L4D2 Smart Server Restarter

#include <sourcemod>

#define MONITORING_INTERVAL     2400.0  //server restarts every 40 minutes
#define SHUTDOWN_DELAY          6.0 // When server's empty, restart after this many seconds

Handle g_hTimer_PendingShutdown;
Handle g_hTimer_EnableServerImmunity;
bool g_bMapChange;

public Plugin:myinfo =
{
    name = "L4D2 Smart Server Restarter",
    author = "Visor, moified by drixevel (Keith Warren)",
    description = "Restarts the server after the game is finished",
    version = "1.3.3.7"
};

public void OnPluginStart()
{
    CreateTimer(MONITORING_INTERVAL, CheckForPlayers, _, TIMER_REPEAT);
}

public Action CheckForPlayers(Handle timer)
{
    ExecuteShutdownTimer();
}

public void OnClientDisconnect_Post(int client)
{
    ExecuteShutdownTimer();
}

void ExecuteShutdownTimer()
{
    // Check if there are no players on the servers
    if (GetRealClientCount() == 0 && g_hTimer_PendingShutdown == null)
    {
        // No players; let's wait and see if anyone joins within the specified interval
        g_hTimer_PendingShutdown = CreateTimer(SHUTDOWN_DELAY, ShutdownTimer);
    }
}

public Action ShutdownTimer(Handle timer)
{
    // No one has joined within the allocated time? Shutdown the server
    if (GetRealClientCount() == 0 && g_hTimer_EnableServerImmunity == null)
    {
        ServerCommand("quit");
    }
    else // Someone did join. Go back to monitoring...
    {
        g_hTimer_PendingShutdown = null;
        return Plugin_Stop;
    }
}

int GetRealClientCount()
{
    int count;
    for (int i = 1; i <= MaxClients; i++)
    {
        if (IsClientInGame(i) && !IsFakeClient(i))
        {
            count++;
        }
    }

    return count;
}

/* ---------- boolean values----------*/

public void OnMapEnd()
{
    KillTimerSafe(g_hTimer_EnableServerImmunity);
    g_hTimer_EnableServerImmunity = CreateTimer(120.0, DisableServerShutdownImmunity);
    g_bMapChange = true;
}

public void OnMapStart()
{
    g_bMapChange = false;
}

public Action DisableServerShutdownImmunity(Handle timer)
{
    g_hTimer_EnableServerImmunity = null;
}

public void OnClientPutInServer(int client)
{
    if (!g_bMapChange)
    {
        KillTimerSafe(g_hTimer_EnableServerImmunity);
    }
}

void KillTimerSafe(Handle& timer)
{
    if (timer != null)
    {
        KillTimer(timer);
        timer = null;
    }
}