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/*
Copyright 2009 - 2010 Sun Microsystems, Inc. All rights reserved.
The MySQL Connector/C++ is licensed under the terms of the GPL
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
MySQL Connectors. There are special exceptions to the terms and
conditions of the GPL as it is applied to this software, see the
FLOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
*/
#include "binding_config.h"
#ifndef MYSQLCLIENT_STATIC_BINDING
#include <string>
#include <stdexcept>
// Needed to make SetDllDirectory available
#define _WIN32_WINNT 0x0502
#include "library_loader.h"
/* TODO consider using of dlopen, dlsym and dlclose definitions in my_global.h
* sort of doesn't like that.
*/
#ifndef _WIN32
#define LoadLibrary(p) ::dlopen(p, RTLD_LAZY)
#define FreeLibrary(p) ::dlclose(p)
#define GetProcAddress(p1,p2) ::dlsym(p1,p2)
#endif
namespace sql {
namespace mysql {
namespace util {
std::string ErrorMessage()
{
#ifdef _WIN32
TCHAR buffer[255];
DWORD _errcode = GetLastError();
::FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
NULL, _errcode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
buffer, sizeof(buffer), NULL);
return buffer;
#else
return dlerror();
#endif
}
/* {{{ LibraryLoader::LibraryLoader() */
LibraryLoader::LibraryLoader(const std::string & path2libFile)
: loadedLibHandle (NULL)
{
if ((loadedLibHandle = LoadLibrary(path2libFile.c_str())) == NULL) {
throw std::runtime_error("Couldn't load library " + path2libFile + ": " + ErrorMessage());
}
}
/* }}} */
/* {{{ LibraryLoader::LibraryLoader() */
LibraryLoader::LibraryLoader(const std::string & dir2look, const std::string & libFileName)
: loadedLibHandle(NULL)
{
#if _WIN32
SetDllDirectory(dir2look.c_str());
if ((loadedLibHandle= LoadLibrary(libFileName.c_str())) == NULL) {
#else
std::string fullname(dir2look);
fullname += "/";
fullname += libFileName;
if ((loadedLibHandle = LoadLibrary(fullname.c_str())) == NULL) {
#endif
throw std::runtime_error("Couldn't load library " + libFileName + ": " + ErrorMessage());
}
}
/* }}} */
/* {{{ LibraryLoader::~LibraryLoader() */
LibraryLoader::~LibraryLoader()
{
FreeLibrary(loadedLibHandle);
}
/* }}} */
/* {{{ LibraryLoader::GetProcAddr() */
SymbolHandle
LibraryLoader::GetProcAddr(const std::string & name)
{
if (loadedLibHandle == NULL) {
return NULL;
}
ProcCache::const_iterator cit = functions.find(name);
if (cit != functions.end()) {
return cit->second;
}
SymbolHandle proc = GetProcAddress(loadedLibHandle, name.c_str());
if (proc == NULL) {
throw std::runtime_error("Couldn't find symbol " + name);
}
functions.insert(std::make_pair(name, proc));
return proc;
}
/* }}} */
} /* namespace util */
} /* namespace mysql */
} /* namespace sql */
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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