binary_plugin_handle.h

 
#ifndef _BINARY_PLUGIN_HANDLE_H
#define _BINARY_PLUGIN_HANDLE_H
/*
 * Fledge plugin handle related
 *
 * Copyright (c) 2018 OSisoft, LLC
 *
 * Released under the Apache 2.0 Licence
 *
 * Author: Amandeep Singh Arora
 */
#include <logger.h>
#include <dlfcn.h>
#include <plugin_handle.h>
#include <plugin_manager.h>
 
class BinaryPluginHandle : public PluginHandle
{
    public:
        // for the Storage plugin
        BinaryPluginHandle(const char *name, const char *path, tPluginType type) {
            dlerror();  // Clear the existing error
            handle = dlopen(path, RTLD_LAZY);
            if (!handle)
            {
                Logger::getLogger()->error("Unable to load storage plugin %s, %s",
                        name, dlerror());
            }
 
            Logger::getLogger()->debug("%s - storage plugin / RTLD_LAZY - name :%s: path :%s:", __FUNCTION__, name, path);
        }
 
        // for all the others plugins
        BinaryPluginHandle(const char *name, const char *path)                   {
            dlerror();  // Clear the existing error
            handle = dlopen(path, RTLD_LAZY|RTLD_GLOBAL);
            if (!handle)
            {
                Logger::getLogger()->error("Unable to load plugin %s, %s",
                        name, dlerror());
            }
 
            Logger::getLogger()->debug("%s - other plugin / RTLD_LAZY|RTLD_GLOBAL - name :%s: path :%s:", __FUNCTION__, name, path);
        }
 
        ~BinaryPluginHandle() { if (handle) dlclose(handle); }
        void *GetInfo() { return dlsym(handle, "plugin_info"); }
        void *ResolveSymbol(const char* sym) { return dlsym(handle, sym); }
        void *getHandle() { return handle; }
    private:
        PLUGIN_HANDLE handle; // pointer returned by dlopen on plugin shared lib
 
};
 
#endif