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GSettingsBackend: make signal dispatch threadsafe

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This commit fixes up a few race conditions in the GSettingsBackend, mostly with
respect to change notifications occuring at the same time as the last reference
count on a GSettings is dropped.  With GDBus feeding us our incoming signals in
a separate thread, this is something that could easily happen.
This commit is contained in:
Ryan Lortie
2010-05-16 14:17:34 -04:00
parent 4967b6d2ab
commit 61219e2640
4 changed files with 301 additions and 218 deletions
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26
gio/gsettingsbackendinternal.h
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@@ -27,37 +27,37 @@
#include "gsettingsbackend.h"
typedef void (*GSettingsBackendChangedFunc) (GSettingsBackend *backend,
GObject *target,
const gchar *key,
gpointer origin_tag,
gpointer user_data);
gpointer origin_tag);
typedef void (*GSettingsBackendPathChangedFunc) (GSettingsBackend *backend,
GObject *target,
const gchar *path,
gpointer origin_tag,
gpointer user_data);
gpointer origin_tag);
typedef void (*GSettingsBackendKeysChangedFunc) (GSettingsBackend *backend,
GObject *target,
const gchar *prefix,
const gchar * const *names,
gpointer origin_tag,
gpointer user_data);
gpointer origin_tag);
typedef void (*GSettingsBackendWritableChangedFunc) (GSettingsBackend *backend,
const gchar *key,
gpointer user_data);
GObject *target,
const gchar *key);
typedef void (*GSettingsBackendPathWritableChangedFunc) (GSettingsBackend *backend,
const gchar *path,
gpointer user_data);
GObject *target,
const gchar *path);
G_GNUC_INTERNAL
void g_settings_backend_watch (GSettingsBackend *backend,
GObject *target,
GMainContext *context,
GSettingsBackendChangedFunc changed,
GSettingsBackendPathChangedFunc path_changed,
GSettingsBackendKeysChangedFunc keys_changed,
GSettingsBackendWritableChangedFunc writable_changed,
GSettingsBackendPathWritableChangedFunc path_writable_changed,
gpointer user_data);
GSettingsBackendPathWritableChangedFunc path_writable_changed);
G_GNUC_INTERNAL
void g_settings_backend_unwatch (GSettingsBackend *backend,
gpointer user_data);
GObject *target);
G_GNUC_INTERNAL
gboolean g_settings_backend_supports_context (const gchar *context);