blockjob: Add block_job_yield()
This will unset busy flag and put coroutine to sleep, can be used to
wait for QMP complete/cancel.
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/blockjob.c b/blockjob.c
index 4da86cd..a6db01e 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -210,6 +210,20 @@
job->busy = true;
}
+void block_job_yield(BlockJob *job)
+{
+ assert(job->busy);
+
+ /* Check cancellation *before* setting busy = false, too! */
+ if (block_job_is_cancelled(job)) {
+ return;
+ }
+
+ job->busy = false;
+ qemu_coroutine_yield();
+ job->busy = true;
+}
+
BlockJobInfo *block_job_query(BlockJob *job)
{
BlockJobInfo *info = g_new0(BlockJobInfo, 1);
