add custom destroy function for free list

daemon/bencode.c

@@ -20,6 +20,7 @@ struct __bencode_buffer_piece {
 };
 struct __bencode_free_list {
 	void *ptr;
+	free_func_t func;
 	struct __bencode_free_list *next;
 };
 struct __bencode_hash {
@@ -129,7 +130,7 @@ void bencode_buffer_free(bencode_buffer_t *buf) {
 	struct __bencode_buffer_piece *piece, *next;
 
 	for (fl = buf->free_list; fl; fl = fl->next)
-		BENCODE_FREE(fl->ptr);
+		fl->func(fl->ptr);
 
 	for (piece = buf->pieces; piece; piece = next) {
 		next = piece->next;
@@ -664,7 +665,7 @@ bencode_item_t *bencode_dictionary_get_len(bencode_item_t *dict, const char *key
 	return NULL;
 }
 
-void bencode_buffer_freelist_add(bencode_buffer_t *buf, void *p) {
+void bencode_buffer_destroy_add(bencode_buffer_t *buf, free_func_t func, void *p) {
 	struct __bencode_free_list *li;
 
 	if (!p)
@@ -673,6 +674,7 @@ void bencode_buffer_freelist_add(bencode_buffer_t *buf, void *p) {
 	if (!li)
 		return;
 	li->ptr = p;
+	li->func = func;
 	li->next = buf->free_list;
 	buf->free_list = li;
 }

daemon/bencode.h

@@ -30,6 +30,7 @@ struct __bencode_free_list;
 typedef enum bencode_type bencode_type_t;
 typedef struct bencode_buffer bencode_buffer_t;
 typedef struct bencode_item bencode_item_t;
+typedef void (*free_func_t)(void *);
 
 enum bencode_type {
 	BENCODE_INVALID = 0,
@@ -84,7 +85,11 @@ bencode_item_t *bencode_list(bencode_buffer_t *buf);
 
 /* Adds a pointer to the bencode_buffer_t object's internal free list. When the bencode_buffer_t
  * object is destroyed, BENCODE_FREE will be called on this pointer. */
-void bencode_buffer_freelist_add(bencode_buffer_t *buf, void *);
+static inline void bencode_buffer_freelist_add(bencode_buffer_t *buf, void *);
+
+/* Similar to bencode_buffer_freelist_add(), but instead of freeing/destroying the object at the
+ * given pointer with BENCODE_FREE, the specified destroy function is called. */
+void bencode_buffer_destroy_add(bencode_buffer_t *buf, free_func_t, void *);
 
 
 
@@ -460,4 +465,8 @@ static inline str *bencode_get_str(bencode_item_t *in, str *out) {
 	return out;
 }
 
+static inline void bencode_buffer_freelist_add(bencode_buffer_t *buf, void *p) {
+	bencode_buffer_destroy_add(buf, BENCODE_FREE, p);
+}
+
 #endif