shared-qmi: new interface to handle common QMI implementations

This new interface will include implementations that are shared
between the MMBroadbandModemQmi and the MMBroadbandModemMbim.

For now, it just provides a way to implement the common client
allocation methods.

src/mm-shared-qmi.h

@@ -0,0 +1,60 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2018 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#ifndef MM_SHARED_QMI_H
+#define MM_SHARED_QMI_H
+
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+
+#include <libqmi-glib.h>
+
+#include "mm-iface-modem.h"
+#include "mm-port-qmi.h"
+
+#define MM_TYPE_SHARED_QMI            (mm_shared_qmi_get_type ())
+#define MM_SHARED_QMI(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MM_TYPE_SHARED_QMI, MMSharedQmi))
+#define MM_IS_SHARED_QMI(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MM_TYPE_SHARED_QMI))
+#define MM_SHARED_QMI_GET_INTERFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), MM_TYPE_SHARED_QMI, MMSharedQmi))
+
+typedef struct _MMSharedQmi MMSharedQmi;
+
+struct _MMSharedQmi {
+    GTypeInterface g_iface;
+
+    QmiClient * (* peek_client) (MMSharedQmi    *self,
+                                 QmiService      service,
+                                 MMPortQmiFlag   flag,
+                                 GError        **error);
+};
+
+GType mm_shared_qmi_get_type (void);
+
+QmiClient *mm_shared_qmi_peek_client   (MMSharedQmi          *self,
+                                        QmiService            service,
+                                        MMPortQmiFlag         flag,
+                                        GError              **error);
+
+gboolean   mm_shared_qmi_ensure_client (MMSharedQmi          *self,
+                                        QmiService            service,
+                                        QmiClient           **o_client,
+                                        GAsyncReadyCallback   callback,
+                                        gpointer              user_data);
+
+
+#endif /* MM_SHARED_QMI_H */