X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/460b9539a7c15580e41a71bbc0f47ae776238915..e3426f7b4c12323e5e3ffa3e6b927f714fc369a5:/lib/cache.h

diff --git a/lib/cache.h b/lib/cache.h
index f1aeccd..b2c9ffc 100644
--- a/lib/cache.h
+++ b/lib/cache.h
@@ -17,14 +17,22 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  * USA
  */
+/** @file lib/cache.h
+ * @brief Object caching
+ *
+ * There is a single cache for the whole process.  Objects of different types
+ * are distinguished.  Objects might be thrown out of the cache at any point.
+ */
 
 #ifndef CACHE_H
 #define CACHE_H
 
 /* Defines a cache mapping keys to typed data items */
 
+/** @brief Type of a cache object */
 struct cache_type {
-  int lifetime;                         /* Lifetime of a cache entry */
+  /** @brief Lifetime for objects of this type (seconds) */
+  int lifetime;
 };
 
 void cache_put(const struct cache_type *type,
@@ -41,6 +49,9 @@ void cache_expire(void);
 void cache_clean(const struct cache_type *type);
 /* Clean all elements of a particular type, or all elements if TYPE=0 */
 
+size_t cache_count(void);
+/* Return the size of the cache */
+
 #endif /* CACHE_H */
 
 /*
@@ -51,4 +62,3 @@ fill-column:79
 indent-tabs-mode:nil
 End:
 */
-/* arch-tag:8TQYM58jrfK4bi9YaWTutQ */