share MessageEngine instance

Share MessageEngine instance among clients in the
same process using a common socket (same url).

- add MessageEngineFactory class;
- extend std::unordered_map<> to use QString as
key;
- use std::shared_ptr<MessageEngine> to share
ownership among MessageEngineFactory and the
engine clients;
- force MessagEngine parent object null to avoid
life cycle dependency on a parent;
- protect insertions & deletions in m_calls map;

Also, not directly related but as part of testing
these changes: cleanup on voice to remove
superflous model sorting (there's just one voice
model for alexa voice agent).

Bug-AGL: SPEC-3112
Signed-off-by: Raquel Medina <raquel.medina@konsulko.com>
Change-Id: Ie2304453dc37723dac13d256286eeb85f84ca2ab

1 files changed, 16 insertions, 0 deletions

diff --git a/utils.h b/utils.h
new file mode 100644
index 0000000..d0203f9
--- /dev/null
+++ b/utils.h
@@ -0,0 +1,16 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+#include <functional>
+#include <QHash>
+#include <QString>
+
+namespace std {
+	template<> struct hash<QString> {
+		std::size_t operator()(const QString& s) const noexcept {
+			return (size_t) qHash(s);
+		}
+	};
+}
+
+#endif