Re: Memory Usage

[Andre Messerschmidt <a_messerschmidt yahoo com>]

Sure. Would be great if it is just a simple misunderstanding on how to use GTK.

----- snip -------------------------------------------------------
#include <stdio.h>
#include <signal.h>             
#include <gtk/gtk.h>

GtkWidget *window, *window1;
GtkWidget *fixed;
GtkWidget *frame1;
GtkWidget *frame2;
GtkWidget *frame3;
struct sigaction xact;
  
void GtkCreateWindow()
{ 
  window1 = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_widget_set_size_request (window, 100, 100);
  gtk_window_set_resizable(GTK_WINDOW(window1), 1);
  gtk_window_set_decorated(GTK_WINDOW(window1), 1);
  gtk_window_set_gravity(GTK_WINDOW(window1), GDK_GRAVITY_CENTER);
  gtk_window_move(GTK_WINDOW(window1),200,10);
  gtk_widget_show (window1);

}


void outer_signal_handler(int iSigno, siginfo_t *pxsigInfo,
 void *context)
{
  static int i=0;
  
  printf("---- Signal handler Start -----------------------------------------------------\n");
  
  if ((i % 2) == 0)
  {
    printf("i=%d creating\n",i);    
    GtkCreateWindow();
  }
  else
  {
    printf("i=%d destroying\n",i);    
    gtk_widget_destroy(GTK_WIDGET(window1));
  }
  i++;
  printf("---- Signal handler End -------------------------------------------------------\n");

}

int main( int argc,char *argv[] )
{

  gtk_init (&argc, &argv);
  xact.sa_sigaction = outer_signal_handler;
  sigemptyset (&xact.sa_mask);
  xact.sa_flags = SA_NOCLDSTOP | SA_SIGINFO;
  if (sigaction(SIGUSR2, &xact, NULL) < 0)
  {
    fprintf(stderr,
 "sigaction failed\n");
  }
  
  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_gravity(GTK_WINDOW(window), GDK_GRAVITY_CENTER);
  gtk_window_move(GTK_WINDOW(window), 33,3);
  gtk_container_set_border_width (GTK_CONTAINER (window), 0);
  gtk_widget_set_size_request (window, 320, 190);
  
  fixed = gtk_fixed_new ();
  gtk_container_add (GTK_CONTAINER (window), fixed);
  gtk_widget_show (fixed);
  
  frame1 = gtk_frame_new (NULL);
  gtk_fixed_put (GTK_FIXED (fixed), frame1, 0, 0);
  gtk_widget_set_size_request (frame1, 160,40);
  gtk_frame_set_shadow_type (GTK_FRAME (frame1), GTK_SHADOW_OUT);
  gtk_widget_show (frame1);

  frame2 = gtk_frame_new (NULL);
  gtk_fixed_put (GTK_FIXED (fixed), frame2, 0, 40);
  gtk_widget_set_size_request (frame2, 160,150);
  gtk_frame_set_shadow_type (GTK_FRAME
 (frame2), GTK_SHADOW_OUT);
  gtk_widget_show (frame2);

  frame3 = gtk_frame_new (NULL);
  gtk_fixed_put (GTK_FIXED (fixed), frame3, 0, 190);
  gtk_widget_set_size_request (frame3, 320,40);
  gtk_frame_set_shadow_type (GTK_FRAME (frame3), GTK_SHADOW_OUT);
  gtk_widget_show (frame3);
  
  gtk_widget_show (window);

  gtk_main();
  
  return 0;
}

----- snap -------------------------------------------------------
 
This program should create a window and then after receiving a USR2 signal display or destroy another window. Here I can see that if I do this long enough, my memory keeps decreasing until only 1MB is left (from initially 128MB)

Hope it helps.

best regards
Andre


Ivan Baldo <ibaldo adinet com uy> wrote:
>      Can you post the source code of your test application?
>     GTK doesn't seem to leak memory on i386, it shouldn't on MIPS...
>     Thank you.

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