Work queues refactoring.

src/nxt_buf.c

@@ -10,6 +10,18 @@
 static void nxt_buf_completion(nxt_task_t *task, void *obj, void *data);
 
 
+void
+nxt_buf_mem_init(nxt_buf_t *b, void *start, size_t size)
+{
+    b->size = NXT_BUF_MEM_SIZE;
+
+    b->mem.start = start;
+    b->mem.pos = start;
+    b->mem.free = start;
+    b->mem.end = start + size;
+}
+
+
 nxt_buf_t *
 nxt_buf_mem_alloc(nxt_mem_pool_t *mp, size_t size, nxt_uint_t flags)
 {