Clean up caches on exit

svn path=/trunk/netsurf/; revision=10494

content/hlcache.c

@@ -87,6 +87,67 @@ static void hlcache_content_callback(struct content *c,
  * Public API								      *
  ******************************************************************************/
 
+/* See hlcache.h for documentation */
+void hlcache_finalise(void)
+{
+	uint32_t num_contents, prev_contents;
+	hlcache_entry *entry;
+	hlcache_retrieval_ctx *ctx, *next;
+
+	/* Obtain initial count of contents remaining */
+	for (num_contents = 0, entry = hlcache_content_list; 
+			entry != NULL; entry = entry->next) {
+		num_contents++;
+	}
+
+	/* Drain cache */
+	do {
+		prev_contents = num_contents;
+
+		hlcache_clean();
+
+		for (num_contents = 0, entry = hlcache_content_list; 
+				entry != NULL; entry = entry->next) {
+			num_contents++;
+		}
+	} while (num_contents > 0 && num_contents != prev_contents);
+
+	LOG(("%d contents remaining:", num_contents));
+	for (entry = hlcache_content_list; entry != NULL; entry = entry->next) {
+		hlcache_handle entry_handle = { entry, NULL, NULL };
+
+		if (entry->content != NULL) {
+			LOG(("  %p : %s", entry, 
+					content_get_url(&entry_handle)));
+		} else {
+			LOG(("  %p", entry));
+		}
+	}
+
+	/* Clean up retrieval contexts */
+	if (hlcache_retrieval_ctx_ring != NULL) {
+		do {
+			ctx = hlcache_retrieval_ctx_ring;
+			next = ctx->r_next;
+
+			if (ctx->llcache != NULL)
+				llcache_handle_release(ctx->llcache);
+
+			if (ctx->handle != NULL)
+				free(ctx->handle);
+
+			if (ctx->child.charset != NULL)
+				free((char *) ctx->child.charset);
+
+			free(ctx);
+
+			ctx = next;
+		} while (ctx != hlcache_retrieval_ctx_ring);
+
+		hlcache_retrieval_ctx_ring = NULL;
+	}
+}
+
 /* See hlcache.h for documentation */
 nserror hlcache_poll(void)
 {
@@ -304,11 +365,11 @@ void hlcache_clean(void)
 		if (content_count_users(entry->content) != 0)
 			continue;
 
-		/** \todo This is over-zealous: all unused contents will be 
+		/** \todo This is over-zealous: all unused contents 
-		 * immediately destroyed. Ideally, we want to purge all 
+		 * will be immediately destroyed. Ideally, we want to 
-		 * unused contents that are using stale source data, and 
+		 * purge all unused contents that are using stale 
-		 * enough fresh contents such that the cache fits in the 
+		 * source data, and enough fresh contents such that 
-		 * configured cache size limit.
+		 * the cache fits in the configured cache size limit.
 		 */
 
 		/* Remove entry from cache */

content/hlcache.h

@@ -63,6 +63,11 @@ enum hlcache_retrieve_flag {
 	HLCACHE_RETRIEVE_MAY_DOWNLOAD = (1 << 31)
 };
 
+/**
+ * Finalise the high-level cache, destroying any remaining contents
+ */
+void hlcache_finalise(void);
+
 /**
  * Drive the low-level cache poll loop, and attempt to clean the cache.
  * No guarantee is made about what, if any, cache cleaning will occur.

content/llcache.c

@@ -224,6 +224,48 @@ nserror llcache_initialise(llcache_query_callback cb, void *pw)
 	return NSERROR_OK;
 }
 
+/* See llcache.h for documentation */
+void llcache_finalise(void)
+{
+	llcache_object *object, *next;
+
+	/* Clean uncached objects */
+	for (object = llcache_uncached_objects; object != NULL; object = next) {
+		llcache_object_user *user, *next_user;
+
+		next = object->next;
+
+		for (user = object->users; user != NULL; user = next_user) {
+			next_user = user->next;
+
+			free(user);
+		}
+
+		/* Fetch system has already been destroyed */
+		object->fetch.fetch = NULL;
+
+		llcache_object_destroy(object);
+	}
+
+	/* Clean cached objects */
+	for (object = llcache_cached_objects; object != NULL; object = next) {
+		llcache_object_user *user, *next_user;
+
+		next = object->next;
+
+		for (user = object->users; user != NULL; user = next_user) {
+			next_user = user->next;
+
+			free(user);
+		}
+
+		/* Fetch system has already been destroyed */
+		object->fetch.fetch = NULL;		
+
+		llcache_object_destroy(object);
+	}
+}
+
 /* See llcache.h for documentation */
 nserror llcache_poll(void)
 {

content/llcache.h

@@ -160,6 +160,11 @@ typedef nserror (*llcache_query_callback)(const llcache_query *query, void *pw,
  */
 nserror llcache_initialise(llcache_query_callback cb, void *pw);
 
+/**
+ * Finalise the low-level cache
+ */
+void llcache_finalise(void);
+
 /**
  * Cause the low-level cache to emit any pending notifications 
  * and attempt to clean the cache. No guarantee is made about

desktop/netsurf.c

@@ -187,6 +187,10 @@ void netsurf_exit(void)
 	utf8_finalise();
 	LOG(("Destroying URLdb"));
 	urldb_destroy();
+	LOG(("Finalising high-level cache"));
+	hlcache_finalise();
+	LOG(("Finalising low-level cache"));
+	llcache_finalise();
 	LOG(("Exited successfully"));
 }