X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftal%2Ftal.h;h=3da1e4203d8edcb332e4701d876c05091977acbc;hp=28be3f2034c133b276bc1a9e7f803df6fa033469;hb=291237b4fed863be74051274ac5ad9920cb33cc3;hpb=680aa496521811e7c60afb940bcae5024f4c6adb

diff --git a/ccan/tal/tal.h b/ccan/tal/tal.h
index 28be3f20..3da1e420 100644
--- a/ccan/tal/tal.h
+++ b/ccan/tal/tal.h
@@ -110,7 +110,22 @@ void *tal_free(const tal_t *p);
  *	tal_resize(&p, 100);
  */
 #define tal_resize(p, count) \
-	tal_resize_((void **)(p), sizeof**(p), (count))
+	tal_resize_((void **)(p), sizeof**(p), (count), false)
+
+/**
+ * tal_resizez - enlarge or reduce a tal_arr[z]; zero out extra.
+ * @p: A pointer to the tal allocated array to resize.
+ * @count: the number to allocate.
+ *
+ * This returns true on success (and may move *@p), or false on failure.
+ * If @p has a length property, it is updated on success.
+ * On expand, new elements are memset to 0 bytes.
+ *
+ * Example:
+ *	tal_resizez(&p, 200);
+ */
+#define tal_resizez(p, count) \
+	tal_resize_((void **)(p), sizeof**(p), (count), true)
 
 /**
  * tal_steal - change the parent of a tal-allocated pointer.
@@ -327,15 +342,29 @@ void tal_set_backend(void *(*alloc_fn)(size_t size),
 	tal_expand_((void **)(a1p), (a2), sizeof**(a1p),	\
 		    (num2) + 0*sizeof(*(a1p) == (a2)))
 
+/**
+ * tal_cleanup - remove pointers from NULL node
+ *
+ * Internally, tal keeps a list of nodes allocated from @ctx NULL; this
+ * prevents valgrind from noticing memory leaks.  This re-initializes
+ * that list to empty.
+ *
+ * It also calls take_cleanup() for you.
+ */
+void tal_cleanup(void);
+
 
 /**
- * tal_check - set the allocation or error functions to use
+ * tal_check - sanity check a tal context and its children.
  * @ctx: a tal context, or NULL.
  * @errorstr: a string to prepend calls to error_fn, or NULL.
  *
  * This sanity-checks a tal tree (unless NDEBUG is defined, in which case
  * it simply returns true).  If errorstr is not null, error_fn is called
  * when a problem is found, otherwise it is not.
+ *
+ * See also:
+ *	tal_set_backend()
  */
 bool tal_check(const tal_t *ctx, const char *errorstr);
 
@@ -395,7 +424,7 @@ void *tal_dup_(const tal_t *ctx, const void *p, size_t size,
 
 tal_t *tal_steal_(const tal_t *new_parent, const tal_t *t);
 
-bool tal_resize_(tal_t **ctxp, size_t size, size_t count);
+bool tal_resize_(tal_t **ctxp, size_t size, size_t count, bool clear);
 bool tal_expand_(tal_t **ctxp, const void *src, size_t size, size_t count);
 
 bool tal_add_destructor_(const tal_t *ctx, void (*destroy)(void *me));