Pass a pointer to a hash pointer to free_hash() to ensure hash pointer

is NULL on return.

src/bfu/style.c

@@ -108,6 +108,5 @@ done_bfu_colors(void)
 		mem_free_if(item->value);
 	}
 
-	free_hash(bfu_colors);
-	bfu_colors = NULL;
+	free_hash(&bfu_colors);
 };

src/bookmarks/bookmarks.c

@@ -162,10 +162,7 @@ free_bookmarks(struct list_head *bookmarks_list,
 
 	free_list(*box_items);
 	free_list(*bookmarks_list);
-	if (bookmark_cache) {
-		free_hash(bookmark_cache);
-		bookmark_cache = NULL;
-	}
+	if (bookmark_cache) free_hash(&bookmark_cache);
 }
 
 /* Does final cleanup and saving of bookmarks */

src/document/html/renderer.c

@@ -1727,11 +1727,9 @@ free_table_cache(void)
 			mem_free_if(item->value);
 		}
 
-		free_hash(table_cache);
+		free_hash(&table_cache);
+		table_cache_entries = 0;
 	}
-
-	table_cache = NULL;
-	table_cache_entries = 0;
 }
 
 struct part *

src/globhist/globhist.c

@@ -406,8 +406,7 @@ static void
 free_global_history(void)
 {
 	if (globhist_cache) {
-		free_hash(globhist_cache);
-		globhist_cache = NULL;
+		free_hash(&globhist_cache);
 		globhist_cache_entries = 0;
 	}
 

src/main/event.c

@@ -316,13 +316,13 @@ done_event(void)
 {
 	int i;
 
-	if (event_hash)	free_hash(event_hash);
-
 	for (i = 0; i < eventssize; i++) {
 		mem_free_if(events[i].handlers);
 		mem_free(events[i].name);
 	}
 
 	mem_free_set(&events, NULL);
+
+	if (event_hash)	free_hash(&event_hash);
 	eventssize = 0;
 }

src/mime/backend/mailcap.c

@@ -438,8 +438,7 @@ done_mailcap(struct module *module)
 		mem_free(mitem);
 	}
 
-	free_hash(mailcap_map);
-	mailcap_map = NULL;
+	free_hash(&mailcap_map);
 	mailcap_map_size = 0;
 }
 

src/mime/backend/mimetypes.c

@@ -207,8 +207,7 @@ done_mimetypes(struct module *module)
 		}
 	}
 
-	free_hash(mimetypes_map);
-	mimetypes_map = NULL;
+	free_hash(&mimetypes_map);
 	mimetypes_map_size = 0;
 }
 

src/protocol/uri.c

@@ -1526,7 +1526,7 @@ get_uri(unsigned char *string, enum uri_component components)
 	entry = get_uri_cache_entry(string, strlen(string));
 	if (!entry) {
 		if (!is_object_used(&uri_cache))
-			free_hash(uri_cache.map);
+			free_hash(&uri_cache.map);
 		return NULL;
 	}
 
@@ -1560,5 +1560,5 @@ done_uri(struct uri *uri)
 	/* Last URI frees the cache */
 	object_unlock(&uri_cache);
 	if (!is_object_used(&uri_cache))
-		free_hash(uri_cache.map);
+		free_hash(&uri_cache.map);
 }

src/util/hash.c

@@ -57,17 +57,17 @@ init_hash8(void)
 }
 
 void
-free_hash(struct hash *hash)
+free_hash(struct hash **hashp)
 {
 	unsigned int i = 0;
 
-	assert(hash);
+	assert(hashp && *hashp);
 	if_assert_failed return;
 
-	for (; i < hash_size(hash->width); i++)
-		free_list(hash->hash[i]);
+	for (; i < hash_size((*hashp)->width); i++)
+		free_list((*hashp)->hash[i]);
 
-	mem_free(hash);
+	mem_free_set(hashp, NULL);
 }
 
 

src/util/hash.h

@@ -25,7 +25,7 @@ struct hash {
 
 struct hash *init_hash8(void);
 
-void free_hash(struct hash *hash);
+void free_hash(struct hash **hashp);
 
 struct hash_item *add_hash_item(struct hash *hash, unsigned char *key, unsigned int keylen, void *value);
 struct hash_item *get_hash_item(struct hash *hash, unsigned char *key, unsigned int keylen);