LoadableModule.h

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/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef SQUID_LOADABLE_MODULE_H
#define SQUID_LOADABLE_MODULE_H
 
#include "SquidString.h"
 
// wrapper for dlopen(3), libltdl, and friends
class LoadableModule
{
public:
    LoadableModule(const String &aName);
    ~LoadableModule();           // unloads if loaded
 
    bool loaded() const;
    const String &name() const { return theName; }
    const String &error() const { return theError; }
 
    void load(); // throws Texc
    void unload(); // throws Texc
 
protected:
    String theName;
    String theError;
    void *theHandle;
 
private:
    void *openModule();
    bool closeModule();
    const char *errorMsg();
};
 
#endif