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event: Protect event cache with a lock

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We'll be creating events from multiple threads soon,
so make sure the event cache is protected enough.
This commit is contained in:
Georges Basile Stavracas Neto
2020-04-01 21:06:50 -03:00
parent ae2a6b9d21
commit f182813e49
1 changed files with 22 additions and 1 deletions
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src/core/gcal-event.c
+22 -1
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@@ -139,6 +139,9 @@ static GParamSpec* properties[N_PROPS] = { NULL, };
* GcalEvent cache
*/
G_LOCK_DEFINE (main_lock);
G_LOCK_DEFINE (event_cache_lock);
static GHashTable *event_cache = NULL;
G_DEFINE_CONSTRUCTOR (init_event_cache_map);
@@ -272,6 +275,8 @@ gcal_event_update_uid_internal (GcalEvent *self)
should_update_cache = self->uid != NULL;
G_LOCK (event_cache_lock);
if (should_update_cache)
{
g_debug ("Removing '%s' (%p) from cache", self->uid, self);
@@ -299,6 +304,8 @@ gcal_event_update_uid_internal (GcalEvent *self)
g_hash_table_insert (event_cache, self->uid, self);
}
G_UNLOCK (event_cache_lock);
e_cal_component_id_free (id);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_UID]);
}
@@ -495,7 +502,9 @@ gcal_event_finalize (GObject *object)
g_debug ("Removing '%s' (%p) from cache", self->uid, self);
G_LOCK (event_cache_lock);
g_hash_table_remove (event_cache, self->uid);
G_UNLOCK (event_cache_lock);
g_clear_pointer (&self->dt_start, g_date_time_unref);
g_clear_pointer (&self->dt_end, g_date_time_unref);
@@ -820,10 +829,17 @@ gcal_event_new (GcalCalendar *calendar,
{
GcalEvent *event;
g_autofree gchar *uuid;
gboolean event_cached;
G_LOCK (main_lock);
uuid = get_uuid_from_component (gcal_calendar_get_source (calendar), component);
if (g_hash_table_contains (event_cache, uuid))
G_LOCK (event_cache_lock);
event_cached = g_hash_table_contains (event_cache, uuid);
G_UNLOCK (event_cache_lock);
if (event_cached)
{
g_debug ("Using cached value for %s", uuid);
@@ -843,10 +859,15 @@ gcal_event_new (GcalCalendar *calendar,
if (event)
{
g_debug ("Adding %s to the cache", event->uid);
G_LOCK (event_cache_lock);
g_hash_table_insert (event_cache, event->uid, event);
G_UNLOCK (event_cache_lock);
}
}
G_UNLOCK (main_lock);
return event;
}