g_idle_add() clarification

Ian Chapman <ichapman@xxxxxxxxxxxx> · Tue, 20 Jan 2015 15:23:00 -0500



    Hi all,
    Sorry to bother but
      I'm lost with the workings of 
    guint g_idle_add ()
    My code is as
follows
    extern "C"
    
    void
      on_StartScan_activate() //from gtk menu item
    { printf("Start
      Scan Activated. \n");
    
     scan_on_fg =1;
    
     Scanning_lvl =
      g_idle_add((GSourceFunc) Scanning(), (gpointer) 0);
    
     printf("Exiting
      StartScan.\n");  //main.cpp, Line 129

    
     return; }
    I get to Scanning()
      okay but I don't exit on_StartScan_activeat() until I exit
      Scanning()
      (not what I expected).
    Worse still when I
      step through Scanning as I exit I get
    (gdb) next
    
    
    (main:24011):
      GLib-CRITICAL **: g_idle_add_full: assertion `function != NULL'
      failed
    
    on_StartScan_activate
()
      at main.cpp:129
    
    (gdb) next
    
    Exiting StartScan.
    

    guint
      Scanning(void)
    
    {
    while(1 ==
      scan_on_fg)
     { //Bean counting
      with rest of GUI in control, I hoped. }
     return(FALSE);
      //Remove this thread.
    }
    

     Regards Ian.
    
    
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