A question regarding gtk_clipboard_request_text

["Wang, Yong Y" <yong y wang intel com>]

Hi,

I have a question regarding the function
void        gtk_clipboard_request_text      (GtkClipboard *clipboard,
 
GtkClipboardTextReceivedFunc callback,
                                             gpointer user_data);

I wonder how long is the lifetime of clipboard data we get via this
function.
Is it the same as the lifecycle of function call to
GtkClipboardTextReceivedFunc?

I wrote two test cases as below:

====== test case 1 ======

#include <gtk/gtk.h>

#define TEXT    "Hello"

static gchar *global_text;

void global_text_receive (GtkClipboard *clipboard, const gchar *text,
gpointer data)
{
        global_text = (gchar *)text;
}

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

        gtk_init (&argc, &argv);

        clipboard = gtk_clipboard_get (GDK_NONE);

        gtk_clipboard_set_text (clipboard, TEXT, strlen (TEXT));
        gtk_clipboard_request_text (clipboard, global_text_receive,
NULL);

        if (strcmp (TEXT, global_text))
                g_printf ("Texts not equal, TEXT=%s, clipdata=%s\n",
TEXT, global_text);
        else
                g_printf ("Texts equal\n");

        return 0;
}

Outputs of running the compiled code for 4 times are as the following
$ ./a.out
Texts not equal, TEXT=Hello, clipdata= S\uffff       o
$ ./a.out
Texts not equal, TEXT=Hello, clipdata= so
$ ./a.out
Texts not equal, TEXT=Hello, clipdata= \uffffo
$ ./a.out
Texts not equal, TEXT=Hello, clipdata= 3\uffff       o

====== test case 2 ======

#include <gtk/gtk.h>

#define TEXT    "Hello"

void global_text_receive (GtkClipboard *clipboard, const gchar *text,
gpointer data)
{
        if (strcmp (TEXT, (const gchar *)data))
                g_printf ("Texts not equal, TEXT=%s, clipdata=%s\n",
TEXT, (const gchar *)data);
        else
                g_printf ("Texts equal\n");
}

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

        gtk_init (&argc, &argv);

        clipboard = gtk_clipboard_get (GDK_NONE);

        gtk_clipboard_set_text (clipboard, TEXT, strlen (TEXT));
        gtk_clipboard_request_text (clipboard, global_text_receive,
TEXT);

        return 0;
}

Output is as below
$ ./a.out
Texts equal

Is my understanding correct?

Thanks
Yong