testPlugin.cpp

/**
 * Testing the plugin interface
 * If you're using GCC/G++, specify the additional linker options:
 * 
 *      Indicate that this is a shared library:
 *          shared -s
 *
 *      Use the provided directive to export compiler symbols to the shared library:
 *          -DBUILD_PLUGIN
 * 
 *      Tell the linker to have all exported function symbols use the STDCALL
 *      calling convention for ABI compatibility (use only on Windows).
 *          -Wl,--add-stdcall-alias
 * 
 * g++ -std=c++11 -Wall -Werror -Wextra -pedantic -pedantic-errors -shared -s -DBUILD_PLUGIN -Wl,--add-stdcall-alias testPlugin.cpp -o testPlugin.dll
 * 
 *      Also, change the compiled output from ".dll" to ".so" on non-windows
 *      targets.
 */

#include <iostream>

#include "pluginAPI.h"

// Derive this class from the plugin base class in pluginAPI.h
class pluginTest final : virtual public plugin {
    
    // make sure the destructor is marked as virtual.
    virtual ~pluginTest();
    
    // override the base class method to print data to the console.
    virtual void printMessage() const override;
};

// D-tor
pluginTest::~pluginTest() {
}

// print message
void pluginTest::printMessage() const {
    std::cout << "Hello World!" << std::endl;
}

// Factory method to instantiate a "pluginTest" class
// It is important to do this from within the user-created library due to
// differences between compilers.
plugin* createPluginInstance() {
    return new pluginTest;
}

// Destruction method to destroy an instance of a "pluginTest" obect.
// It is important to do this from within the user-created library due to
// differences between compilers.
void destroyPluginInstance(plugin* const pPlugin) {
    delete pPlugin;
}