added: plugin mechanism

files: core/plugin.h core/plugin.cpp core/pluginmsg.h
added: directory 'main' with main.cpp (moved from 'core' directory)
changed: the way of building
       nearly everything is in cmslu.so
       only main() is in cmslu and is dynamically linked with cmslu.so



git-svn-id: svn://ttmath.org/publicrep/cmslu/trunk@516 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/plugin.h

@@ -0,0 +1,91 @@
+/*
+ * This file is a part of CMSLU -- Content Management System like Unix
+ * and is not publicly distributed
+ * 
+ * Copyright (c) 2008-2009, Tomasz Sowa
+ * All rights reserved.
+ * 
+ */
+ 
+
+#ifndef headerfilecmsluplugin
+#define headerfilecmsluplugin
+
+#include <vector>
+#include <string>
+#include <map>
+#include "request.h"
+#include "data.h"
+#include "pluginmsg.h"
+#include "log.h"
+
+
+
+class Plugin;
+
+
+// plugin arguments
+struct Arg
+{
+	void * app;		// used for some purposes
+	void * app2;	// used for some purposes
+	void * app3;	// used for some purposes
+	
+	int ret_true;	// how many plugins returned true
+	int ret_false;	// how many plugins returned false
+	
+	
+	void Clear()
+	{
+		app       = 0;
+		app2      = 0;
+		app3      = 0;
+		ret_true  = 0;
+		ret_false = 0;
+	}
+};
+
+
+
+class Plugin
+{
+public:	
+
+	typedef bool (*Fun)(Arg *);
+
+
+
+	Plugin();
+	~Plugin();
+	void LoadPlugin(const char * filename);
+	void LoadPlugin(const std::string & filename);
+	void LoadPlugins(const std::vector<std::string> & plugins);
+	
+	void UnloadPlugins();
+	
+	Arg * Call(int message, void * a=0, void * a2=0, void * a3=0);
+	
+	
+	void Assign(int message, Fun);
+
+private:	
+
+
+	typedef std::vector<void*> Plugins;
+	Plugins plugins;
+	
+	typedef std::multimap<int, Fun> Slots;
+	Slots slots;
+	
+	
+	Arg arg;
+	
+};
+
+
+
+
+extern Plugin plugin;
+
+#endif
+