remove msleep, clean PIConditionVariable, rewrite pipipelinethread, etc...

libs/main/system/pisystemmonitor.cpp

@@ -145,9 +145,9 @@ bool PISystemMonitor::startOnSelf(int interval_ms) {
 
 
 PIVector<PISystemMonitor::ThreadStats> PISystemMonitor::threadsStatistic() const {
-	mutex_.lock();
+	lock();
 	PIVector<PISystemMonitor::ThreadStats> ret = cur_ts;
-	mutex_.unlock();
+	unlock();
 	return ret;
 }
 
@@ -341,9 +341,9 @@ void PISystemMonitor::run() {
 		//piCout << ts_new.cpu_load_user;
 	}
 	last_tm = cur_tm;
-	mutex_.lock();
+	lock();
 	cur_ts = cur_tm.values();
-	mutex_.unlock();
+	unlock();
 	tstat.ram_total = totalRAM();
 	tstat.ram_used = usedRAM();
 	tstat.ram_free = freeRAM();