pluginhelper.h

linux下C++实现插件技术,详情请见http://masterdog.bokee.com/563395.html

#ifndef __PLUGINHELPER_H__
#define __PLUGINHELPER_H__

#include <iostream>
#include <string>
#include <vector>
#include <map>

#include <dlfcn.h>

#define BUF_SIZE 1024

typedef	void* CreateOBJ_T(const char * strClassName);
typedef	void  DeleteOBJ_T(void * p);

class CPluginHelper
{
public:

    CPluginHelper();
    ~CPluginHelper();
    
public:    
    
    /* load so-library file(s)
     *
     * @param dir:     path of so-library
     * @param pattern: name of so-library file(s), such as '*.so', 'aaa.so'
     *
     */
    void Load( const std::string & dir, const std::string & pattern );
    
    /* unload so-library file(s)
     *
     * @param dir:     path of so-library
     * @param pattern: name of so-library file(s), such as '*.so', 'aaa.so'
     *
     */
    void Unload( const std::string & dir, const std::string & pattern );
    
    /* create object from so-library file(s) by class name
     *
     * @param className:   class name 
     *
     * @return:            void-type pointer which references to the new created object 
     *
     */
    void * Create( const std::string & className );
    
private:

    /* get list of filename by pattern
     *
     * @param dir:     path of so-library 
     * @param pattern: name of so-library file(s), such as '*.so', 'aaa.so' 
     *
     * @return:        list of file name
     *
     */
    std::vector< std::string > GetFileNameByPattern( std::string dir, const std::string & pattern );
    
    /* a cache table mapping so-library file'name to its handle */
    std::map< std::string, void* > m_SoNameTable;
    
    /* a cache table mapping class-name to some so-library file handle */
    std::map< std::string, void* > m_ClassNameTable;
  
};

#endif /* __PLUGINHELPER_H__ */