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/********************************************************************************
* *
* D y n a m i c L i n k L i b r a r y S u p p o r t *
* *
*********************************************************************************
* Copyright (C) 2002,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#ifndef FXDLL_H
#define FXDLL_H
namespace FX {
/**
* Wrap library module handle to allow various operations
* on libraries to be performed.
*/
class FXAPI FXDLL {
private:
void *hnd;
public:
/// Construct with no handle
FXDLL():hnd(nullptr){}
/// Construct with existing handle
FXDLL(void *h):hnd(h){}
/// Construct copy from original
FXDLL(const FXDLL& org):hnd(org.hnd){}
/// Return the name of the library module
FXString name() const;
/// Return library module handle
void* handle() const { return hnd; }
/// True if library was loaded
FXbool loaded() const { return hnd!=nullptr; }
/// Load the library module from the name
FXbool load(const FXString& nm);
/// Unload the library module
void unload();
/// Return the address of the symbol in this library module
void* address(const FXchar* sym) const;
void* address(const FXString& sym) const;
/// Return the symbol name of the given address
static FXString symbol(void *addr);
/// Return the name of the library module containing the address
static FXString name(void *addr);
/// Find DLL containing symbol
static FXDLL dll(void* addr);
/// Find DLL of ourselves
static FXDLL dll();
/// Return error message if error occurred loading the library module
static FXString error();
};
/**
* Auto DLL wraps a library module handle but also owns it; thus, the library
* module will automatically be unloaded when auto-dll is destroyed.
*/
class FXAPI FXAUTODLL : public FXDLL {
private:
FXAUTODLL(const FXAUTODLL&);
FXAUTODLL &operator=(const FXAUTODLL&);
public:
/// Initialize by loading given library name
FXAUTODLL(const FXString& nm);
/// Unload library if we have one
~FXAUTODLL();
};
}
#endif
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