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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.
=========================================================================*/
// This file is actually 4 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.
// 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
typedef void (*cmDynamicLoaderFunction)();
// ---------------------------------------------------------------
// 1. Implementation for HPUX machines
#ifdef __hpux
#define CMDYNAMICLOADER_DEFINED 1
#include <dl.h>
cmDynamicLoaderFunction cmDynamicLoaderGetSymbolAddress(cmLibHandle lib,
const char* sym)
{
void* addr;
int status;
status = shl_findsym (&lib, sym, TYPE_PROCEDURE, &addr);
return (cmDynamicLoaderFunction)((status < 0) ? (void*)0 : addr);
}
#endif
// ---------------------------------------------------------------
// 2. Implementation for Darwin (including OSX) Machines
#ifdef __APPLE__
#define CMDYNAMICLOADER_DEFINED
#include <mach-o/dyld.h>
cmDynamicLoaderFunction cmDynamicLoaderGetSymbolAddress(cmLibHandle lib,
const char* sym)
{
void *result=0;
if(NSIsSymbolNameDefined(sym))
{
NSSymbol symbol= NSLookupAndBindSymbol(sym);
if(symbol)
{
result = NSAddressOfSymbol(symbol);
}
}
return (cmDynamicLoaderFunction)result;
}
#endif
// ---------------------------------------------------------------
// 3. Implementation for Windows win32 code
#ifdef _WIN32
#include <windows.h>
#define CMDYNAMICLOADER_DEFINED 1
cmDynamicLoaderFunction cmDynamicLoaderGetSymbolAddress(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 (cmDynamicLoaderFunction)ret;
#else
return (cmDynamicLoaderFunction)GetProcAddress(lib, sym);
#endif
}
#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>
cmDynamicLoaderFunction cmDynamicLoaderGetSymbolAddress(cmLibHandle lib,
const char* sym)
{
return (cmDynamicLoaderFunction)dlsym(lib, sym);
}
#endif
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