I'm writting my first GTK based program, and it basically works except for what appears to be a very slow memory leak and the occasional hang.
Its the hang I'm most concerned with.
My app creates a socket listener...
The parent creates a child process, when the child powers up, it connects to that listener. The parent then exchanges stuff with the child through that socket, and when the child dies, I close the socket.
The the whole sequence repeats again...
In sorta psuedo code, the listener creation is the usual:
listener_fd = socket(); bind(listener_fd); listen(listener_fd);
followed by:
listener_channel = g_io_channel_unix_new(listener_fd);
listener_id = g_io_add_watch(listener_channel), G_IO_IN, wait_for_child_connection, "");
wait_for_child_connection(GIOChannel *source, ...) {
child_fd = accept(g_io_channel_unix_get_fd(source), ...);
child_id = g_io_add_watch(child_channel, GIO_IN, process_message "");
return TRUE;
}Then when the child dies and I catch the SIGCHLD, I do the following:
if (child_id != 0) { gsource_remove(child_id); child_id = 0; }
if (child_channel != NULL) {
gio_channel_shutdown(child_channel, TRUE, &error);
g_io_channel_unref(child_channel);
child_channel = NULL;
}
if (child_fd != 0) { close)child_fd); }============================
What I find is that at random, and fairly rarely, the app hangs in the middle of the g_source_remove() funcation, cause it never returns.
- Is this not the correct way to handle it?
- Or am I doing something wrong?
- Or is related to the fact that the other end of the socket has already died?
- And could this code be somehow related to the minor memory leak I still have?
Any help would be appreciated.
TIA Fulko
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