added: a deadlock counter to Synchro class

now we can use Lock() more than one in the same thread
       and next Unlock() will recognize it
       sample:
       Lock(); // first lock -- resources locked
       Lock(); // second lock -- skipped (counter incremented)
       ...
       Unlock(); // first unlock -- skipped (because counter greater than zero)
       Unlock(); // second unlock -- actually unlocking


git-svn-id: svn://ttmath.org/publicrep/winix/trunk@830 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/plugin.cpp

@@ -98,6 +98,21 @@ void Plugin::SetSessionManager(SessionManager * psession_manager)
 
 
 
+void Plugin::Lock()
+{
+	if( synchro )
+		synchro->Lock();
+}
+
+
+void Plugin::Unlock()
+{
+	if( synchro )
+		synchro->Unlock();
+}
+
+
+
 
 bool Plugin::SetPointers(PluginInfo & info)
 {
@@ -105,7 +120,11 @@ bool Plugin::SetPointers(PluginInfo & info)
 	bool res = (db && config && cur && system && functions && templates && synchro && session_manager);
 
 	if( !res )
+	{
+		Lock();
 		log << log1 << "Plugin: cannot call a function - some of the winix pointers are null" << logend;
+		Unlock();
+	}
 
 	info.db        = db;
 	info.config    = config;
@@ -145,7 +164,8 @@ void Plugin::LoadPlugin(const std::string & filename)
 }
 
 
-
+// we don't have to use Lock() here because plusings are read
+// before threads are started
 void * Plugin::LoadInitFun(const char * filename, Fun1 & fun_init)
 {
 	void * p = dlopen(filename, RTLD_NOW | RTLD_LOCAL);
@@ -265,7 +285,11 @@ void Plugin::Call(Session * ses, int message, Slots::iterator & slot, PluginInfo
 	if( !slot->second.is_running )
 	{
 		if( config->log_plugin_call )
+		{
+			Lock();
 			log << log1 << "Plugin: calling plugin id: " << slot->second.index << ", message: " << message << logend;
+			Unlock();
+		}
 
 		slot->second.is_running = true;
 
@@ -278,15 +302,21 @@ void Plugin::Call(Session * ses, int message, Slots::iterator & slot, PluginInfo
 		slot->second.is_running = false;
 
 		if( config->log_plugin_call )
+		{
+			Lock();
 			log << log1 << "Plugin: returning from plugin id: " << slot->second.index << ", message: " << message
 				<< ", result: " << (info.res? "true" : "false") << logend;
+			Unlock();
+		}
 
 	}
 	else
 	{
+		Lock();
 		log << log1 << "Plugin: id: " << slot->second.index
 			<< ", message: " << message
 			<< ", recurrences are not allowed" << logend;
+		Unlock();
 	}
 }
 
@@ -430,10 +460,10 @@ size_t Plugin::Size()
 
 
 /*
-	!! IMPROVE ME
-	Assign() can work only if other threads are not started
-	we can add some barrier/flag so when other threads starts
-	then we cannot use Assign() method
+       !! IMPROVE ME
+       Assign() can work only if other threads are not started
+       we can add some barrier/flag so when other threads starts
+       then we cannot use Assign() method
 */
 void Plugin::Assign(int message, Fun1 fun1)
 {