CMake/Source/cmDynamicLoader.cxx

347 lines
8.1 KiB
C++
Raw Normal View History

2002-08-21 19:58:01 +04:00
/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
2002-08-21 19:58:01 +04:00
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
2002-08-21 19:58:01 +04:00
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.
2002-08-21 19:58:01 +04:00
// 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.
class cmDynamicLoaderCache
{
public:
~cmDynamicLoaderCache();
void CacheFile(const char* path, const cmLibHandle&);
bool GetCacheFile(const char* path, cmLibHandle&);
bool FlushCache(const char* path);
void FlushCache();
static cmDynamicLoaderCache* GetInstance();
private:
std::map<cmStdString, cmLibHandle> m_CacheMap;
static cmDynamicLoaderCache* Instance;
};
cmDynamicLoaderCache* cmDynamicLoaderCache::Instance = 0;
cmDynamicLoaderCache::~cmDynamicLoaderCache()
{
}
void cmDynamicLoaderCache::CacheFile(const char* path, const cmLibHandle& p)
{
cmLibHandle h;
if ( this->GetCacheFile(path, h) )
{
this->FlushCache(path);
}
this->m_CacheMap[path] = p;
}
bool cmDynamicLoaderCache::GetCacheFile(const char* path, cmLibHandle& p)
{
std::map<cmStdString, cmLibHandle>::iterator it = m_CacheMap.find(path);
if ( it != m_CacheMap.end() )
{
p = it->second;
return true;
}
return false;
}
bool cmDynamicLoaderCache::FlushCache(const char* path)
{
std::map<cmStdString, cmLibHandle>::iterator it = m_CacheMap.find(path);
bool ret = false;
if ( it != m_CacheMap.end() )
{
cmDynamicLoader::CloseLibrary(it->second);
m_CacheMap.erase(it);
ret = true;
}
return ret;
}
void cmDynamicLoaderCache::FlushCache()
{
for ( std::map<cmStdString, cmLibHandle>::iterator it = m_CacheMap.begin();
it != m_CacheMap.end(); it++ )
{
cmDynamicLoader::CloseLibrary(it->second);
}
delete cmDynamicLoaderCache::Instance;
cmDynamicLoaderCache::Instance = 0;
}
cmDynamicLoaderCache* cmDynamicLoaderCache::GetInstance()
{
if ( !cmDynamicLoaderCache::Instance )
{
cmDynamicLoaderCache::Instance = new cmDynamicLoaderCache;
}
return cmDynamicLoaderCache::Instance;
}
2002-08-21 19:58:01 +04:00
// ---------------------------------------------------------------
// 1. Implementation for HPUX machines
#ifdef __hpux
#define CMDYNAMICLOADER_DEFINED 1
#include <dl.h>
cmLibHandle cmDynamicLoader::OpenLibrary(const char* libname )
{
cmLibHandle lh;
if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
{
return lh;
}
lh = shl_load(libname, BIND_DEFERRED | DYNAMIC_PATH, 0L);
cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
return lh;
2002-08-21 19:58:01 +04:00
}
int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
{
2004-07-19 21:00:32 +04:00
return !shl_unload(lib);
2002-08-21 19:58:01 +04:00
}
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);
}
2002-08-21 19:58:01 +04:00
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 )
{
cmLibHandle lh;
if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
{
return lh;
}
2002-08-21 19:58:01 +04:00
NSObjectFileImageReturnCode rc;
NSObjectFileImage image = 0;
2002-08-21 19:58:01 +04:00
rc = NSCreateObjectFileImageFromFile(libname, &image);
if(!image)
{
return 0;
}
lh = NSLinkModule(image, libname, TRUE);
if(lh)
{
cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
}
return lh;
2002-08-21 19:58:01 +04:00
}
int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
{
2003-04-17 16:47:15 +04:00
// we have to use lib because the macro may not...
(void)lib;
NSUnLinkModule((NSModule)lib, FALSE);
2004-07-19 21:00:32 +04:00
return 1;
2002-08-21 19:58:01 +04:00
}
cmDynamicLoaderFunction
2003-04-17 00:20:37 +04:00
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);
}
2002-08-21 19:58:01 +04:00
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 )
{
cmLibHandle lh;
if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
{
return lh;
}
2002-08-21 19:58:01 +04:00
#ifdef UNICODE
wchar_t *libn = new wchar_t [mbstowcs(NULL, libname, 32000)];
mbstowcs(libn, libname, 32000);
cmLibHandle ret = LoadLibrary(libn);
delete [] libn;
lh = ret;
2002-08-21 19:58:01 +04:00
#else
lh = LoadLibrary(libname);
2002-08-21 19:58:01 +04:00
#endif
cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
return lh;
2002-08-21 19:58:01 +04:00
}
int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
{
return (int)FreeLibrary(lib);
}
cmDynamicLoaderFunction
cmDynamicLoader::GetSymbolAddress(cmLibHandle lib, const char* sym)
{
#ifdef UNICODE
2003-05-28 17:21:37 +04:00
wchar_t *wsym = new wchar_t [mbstowcs(NULL, sym, 32000)];
mbstowcs(wsym, sym, 32000);
void *ret = GetProcAddress(lib, wsym);
delete [] wsym;
void* result = ret;
#else
void* result = (void*)GetProcAddress(lib, sym);
#endif
// Hack to cast pointer-to-data to pointer-to-function.
return *reinterpret_cast<cmDynamicLoaderFunction*>(&result);
}
2002-08-21 19:58:01 +04:00
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.
2002-12-06 00:52:55 +03:00
2002-08-21 19:58:01 +04:00
static char* str = 0;
delete [] str;
2002-12-06 00:52:55 +03:00
str = strcpy(new char[strlen((char*)lpMsgBuf)+1], (char*)lpMsgBuf);
LocalFree( lpMsgBuf );
2002-08-21 19:58:01 +04:00
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 )
{
cmLibHandle lh;
if ( cmDynamicLoaderCache::GetInstance()->GetCacheFile(libname, lh) )
{
return lh;
}
lh = dlopen(libname, RTLD_LAZY);
cmDynamicLoaderCache::GetInstance()->CacheFile(libname, lh);
return lh;
2002-08-21 19:58:01 +04:00
}
int cmDynamicLoader::CloseLibrary(cmLibHandle lib)
{
2004-07-19 21:00:32 +04:00
return !(int)dlclose(lib);
2002-08-21 19:58:01 +04:00
}
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);
}
2002-08-21 19:58:01 +04:00
const char* cmDynamicLoader::LastError()
{
return dlerror();
}
#endif
2002-09-24 18:24:56 +04:00
void cmDynamicLoader::FlushCache()
{
cmDynamicLoaderCache::GetInstance()->FlushCache();
}
// Stay consistent with the Modules/Platform directory as
// to what the correct prefix and lib extension
const char* cmDynamicLoader::LibPrefix()
{
return CMAKE_SHARED_MODULE_PREFIX;
}
const char* cmDynamicLoader::LibExtension()
{
return CMAKE_SHARED_MODULE_SUFFIX;
}