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compositor/plugin-manager: Split start() from new()

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In order to support dynamic imports, gjs added an implicit mainloop
that can drive the main context independently from other mainloops
like the one from GApplication or MetaContext.

That means that sources can now get dispatched to the main context
from the moment the plugin is started, resulting in a crash as the
association between compositor and plugin manager doesn't exist until
meta_plugin_manager_new() returns.

Make sure this doesn't happen by only starting the plugin after
meta_plugin_manager_new() has returned.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2242>
This commit is contained in:
Florian Müllner 2022-01-18 19:25:57 +01:00
parent 3b400f9a5b
commit 5b720a157c
3 changed files with 13 additions and 6 deletions
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1
src/compositor/compositor.c
View File

@ -548,6 +548,7 @@ meta_compositor_do_manage (MetaCompositor *compositor,
return FALSE;
priv->plugin_mgr = meta_plugin_manager_new (compositor);
meta_plugin_manager_start (priv->plugin_mgr);
return TRUE;
}

16
src/compositor/meta-plugin-manager.c
View File

@ -97,7 +97,6 @@ MetaPluginManager *
meta_plugin_manager_new (MetaCompositor *compositor)
{
MetaPluginManager *plugin_mgr;
MetaPluginClass *klass;
MetaPlugin *plugin;
MetaMonitorManager *monitors;
@ -107,11 +106,6 @@ meta_plugin_manager_new (MetaCompositor *compositor)
_meta_plugin_set_compositor (plugin, compositor);
klass = META_PLUGIN_GET_CLASS (plugin);
if (klass->start)
klass->start (plugin);
monitors = meta_monitor_manager_get ();
g_signal_connect (monitors, "confirm-display-change",
G_CALLBACK (on_confirm_display_change), plugin_mgr);
@ -119,6 +113,16 @@ meta_plugin_manager_new (MetaCompositor *compositor)
return plugin_mgr;
}
void
meta_plugin_manager_start (MetaPluginManager *plugin_mgr)
{
MetaPlugin *plugin = plugin_mgr->plugin;
MetaPluginClass *klass = META_PLUGIN_GET_CLASS (plugin);
if (klass->start)
klass->start (plugin);
}
static void
meta_plugin_manager_kill_window_effects (MetaPluginManager *plugin_mgr,
MetaWindowActor *actor)

2
src/compositor/meta-plugin-manager.h
View File

@ -45,6 +45,8 @@ typedef struct MetaPluginManager MetaPluginManager;
MetaPluginManager * meta_plugin_manager_new (MetaCompositor *compositor);
void meta_plugin_manager_start (MetaPluginManager *plugin_mgr);
META_EXPORT_TEST
void meta_plugin_manager_load (const gchar *plugin_name);