Initial version.

src/nxt_recvbuf.c

@@ -0,0 +1,82 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+nxt_uint_t
+nxt_recvbuf_mem_coalesce(nxt_recvbuf_coalesce_t *rb)
+{
+    u_char     *last;
+    size_t     size, total;
+    nxt_int_t  n;
+    nxt_buf_t  *b;
+
+    total = 0;
+    last = NULL;
+    n = -1;
+
+    for (b = rb->buf; b != NULL; b = b->next) {
+
+        nxt_prefetch(b->next);
+
+        size = b->mem.end - b->mem.free;
+
+        if (b->mem.free != last) {
+
+            if (++n >= rb->nmax) {
+                goto done;
+            }
+
+            nxt_iobuf_set(&rb->iobuf[n], b->mem.free, size);
+
+        } else {
+            nxt_iobuf_add(&rb->iobuf[n], size);
+        }
+
+        nxt_thread_log_debug("recvbuf: %ui, %p, %uz", n,
+                             nxt_iobuf_data(&rb->iobuf[n]),
+                             nxt_iobuf_size(&rb->iobuf[n]));
+
+        total += size;
+        last = b->mem.end;
+    }
+
+    n++;
+
+done:
+
+    rb->size = total;
+
+    return n;
+}
+
+
+void
+nxt_recvbuf_update(nxt_buf_t *b, size_t sent)
+{
+    size_t  size;
+
+    while (b != NULL && sent != 0) {
+
+        nxt_prefetch(b->next);
+
+        if (!nxt_buf_is_sync(b)) {
+
+            size = b->mem.end - b->mem.free;
+
+            if (sent < size) {
+                b->mem.free += sent;
+                return;
+            }
+
+            b->mem.free = b->mem.end;
+            sent -= size;
+        }
+
+        b = b->next;
+    }
+}