From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 18 Oct 2012 14:49:29 +0000 (+0200)
Subject: qmp: add pull_event function
X-Git-Tag: v1.3.0-rc0~143^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9eb80eadd498fae2ad9eecbb89646b0cc4929cac;p=thirdparty%2Fqemu.git

qmp: add pull_event function

This function is unlike get_events in that it makes it easy to process
one event at a time.  This is useful in the mirroring test cases, where
we want to process just one event (BLOCK_JOB_ERROR) and leave the others
to a helper function.

Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---

diff --git a/QMP/qmp.py b/QMP/qmp.py
index 32510a176a2..c551df1ed7f 100644
--- a/QMP/qmp.py
+++ b/QMP/qmp.py
@@ -136,6 +136,26 @@ class QEMUMonitorProtocol:
             raise Exception(ret['error']['desc'])
         return ret['return']
 
+    def pull_event(self, wait=False):
+        """
+        Get and delete the first available QMP event.
+
+        @param wait: block until an event is available (bool)
+        """
+        self.__sock.setblocking(0)
+        try:
+            self.__json_read()
+        except socket.error, err:
+            if err[0] == errno.EAGAIN:
+                # No data available
+                pass
+        self.__sock.setblocking(1)
+        if not self.__events and wait:
+            self.__json_read(only_event=True)
+        event = self.__events[0]
+        del self.__events[0]
+        return event
+
     def get_events(self, wait=False):
         """
         Get a list of available QMP events.