libqtest: add qmp_eventwait

Allow the user to poll until a desired interrupt occurs.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1426018503-821-4-git-send-email-jsnow@redhat.com

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/libqtest.c b/tests/libqtest.c
index 12d65bd1e6..e2d01b47a2 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -450,6 +450,22 @@ void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...)
     QDECREF(response);
 }
 
+void qtest_qmp_eventwait(QTestState *s, const char *event)
+{
+    QDict *response;
+
+    for (;;) {
+        response = qtest_qmp_receive(s);
+        if ((qdict_haskey(response, "event")) &&
+            (strcmp(qdict_get_str(response, "event"), event) == 0)) {
+            QDECREF(response);
+            break;
+        }
+        QDECREF(response);
+    }
+}
+
+
 const char *qtest_get_arch(void)
 {
     const char *qemu = getenv("QTEST_QEMU_BINARY");