coroutine: add qemu_coroutine_entered() function

See the doc comments for a description of this new coroutine API.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 1474989516-18255-2-git-send-email-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/util/qemu-coroutine.c b/util/qemu-coroutine.c
index 3cbf225487..737bffa984 100644
--- a/util/qemu-coroutine.c
+++ b/util/qemu-coroutine.c
@@ -146,3 +146,8 @@ void coroutine_fn qemu_coroutine_yield(void)
     self->caller = NULL;
     qemu_coroutine_switch(self, to, COROUTINE_YIELD);
 }
+
+bool qemu_coroutine_entered(Coroutine *co)
+{
+    return co->caller;
+}