From 800cec7311955e1d9dfd2b9f881712d002090f3a Mon Sep 17 00:00:00 2001
From: imarkov <imarkov@tarantool.org>
Date: Tue, 20 Feb 2018 10:14:50 +0300
Subject: [PATCH] coio: Modify coio_task_post behavior
Remove yielding and waiting task complete in coio_task_post
in case if timeout is zero.
This patch is inspired by the need in log_rotate posting coio
task. This post should not yield there because the implementation
of multiple loggers works with linked list structure of loggers
which is not fiber-safe.
---
src/coio_task.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/src/coio_task.c b/src/coio_task.c
index 0ba83a5a32..61f376203d 100644
--- a/src/coio_task.c
+++ b/src/coio_task.c
@@ -234,6 +234,15 @@ coio_task_post(struct coio_task *task, double timeout)
assert(task->fiber == fiber());
eio_submit(&task->base);
+ if (timeout == 0) {
+ /*
+ * This is a special case:
+ * we don't wait any response from the task
+ * and just perform just asynchronous post.
+ */
+ task->fiber = NULL;
+ return 0;
+ }
fiber_yield_timeout(timeout);
if (!task->complete) {
/* timed out or cancelled. */
--
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