code crash after 25-30 min only!

[Eric Wajnberg <eric wajnberg sophia inra fr>]

Hi there,

I just remain unable to debug this code. Actually, it runs very well but 
crashes after 30-35 minutes only.

This is a "stopwatch-type" app. However, I actually need to refresh 
things on a continuous basis. Hence, a g_timeout_add_seconds() is 
**not** what I need. The idea of a stopwatch is just a way for me to 
learn and practice.

The code that I have is more or less this one:

#include <stdlib.h>
#include <gtk/gtk.h>
#include <strings.h>

int flag_depart=1;
char format_sortie[100];
typedef struct
{
    GtkWidget *widget1;
    GTimer *widget2;
} MyStruct; /* a struct to pass several arguments to an callback */

int main(int argc, char **argv)
{
    /* declaration of widgets */
    [...]
    GtkWidget *pLabel; /* a label */
    GTimer *timer; /* a timer */
    gchar* sUtf8;  /* to format a char string */
    [...]
    MyStruct struct_tempo; /* a struct to pass several arguments to an 
callback */
    [...]
    gboolean OnExpose(GtkWidget *pWidget, GdkEvent *event, gpointer 
pData); /* function callback expose-event */
    [...]
    /* creation of the label */
    pLabel=gtk_label_new(NULL);
    (void)sprintf(format_sortie, "<span font_desc=\"25\"><b>00 : 00 : 
00</b></span>");
    sUtf8 = g_locale_to_utf8(format_sortie, -1, NULL, NULL, NULL);
    gtk_label_set_markup(GTK_LABEL(pLabel), sUtf8);
    g_free(sUtf8);
    /* we put the label in the struct */
    struct_tempo.widget1=pLabel;

    /* creation of the timer */
    timer=g_timer_new();
    /* we put the timer in the struct */
    struct_tempo.widget2=timer;

    /* Connexion of signals */
    g_signal_connect(G_OBJECT(pWindow), "expose-event", 
G_CALLBACK(OnExpose), (gpointer )&struct_tempo);

[...]

    return EXIT_SUCCESS;
}
gboolean OnExpose(GtkWidget *pWidget, GdkEvent *event, gpointer pData)
{
    /* updating the label */
    char tempo[1000],h[3],m[3],s[3];
    int heures=0, minutes=0;
    GTimeSpan secondes=0;
    gchar* sUtf8;
    MyStruct *struct_tempo2;
    struct_tempo2= (MyStruct *)pData;
    float convertir(GTimeSpan *secondes, int *minutes, int *heures);
    if (flag_depart)
    {
secondes=(GTimeSpan)g_timer_elapsed(struct_tempo2->widget2, NULL);
        convertir(&secondes, &minutes, &heures);
        if (secondes>9)
            (void)sprintf(s, "%d",secondes);
        else
            (void)sprintf(s, "0%d",secondes);
        if (minutes>9)
            (void)sprintf(m, "%d",minutes);
        else
            (void)sprintf(m, "0%d",minutes);
        if (heures>9)
            (void)sprintf(h, "%d",heures);
        else
            (void)sprintf(h, "0%d",heures);
        (void)sprintf(tempo, "<span font_desc=\"25\"><b>%s : %s : 
%s</b></span>",h, m, s);
        sUtf8 = g_locale_to_utf8(tempo, -1, NULL, NULL, NULL);
        gtk_label_set_markup(GTK_LABEL(struct_tempo2->widget1), tempo);
    }
    g_free(sUtf8);
    return FALSE;
}
float convertir(GTimeSpan *secondes, int *minutes, int * heures)
{
    /* convert seconds into hours, minuts and seconds */
    while (*secondes>59)
        {
            *minutes=*minutes+1;
            *secondes=*secondes-60;
        }
        while (*minutes>59)
        {
            *heures=*heures+1;
            *minutes=*minutes-60;
        }
}

This codes works well but crashes avec about 30-35 minutes. I code in 
Windows 7 with CodeBlock. I've tried to use a debugger, but I get a:

Segmentation fault.
In ntdll!LdrWx86FormatVirtualImage () (C:\Windows\system32\ntdll.dll)

as soon as the gtk_main() is launched. I have really no idea about how I 
can solve this now.

Any help will be welcomed!!

Thanks in advance for this.

Cheers, Eric.


--
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Eric Wajnberg
    Associated Professor at the
    University of Montreal (Quebec, Canada)
    I.N.R.A.
    400 Route des Chappes, BP 167,
    06903 Sophia Antipolis Cedex, France
    Tel: (33-0) 4.92.38.64.47
    Fax: (33-0) 4.92.38.65.57
    e-mail: wajnberg sophia inra fr
    Web page: http://www.sophia.inra.fr/perso/wajnberg/

    Editor-in-Chief of BioControl, Published by Springer.

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~