(symbol);
+ }
+ }else{
+ cout << sym << " is not defined!" << endl;
+ }
+ return result;
+}
+
+const char* cmDynamicLoader::LibPrefix()
+{
+ return "";
+}
+
+const char* cmDynamicLoader::LibExtension()
+{
+ return ".dylib";
+}
+
+const char* cmDynamicLoader::LastError()
+{
+ return 0;
+}
+
+#endif
+
+
+
+
+// ---------------------------------------------------------------
+// 3. Implementation for Windows win32 code
+#ifdef _WIN32
+#include <windows.h>
+#define CMDYNAMICLOADER_DEFINED 1
+
+cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
+{
+#ifdef UNICODE
+ wchar_t *libn = new wchar_t [mbstowcs(NULL, libname, 32000)];
+ mbstowcs(libn, libname, 32000);
+ cmLibHandle ret = LoadLibrary(libn);
+ delete [] libn;
+ return ret;
+#else
+ return LoadLibrary(libname);
+#endif
+}
+
+int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
+{
+ return (int)FreeLibrary(lib);
+}
+
+void* cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
+{
+#ifdef UNICODE
+ wchar_t *wsym = new wchar_t [mbstowcs(NULL, sym, 32000)];
+ mbstowcs(wsym, sym, 32000);
+ void *ret = GetProcAddress(lib, wsym);
+ delete [] wsym;
+ return ret;
+#else
+ return GetProcAddress(lib, sym);
+#endif
+}
+
+const char* cmDynamicLoader::LibPrefix()
+{
+ return "";
+}
+
+const char* cmDynamicLoader::LibExtension()
+{
+ return ".dll";
+}
+
+const char* cmDynamicLoader::LastError()
+{
+ LPVOID lpMsgBuf;
+
+ FormatMessage(
+ FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+ NULL,
+ GetLastError(),
+ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
+ (LPTSTR) &lpMsgBuf,
+ 0,
+ NULL
+ );
+
+ // Free the buffer.
+ LocalFree( lpMsgBuf );
+ static char* str = 0;
+ delete [] str;
+ str = strcpy(new char[strlen((char*)lpMsgBuf)+1], (char*)lpMsgBuf);
+ return str;
+}
+
+#endif
+
+// ---------------------------------------------------------------
+// 4. Implementation for default UNIX machines.
+// if nothing has been defined then use this
+#ifndef CMDYNAMICLOADER_DEFINED
+#define CMDYNAMICLOADER_DEFINED
+// Setup for most unix machines
+#include <dlfcn.h>
+
+cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
+{
+ return dlopen(libname, RTLD_LAZY);
+}
+
+int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
+{
+ return (int)dlclose(lib);
+}
+
+void* cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
+{
+ return dlsym(lib, sym);
+}
+
+const char* cmDynamicLoader::LibPrefix()
+{
+ return "lib";
+}
+
+const char* cmDynamicLoader::LibExtension()
+{
+ return ".so";
+}
+
+const char* cmDynamicLoader::LastError()
+{
+ return dlerror();
+}
+#endif
diff --git a/Source/cmDynamicLoader.h b/Source/cmDynamicLoader.h
new file mode 100644
index 0000000000..d5cc61246c
--- /dev/null
+++ b/Source/cmDynamicLoader.h
@@ -0,0 +1,80 @@
+/*=========================================================================
+
+ Program: Insight Segmentation & Registration Toolkit
+ Module: $RCSfile$
+ Language: C++
+ Date: $Date$
+ Version: $Revision$
+
+ Copyright (c) 2002 Insight Consortium. All rights reserved.
+ See ITKCopyright.txt or http://www.itk.org/HTML/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.
+
+=========================================================================*/
+// .NAME cmDynamicLoader - class interface to system dynamic libraries
+// .SECTION Description
+// cmDynamicLoader provides a portable interface to loading dynamic
+// libraries into a process.
+
+
+#ifndef __cmDynamicLoader_h
+#define __cmDynamicLoader_h
+
+#include "cmStandardIncludes.h"
+
+// Ugly stuff for library handles
+// They are different on several different OS's
+#if defined(__hpux)
+# include <dl.h>
+ typedef shl_t cmLibHandle;
+#elif defined(_WIN32)
+ #include <windows.h>
+ typedef HMODULE cmLibHandle;
+#else
+ typedef void* cmLibHandle;
+#endif
+
+class cmDynamicLoader
+{
+public:
+ // Description:
+ // Load a dynamic library into the current process.
+ // The returned cmLibHandle can be used to access the symbols in the
+ // library.
+ static cmLibHandle OpenLibrary(const char*);
+
+ // Description:
+ // Attempt to detach a dynamic library from the
+ // process. A value of true is returned if it is successful.
+ static int CloseLibrary(cmLibHandle);
+
+ // Description:
+ // Find the address of the symbol in the given library
+ static void* GetSymbolAddress(cmLibHandle, const char*);
+
+ // Description:
+ // Return the library prefix for the given architecture
+ static const char* LibPrefix();
+
+ // Description:
+ // Return the library extension for the given architecture
+ static const char* LibExtension();
+
+ // Description:
+ // Return the last error produced from a calls made on this class.
+ static const char* LastError();
+
+protected:
+ cmDynamicLoader() {};
+ ~cmDynamicLoader() {};
+
+
+private:
+ cmDynamicLoader(const cmDynamicLoader&); // Not implemented.
+ void operator=(const cmDynamicLoader&); // Not implemented.
+};
+
+#endif
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