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Fri, 27 Dec 2019 13:41:11 +0000 (UTC) From: Wainer dos Santos Moschetta To: qemu-devel@nongnu.org Subject: [PATCH 4/5] python/qemu: qmp: Make QEMUMonitorProtocol a context manager Date: Fri, 27 Dec 2019 10:41:00 -0300 Message-Id: <20191227134101.244496-5-wainersm@redhat.com> In-Reply-To: <20191227134101.244496-1-wainersm@redhat.com> References: <20191227134101.244496-1-wainersm@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-MC-Unique: BTa-AUmoOjWvixkFlInXAw-1 X-Mimecast-Spam-Score: 0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ehabkost@redhat.com, crosa@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This implement the __enter__ and __exit__ functions on QEMUMonitorProtocol class so that it can be used on 'with' statement and the resources will be free up on block end: with QEMUMonitorProtocol(socket_path) as qmp: qmp.connect() qmp.command('query-status') Signed-off-by: Wainer dos Santos Moschetta --- python/qemu/qmp.py | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py index 914b8c6774..6d55f53595 100644 --- a/python/qemu/qmp.py +++ b/python/qemu/qmp.py @@ -139,6 +139,15 @@ class QEMUMonitorProtocol: raise QMPConnectError("Error while reading from socket") self.__sock.settimeout(None) + def __enter__(self): + # Implement context manager enter function. + return self + + def __exit__(self, exc_type, exc_value, exc_traceback): + # Implement context manager exit function. + self.close() + return False + def connect(self, negotiate=True): """ Connect to the QMP Monitor and perform capabilities negotiation. @@ -259,8 +268,10 @@ class QEMUMonitorProtocol: """ Close the socket and socket file. """ - self.__sock.close() - self.__sockfile.close() + if self.__sock: + self.__sock.close() + if self.__sockfile: + self.__sockfile.close() def settimeout(self, timeout): """