[gnome-builder] task-cache: add evict_all() helper

[Christian Hergert <chergert src gnome org>]

commit 2be02bf0b399a94c02cf1c1d18dc5687a708d1e0
Author: Christian Hergert <chergert redhat com>
Date:   Sun Dec 4 15:34:40 2016 -0800

    task-cache: add evict_all() helper
    
    This is a simple evict all implementation. We could probably do a better
    implementation, but this will work for now.

 contrib/egg/egg-task-cache.c |   25 +++++++++++++++++++++++++
 contrib/egg/egg-task-cache.h |    1 +
 2 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/contrib/egg/egg-task-cache.c b/contrib/egg/egg-task-cache.c
index c932a53..3d466eb 100644
--- a/contrib/egg/egg-task-cache.c
+++ b/contrib/egg/egg-task-cache.c
@@ -267,6 +267,31 @@ egg_task_cache_evict (EggTaskCache  *self,
   return egg_task_cache_evict_full (self, key, TRUE);
 }
 
+void
+egg_task_cache_evict_all (EggTaskCache *self)
+{
+  guint size;
+
+  g_return_if_fail (EGG_IS_TASK_CACHE (self));
+
+  size = g_hash_table_size (self->cache);
+
+  while (self->evict_heap->len > 0)
+    {
+      CacheItem *item;
+
+      /* The cache item is owned by the hashtable, so safe to "leak" here */
+      egg_heap_extract_index (self->evict_heap, self->evict_heap->len - 1, &item);
+    }
+
+  g_hash_table_remove_all (self->cache);
+
+  EGG_COUNTER_SUB (cached, size);
+
+  if (self->evict_source != NULL)
+    evict_source_rearm (self->evict_source);
+}
+
 /**
  * egg_task_cache_peek:
  * @self: An #EggTaskCache
diff --git a/contrib/egg/egg-task-cache.h b/contrib/egg/egg-task-cache.h
index fcf5e47..1935ed4 100644
--- a/contrib/egg/egg-task-cache.h
+++ b/contrib/egg/egg-task-cache.h
@@ -72,6 +72,7 @@ gpointer      egg_task_cache_get_finish (EggTaskCache          *self,
                                          GError               **error);
 gboolean      egg_task_cache_evict      (EggTaskCache          *self,
                                          gconstpointer          key);
+void          egg_task_cache_evict_all  (EggTaskCache          *self);
 gpointer      egg_task_cache_peek       (EggTaskCache          *self,
                                          gconstpointer          key);
 GPtrArray    *egg_task_cache_get_values (EggTaskCache          *self);