Hi Michael,
My 32-bit, GTK+2 version does
// Secure glib
if (!g_thread_supported ()) {
g_thread_init (NULL);
}
at the beginning, and then the thread is spawned via:
on_button1_clicked (GtkButton *button1, MyData *data)
{
GThread *thread;
GError *error = NULL;
thread = g_thread_create ((GThreadFunc) my_function, data, FALSE, &error);
if (! thread) {
g_print ("Error: Unable to create new thread for my_function() in
on_button1_clicked().%s\n", error->message);
exit (EXIT_FAILURE);
}
My 64-bit, GTK+3 versions does not do the g_thread_init() call.
It spawns a new thread via:
int
on_button1_clicked (GtkButton *button1, MyData *data)
{
GThread *thread;
thread = g_thread_new ("my_function", (GThreadFunc) my_function, data);
if (! thread) {
fprintf (stderr, "Error: Unable to create new thread for my_function() in
on_button1_clicked().\n");
exit (EXIT_FAILURE);
}
These threads do nothing with the GUI.
Dave
________________________________
From: Michael Torrie <torr...@gmail.com>
To: gtk-app-devel-list@gnome.org
Sent: Wednesday, November 27, 2013 2:16 PM
Subject: Re: Delay time to spawn new threads?
On 11/27/2013 08:29 AM, David Buchan wrote:
> I have written a program which spawns a new thread when the user
> clicks a button. The new thread does something noticeable immediately
> after starting, so I know when the thread has begun. What I mean is,
> if I run that piece of code that is executed as a new thread, but as
> a stand-alone program, it does it's thing immediately.
>
> However, when I have it run as a new thread when the user clicks a
> button, it takes about 1.5 seconds before it does its thing.
>
>
> I've done this with g_thread_create() and g_thread_new() with
> identical results. Is it normal for there to be a 1.5 sec delay, or
> have I bumbled something?
Did you initialize the thread subsystem before using threads? Did you
use the proper semiphores around GUI calls, or better yet use g_idle_add
to schedule GUI updates in the main thread?
http://www.gtk.org/api/2.6/gdk/gdk-Threads.html
http://blog.borovsak.si/2009/06/multi-threaded-gtk-applications.html
etc
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