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context: Add explicit state tracking

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This will help finding out when things happen in the wrong order.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1861>
This commit is contained in:
Jonas Ådahl 2021-03-03 23:02:50 +01:00
parent c1beb204c2
commit 2deb751fd9
1 changed files with 58 additions and 4 deletions
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58
src/core/meta-context.c
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@ -46,6 +46,16 @@ enum
static GParamSpec *obj_props[N_PROPS];
typedef enum _MetaContextState
{
META_CONTEXT_STATE_INIT,
META_CONTEXT_STATE_CONFIGURED,
META_CONTEXT_STATE_SETUP,
META_CONTEXT_STATE_STARTED,
META_CONTEXT_STATE_RUNNING,
META_CONTEXT_STATE_TERMINATED,
} MetaContextState;
typedef struct _MetaContextPrivate
{
char *name;
@ -53,6 +63,8 @@ typedef struct _MetaContextPrivate
GType plugin_gtype;
char *gnome_wm_keybindings;
MetaContextState state;
GOptionContext *option_context;
MetaBackend *backend;
@ -74,6 +86,8 @@ meta_context_add_option_entries (MetaContext *context,
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_warn_if_fail (priv->state == META_CONTEXT_STATE_INIT);
g_option_context_add_main_entries (priv->option_context,
entries,
translation_domain);
@ -85,6 +99,7 @@ meta_context_add_option_group (MetaContext *context,
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_warn_if_fail (priv->state == META_CONTEXT_STATE_INIT);
g_return_if_fail (priv->option_context);
g_option_context_add_group (priv->option_context, group);
@ -96,6 +111,7 @@ meta_context_set_plugin_gtype (MetaContext *context,
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_return_if_fail (priv->state <= META_CONTEXT_STATE_CONFIGURED);
g_return_if_fail (!priv->plugin_name);
priv->plugin_gtype = plugin_gtype;
@ -107,6 +123,7 @@ meta_context_set_plugin_name (MetaContext *context,
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_return_if_fail (priv->state <= META_CONTEXT_STATE_CONFIGURED);
g_return_if_fail (priv->plugin_gtype == G_TYPE_NONE);
priv->plugin_name = g_strdup (plugin_name);
@ -118,6 +135,8 @@ meta_context_set_gnome_wm_keybindings (MetaContext *context,
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_return_if_fail (priv->state <= META_CONTEXT_STATE_CONFIGURED);
g_clear_pointer (&priv->gnome_wm_keybindings, g_free);
priv->gnome_wm_keybindings = g_strdup (wm_keybindings);
}
@ -133,6 +152,11 @@ meta_context_get_gnome_wm_keybindings (MetaContext *context)
void
meta_context_notify_ready (MetaContext *context)
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_return_if_fail (priv->state == META_CONTEXT_STATE_STARTED ||
priv->state == META_CONTEXT_STATE_RUNNING);
META_CONTEXT_GET_CLASS (context)->notify_ready (context);
}
@ -214,10 +238,16 @@ meta_context_configure (MetaContext *context,
char ***argv,
GError **error)
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
MetaCompositorType compositor_type;
g_warn_if_fail (priv->state == META_CONTEXT_STATE_INIT);
if (!META_CONTEXT_GET_CLASS (context)->configure (context, argc, argv, error))
{
priv->state = META_CONTEXT_STATE_TERMINATED;
return FALSE;
}
compositor_type = meta_context_get_compositor_type (context);
switch (compositor_type)
@ -230,6 +260,8 @@ meta_context_configure (MetaContext *context,
break;
}
priv->state = META_CONTEXT_STATE_CONFIGURED;
return TRUE;
}
@ -320,8 +352,11 @@ meta_context_setup (MetaContext *context,
MetaContextPrivate *priv = meta_context_get_instance_private (context);
MetaCompositorType compositor_type;
g_warn_if_fail (priv->state == META_CONTEXT_STATE_CONFIGURED);
if (!priv->plugin_name && priv->plugin_gtype == G_TYPE_NONE)
{
priv->state = META_CONTEXT_STATE_TERMINATED;
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"No compositor plugin set");
return FALSE;
@ -344,7 +379,14 @@ meta_context_setup (MetaContext *context,
init_introspection (context);
return META_CONTEXT_GET_CLASS (context)->setup (context, error);
if (!META_CONTEXT_GET_CLASS (context)->setup (context, error))
{
priv->state = META_CONTEXT_STATE_TERMINATED;
return FALSE;
}
priv->state = META_CONTEXT_STATE_SETUP;
return TRUE;
}
gboolean
@ -353,6 +395,8 @@ meta_context_start (MetaContext *context,
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_warn_if_fail (priv->state == META_CONTEXT_STATE_SETUP);
meta_prefs_init ();
#ifdef HAVE_WAYLAND
@ -363,10 +407,15 @@ meta_context_start (MetaContext *context,
priv->display = meta_display_new (context, error);
if (!priv->display)
{
priv->state = META_CONTEXT_STATE_TERMINATED;
return FALSE;
}
priv->main_loop = g_main_loop_new (NULL, FALSE);
priv->state = META_CONTEXT_STATE_STARTED;
return TRUE;
}
@ -376,14 +425,18 @@ meta_context_run_main_loop (MetaContext *context,
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_warn_if_fail (priv->state == META_CONTEXT_STATE_STARTED);
if (!priv->main_loop)
{
priv->state = META_CONTEXT_STATE_TERMINATED;
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Tried to run main loop without having started");
return FALSE;
}
priv->state = META_CONTEXT_STATE_RUNNING;
g_main_loop_run (priv->main_loop);
priv->state = META_CONTEXT_STATE_TERMINATED;
g_clear_pointer (&priv->main_loop, g_main_loop_unref);
if (priv->termination_error)
@ -400,7 +453,8 @@ meta_context_terminate (MetaContext *context)
{
MetaContextPrivate *priv = meta_context_get_instance_private (context);
g_return_if_fail (g_main_loop_is_running (priv->main_loop));
g_warn_if_fail (priv->state == META_CONTEXT_STATE_RUNNING);
g_warn_if_fail (g_main_loop_is_running (priv->main_loop));
g_main_loop_quit (priv->main_loop);
}