# HG changeset patch
# User Igor Sysoev <igor@sysoev.ru>
# Date 1064421853 0
# Node ID 949f45d1589af7f0b2afd5278e28c44cc1fc7784
# Parent  049e78b1f852ad2668d7d10e7262cc3f685ac011
nginx-0.0.1-2003-09-24-20:44:13 import

diff --git a/src/core/ngx_hunk.c b/src/core/ngx_hunk.c
--- a/src/core/ngx_hunk.c
+++ b/src/core/ngx_hunk.c
@@ -97,3 +97,43 @@ ngx_hunk_t *ngx_create_hunk_after(ngx_po
 
     return h;
 }
+
+
+void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
+                             ngx_chain_t **out)
+{
+    ngx_chain_t  *te;
+
+    if (*busy == NULL) {
+        *busy = *out;
+
+    } else {
+        for (te = *busy; /* void */ ; te = te->next) {
+            if (te->next == NULL) {
+                te->next = *out;
+                break;
+            }   
+        }
+    }
+
+    *out = NULL;
+
+    while (*busy) {
+        if ((*busy)->hunk->pos != (*busy)->hunk->last) {
+            break;
+        }
+
+#if (HAVE_WRITE_ZEROCOPY)
+        if ((*busy)->hunk->type & NGX_HUNK_ZEROCOPY_BUSY) {
+            break;
+        }
+#endif
+
+        (*busy)->hunk->pos = (*busy)->hunk->last = (*busy)->hunk->start;
+
+        te = *busy;
+        *busy = (*busy)->next;
+        te->next = *free;
+        *free = te;
+    }
+}