-#include <stdio.h>
-#include <signal.h>
-
+#include <cstdio>
+#include <cassert>
+#include <csignal>
 #include <ctime>
 #include <algorithm>
 
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
-PING_SETTINGS::PING_SETTINGS()
-    : pingDelay(0)
-{
-}
-//-----------------------------------------------------------------------------
 int PING_SETTINGS::ParseSettings(const MODULE_SETTINGS & s)
 {
 PARAM_VALUE pv;
 }
 //-----------------------------------------------------------------------------
 PING::PING()
-    : users(NULL),
+    : errorStr(),
+      pingSettings(),
+      settings(),
+      users(NULL),
+      usersList(),
+      thread(),
+      mutex(),
       nonstop(false),
       isRunning(false),
+      pinger(),
+      ChgCurrIPNotifierList(),
+      ChgIPNotifierList(),
       onAddUserNotifier(*this),
-      onDelUserNotifier(*this)
+      onDelUserNotifier(*this),
+      logger(GetPluginLogger(GetStgLogger(), "ping"))
 {
 pthread_mutex_init(&mutex, NULL);
 }
 pthread_mutex_destroy(&mutex);
 }
 //-----------------------------------------------------------------------------
-const std::string PING::GetVersion() const
-{
-return "Pinger v.1.01";
-}
-//-----------------------------------------------------------------------------
-void PING::SetSettings(const MODULE_SETTINGS & s)
-{
-settings = s;
-}
-//-----------------------------------------------------------------------------
 int PING::ParseSettings()
 {
 int ret = pingSettings.ParseSettings(settings);
 return ret;
 }
 //-----------------------------------------------------------------------------
-void PING::SetUsers(USERS * u)
-{
-users = u;
-}
-//-----------------------------------------------------------------------------
-const std::string & PING::GetStrError() const
-{
-return errorStr;
-}
-//-----------------------------------------------------------------------------
 int PING::Start()
 {
 GetUsers();
 if (pthread_create(&thread, NULL, Run, this))
     {
     errorStr = "Cannot start thread.";
+    logger("Cannot create thread.");
     printfd(__FILE__, "Cannot start thread\n");
     return -1;
     }
     nanosleep(&ts, NULL);
     }
 
-//after 5 seconds waiting thread still running. now kill it
-if (isRunning)
-    {
-    printfd(__FILE__, "kill PING thread.\n");
-    if (pthread_kill(thread, SIGINT))
-        {
-        errorStr = "Cannot kill PING thread.";
-        printfd(__FILE__, "Cannot kill PING thread.\n");
-        return -1;
-        }
-    printfd(__FILE__, "PING killed\n");
-    }
-
 users->DelNotifierUserAdd(&onAddUserNotifier);
 users->DelNotifierUserDel(&onDelUserNotifier);
 
     ++users_iter;
     }
 
+if (isRunning)
+    return -1;
+
 return 0;
 }
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 void * PING::Run(void * d)
 {
-PING * ping = (PING *)d;
+sigset_t signalSet;
+sigfillset(&signalSet);
+pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
+PING * ping = static_cast<PING *>(d);
 ping->isRunning = true;
 
 long delay = (10000000 * ping->pingSettings.GetPingDelay()) / 3 + 50000000;
 return NULL;
 }
 //-----------------------------------------------------------------------------
-uint16_t PING::GetStartPosition() const
-{
-return 100;
-}
-//-----------------------------------------------------------------------------
-uint16_t PING::GetStopPosition() const
-{
-return 100;
-}
-//-----------------------------------------------------------------------------
 void PING::SetUserNotifiers(USER_PTR u)
 {
 CHG_CURRIP_NOTIFIER_PING ChgCurrIPNotifier(*this, u);
 
 USER_PTR u;
 int h = users->OpenSearch();
-if (!h)
-    {
-    printfd(__FILE__, "users->OpenSearch() error\n");
-    return;
-    }
+assert(h && "USERS::OpenSearch is always correct");
 
 while (users->SearchNext(h, &u) == 0)
     {