isa/mutter
1
0
Fork 0
mirror of https://github.com/brl/mutter.git synced 2024-11-26 18:11:05 -05:00
Code Issues Packages Projects Releases Wiki Activity

interactive/threads: Clean up

Browse Source 
Add some comments explaining why we use idle handlers to update the UI,
and update to the newest API in GLib master.
This commit is contained in:
Emmanuele Bassi 2011-10-13 10:38:36 +01:00
parent e389240b23
commit c58baf42ca
1 changed files with 32 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
tests/interactive/test-threads.c
View File

@ -5,6 +5,7 @@
#undef CLUTTER_DISABLE_DEPRECATED
#include <clutter/clutter.h>
/* our thread-specific data */
typedef struct
{
ClutterActor *stage;
@ -12,8 +13,6 @@ typedef struct
ClutterActor *progress;
ClutterTimeline *timeline;
volatile gboolean cancelled;
} TestThreadData;
static TestThreadData *
@ -57,7 +56,22 @@ test_thread_done_idle (gpointer user_data)
return FALSE;
}
static GPrivate test_thread_data = G_PRIVATE_INIT (test_thread_data_free);
static void
test_thread_data_done (gpointer _data)
{
TestThreadData *data = _data;
/* since the TestThreadData structure references Clutter data structures
* we need to free it from within the same thread that called clutter_main()
* which means using an idle handler in the main loop.
*
* clutter_threads_add_idle() is guaranteed to run the callback passed to
* to it under the Big Clutter Lock.
*/
clutter_threads_add_idle (test_thread_done_idle, data);
}
static GPrivate test_thread_data = G_PRIVATE_INIT (test_thread_data_done);
typedef struct
{
@ -73,7 +87,6 @@ update_label_idle (gpointer data)
gchar *text;
text = g_strdup_printf ("Count to %d", update->count);
clutter_text_set_text (CLUTTER_TEXT (update->thread_data->label), text);
clutter_actor_set_width (update->thread_data->label, -1);
@ -99,8 +112,6 @@ do_something_very_slow (void)
gint i;
data = g_private_get (&test_thread_data);
if (data->cancelled)
return;
for (i = 0; i < 100; i++)
{
@ -108,13 +119,18 @@ do_something_very_slow (void)
msecs = 1 + (int) (100.0 * rand () / ((RAND_MAX + 1.0) / 3));
/* sleep for a while */
/* sleep for a while, to emulate some work being done */
g_usleep (msecs * 1000);
if ((i % 10) == 0)
{
TestUpdate *update;
/* update the UI from within the main loop, making sure that the
* Big Clutter Lock is held; only one thread at a time can call
* Clutter API, and it's better to do this from the same thread
* that called clutter_init()/clutter_main().
*/
update = g_new (TestUpdate, 1);
update->count = i;
update->thread_data = data;
@ -133,12 +149,9 @@ test_thread_func (gpointer user_data)
g_private_set (&test_thread_data, data);
/* this function will block */
do_something_very_slow ();
clutter_threads_add_idle_full (G_PRIORITY_DEFAULT + 30,
test_thread_done_idle,
data, NULL);
return NULL;
}
@ -167,7 +180,8 @@ on_key_press_event (ClutterStage *stage,
data->progress = g_object_ref (progress_rect);
data->timeline = g_object_ref (timeline);
g_thread_new ("counter", test_thread_func, data, FALSE, NULL);
/* start the thread that updates the counter and the progress bar */
g_thread_new ("counter", test_thread_func, data);
return TRUE;
@ -261,3 +275,9 @@ test_threads_main (int argc, char *argv[])
return EXIT_SUCCESS;
}
const char *
test_threads_describe (void)
{
return "Multi-threading programming with Clutter";
}