coroutine: add qemu_co_queue_restart_all()

It's common to wake up all waiting coroutines.  Introduce the
qemu_co_queue_restart_all() function to do this instead of looping over
qemu_co_queue_next() in every caller.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/qemu-coroutine.h b/qemu-coroutine.h
index 8a2e5d2a10..8a55fe125e 100644
--- a/qemu-coroutine.h
+++ b/qemu-coroutine.h
@@ -131,6 +131,11 @@ void coroutine_fn qemu_co_queue_wait_insert_head(CoQueue *queue);
 bool qemu_co_queue_next(CoQueue *queue);
 
 /**
+ * Restarts all coroutines in the CoQueue and leaves the queue empty.
+ */
+void qemu_co_queue_restart_all(CoQueue *queue);
+
+/**
  * Checks if the CoQueue is empty.
  */
 bool qemu_co_queue_empty(CoQueue *queue);