CoQueue: introduce qemu_co_queue_wait_insert_head

Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/qemu-coroutine.h b/qemu-coroutine.h
index b8fc4f4332..8a2e5d2a10 100644
--- a/qemu-coroutine.h
+++ b/qemu-coroutine.h
@@ -118,6 +118,12 @@ void qemu_co_queue_init(CoQueue *queue);
 void coroutine_fn qemu_co_queue_wait(CoQueue *queue);
 
 /**
+ * Adds the current coroutine to the head of the CoQueue and transfers control to the
+ * caller of the coroutine.
+ */
+void coroutine_fn qemu_co_queue_wait_insert_head(CoQueue *queue);
+
+/**
  * Restarts the next coroutine in the CoQueue and removes it from the queue.
  *
  * Returns true if a coroutine was restarted, false if the queue is empty.