1 files changed, 28 insertions, 0 deletions
diff --git a/src/core/ngx_buf.c b/src/core/ngx_buf.c
index b7f597d39..31d990315 100644
--- a/src/core/ngx_buf.c
+++ b/src/core/ngx_buf.c
@@ -151,6 +151,34 @@ ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in)
 }
 
 
+ngx_chain_t *
+ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free)
+{
+    ngx_chain_t  *cl;
+
+    if (*free) {
+        cl = *free;
+        *free = cl->next;
+        cl->next = NULL;
+        return cl;
+    }
+
+    cl = ngx_alloc_chain_link(p);
+    if (cl == NULL) {
+        return NULL;
+    }
+
+    cl->buf = ngx_calloc_buf(p);
+    if (cl->buf == NULL) {
+        return NULL;
+    }
+
+    cl->next = NULL;
+
+    return cl;
+}
+
+
 void
 ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
     ngx_chain_t **out, ngx_buf_tag_t tag)