Add support for sending and receiving D-Bus signals.

ObjectProxy is used to receive signals from the remote object.
ExportedObject is used to send signals from the exported object.

Note that signals are asynchronos so we don't have a test in
end_to_end_sync_unittest.cc

BUG=90036
TEST=run unit tests


Review URL: http://codereview.chromium.org/7655033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@97831 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 25 insertions, 0 deletions

diff --git a/dbus/message.cc b/dbus/message.cc
index 9216515..8de6583 100644
--- a/dbus/message.cc
+++ b/dbus/message.cc
@@ -332,6 +332,31 @@ MethodCall* MethodCall::FromRawMessage(DBusMessage* raw_message) {
 }
 
 //
+// Signal implementation.
+//
+Signal::Signal(const std::string& interface_name,
+               const std::string& method_name)
+    : Message() {
+  reset_raw_message(dbus_message_new(DBUS_MESSAGE_TYPE_SIGNAL));
+
+  SetInterface(interface_name);
+  SetMember(method_name);
+}
+
+Signal* Signal::FromRawMessage(DBusMessage* raw_message) {
+  DCHECK_EQ(DBUS_MESSAGE_TYPE_SIGNAL, dbus_message_get_type(raw_message));
+
+  const char* interface = dbus_message_get_interface(raw_message);
+  const char* member = dbus_message_get_member(raw_message);
+  std::string interface_string = interface ? interface : "";
+  std::string member_string = member ? member : "";
+
+  Signal* signal = new Signal(interface_string, member_string);
+  signal->reset_raw_message(raw_message);
+  return signal;
+}
+
+//
 // Response implementation.
 //