/usr/include/root/Reflex/SharedLibrary.h is in libroot-core-dev 5.34.14-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Author: Stefan Roiser 2006
// Copyright CERN, CH-1211 Geneva 23, 2004-2006, All rights reserved.
//
// Permission to use, copy, modify, and distribute this software for any
// purpose is hereby granted without fee, provided that this copyright and
// permissions notice appear in all copies and derivatives.
//
// This software is provided "as is" without express or implied warranty.
#ifndef Reflex_SharedLibrary
#define Reflex_SharedLibrary
// Include files
#ifdef _WIN32
# include <windows.h>
#else
# include <dlfcn.h>
# include <errno.h>
#endif
namespace Reflex {
/**
* @class SharedLibrary SharedLibrary.h Reflex/SharedLibrary.h
* @author Stefan Roiser
* @date 24/11/2006
* @ingroup Ref
* Parts of this implementation are copyied from SEAL (http://cern.ch/seal)
*/
class SharedLibrary {
public:
SharedLibrary(const std::string& libname);
bool Load();
bool Unload();
bool Symbol(const std::string& symname,
void*& sym);
std::string Error();
private:
/** a handle to the loaded library */
#ifdef _WIN32
HMODULE fHandle;
#else
void* fHandle;
#endif
/** the name of the shared library to handle */
std::string fLibName;
};
} // namespace Reflex
//-------------------------------------------------------------------------------
inline Reflex::SharedLibrary::SharedLibrary(const std::string& libname):
//-------------------------------------------------------------------------------
fHandle(0),
fLibName(libname) {
}
//-------------------------------------------------------------------------------
inline std::string
Reflex::SharedLibrary::Error() {
//-------------------------------------------------------------------------------
std::string errString;
#ifdef _WIN32
int error = ::GetLastError();
LPVOID lpMessageBuffer;
::FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
error,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), //The user default language
(LPTSTR) &lpMessageBuffer,
0,
NULL);
errString = (const char*) lpMessageBuffer;
// Free the buffer allocated by the system
::LocalFree(lpMessageBuffer);
#else
const char* err = dlerror();
if (err) {
errString = err;
}
#endif
return errString;
} // Error
//-------------------------------------------------------------------------------
inline bool
Reflex::SharedLibrary::Load() {
//-------------------------------------------------------------------------------
#ifdef _WIN32
::SetErrorMode(0);
fHandle = ::LoadLibrary(fLibName.c_str());
#else
fHandle = ::dlopen(fLibName.c_str(), RTLD_LAZY | RTLD_GLOBAL);
#endif
if (!fHandle) {
return false;
} else { return true; }
}
//-------------------------------------------------------------------------------
inline bool
Reflex::SharedLibrary::Symbol(const std::string& symname,
void*& sym) {
//-------------------------------------------------------------------------------
if (fHandle) {
#ifdef _WIN32
sym = GetProcAddress(fHandle, symname.c_str());
#else
sym = dlsym(fHandle, symname.c_str());
#endif
if (sym) {
return true;
}
}
return false;
}
//-------------------------------------------------------------------------------
inline bool
Reflex::SharedLibrary::Unload() {
//-------------------------------------------------------------------------------
#ifdef _WIN32
if (FreeLibrary(fHandle) == 0) {
return false;
}
#else
if (dlclose(fHandle) == -1) {
return false;
}
#endif
else { return true; }
}
#endif // Reflex_SharedLibrary
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