[PATCH 5/6] dbus: Add convenient API for calling method on proxy interface

[Szymon Janc <szymon.janc@codecoup.pl>]

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This is wrapper around l_dbus_method_call that allows to cancel call
both by removed proxy and caller.
---
 ell/dbus-client.c | 31 +++++++++++++++++++++++++++++++
 ell/dbus-client.h |  8 ++++++++
 2 files changed, 39 insertions(+)

diff --git a/ell/dbus-client.c b/ell/dbus-client.c
index 0d69e4b..5a48e52 100644
--- a/ell/dbus-client.c
+++ b/ell/dbus-client.c
@@ -280,6 +280,37 @@ LIB_EXPORT bool l_dbus_proxy_set_property(struct l_dbus_proxy *proxy,
 	return true;
 }
 
+LIB_EXPORT uint32_t l_dbus_proxy_method_call(struct l_dbus_proxy *proxy,
+					const char *method,
+					l_dbus_message_func_t setup,
+					l_dbus_client_proxy_result_func_t reply,
+					void *user_data,
+					l_dbus_destroy_func_t destroy)
+{
+	struct method_call_request *req;
+
+	req = l_new(struct method_call_request, 1);
+	req->proxy = proxy;
+	req->result = reply;
+	req->user_data = user_data;
+	req->destroy = destroy;
+
+	req->call_id = l_dbus_method_call(proxy->client->dbus,
+						proxy->client->service,
+						proxy->path, proxy->interface,
+						method, setup,
+						method_call_reply, req,
+						method_call_request_free);
+	if (!req->call_id) {
+		l_free(req);
+		return 0;
+	}
+
+	l_queue_push_tail(proxy->pending_calls, L_UINT_TO_PTR(req->call_id));
+
+	return req->call_id;
+}
+
 static void proxy_update_property(struct l_dbus_proxy *proxy,
 					const char *name,
 					struct l_dbus_message_iter *property)
diff --git a/ell/dbus-client.h b/ell/dbus-client.h
index 928dcec..699d824 100644
--- a/ell/dbus-client.h
+++ b/ell/dbus-client.h
@@ -83,6 +83,14 @@ bool l_dbus_proxy_set_property(struct l_dbus_proxy *proxy,
 				l_dbus_client_proxy_result_func_t result,
 				void *user_data, l_dbus_destroy_func_t destroy,
 				const char *name, const char *signature, ...);
+
+uint32_t l_dbus_proxy_method_call(struct l_dbus_proxy *proxy,
+					const char *method,
+					l_dbus_message_func_t setup,
+					l_dbus_client_proxy_result_func_t reply,
+					void *user_data,
+					l_dbus_destroy_func_t destroy);
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.14.3