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/*=========================================================================
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 several 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;
}
cmDynamicLoaderFunction
cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
{
void* addr;
int status;
status = shl_findsym (&lib, sym, TYPE_PROCEDURE, &addr);
void* result = (status < 0) ? (void*)0 : addr;
// Hack to cast pointer-to-data to pointer-to-function.
return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
}
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;
}
cmDynamicLoaderFunction
cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
{
void *result=0;
if(NSIsSymbolNameDefined(sym))
{
NSSymbol symbol= NSLookupAndBindSymbol(sym);
if(symbol)
{
result = NSAddressOfSymbol(symbol);
}
}
// Hack to cast pointer-to-data to pointer-to-function.
return *reinterpret_cast<cmDynamicLoaderFunction*>(&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);
}
cmDynamicLoaderFunction
cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
{
void* result = 0;
#ifdef UNICODE
wchar_t *wsym = new wchar_t [mbstowcs(NULL, sym, 32000)];
mbstowcs(wsym, sym, 32000);
void *ret = GetProcAddress(lib, wsym);
delete [] wsym;
result = ret;
#else
result = GetProcAddress(lib, sym);
#endif
// Hack to cast pointer-to-data to pointer-to-function.
return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
}
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);
}
cmDynamicLoaderFunction
cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
{
void* result = dlsym(lib, sym);
// Hack to cast pointer-to-data to pointer-to-function.
return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
}
const char* cmDynamicLoader::LibPrefix()
{
return "lib";
}
const char* cmDynamicLoader::LibExtension()
{
return ".so";
}
const char* cmDynamicLoader::LastError()
{
return dlerror();
}
#endif
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