Switch to libsystemd events

This patch removes part of code that are
not specific in favour of a more shared
library.

Change-Id: I3506e7514181cfbed753559bb65460f95b2141c9
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 89 insertions, 0 deletions

diff --git a/src/afb-common.c b/src/afb-common.c
new file mode 100644
index 00000000..e8fe4b72
--- /dev/null
+++ b/src/afb-common.c
@@ -0,0 +1,89 @@
+/* 
+ * Copyright (C) 2015 "IoT.bzh"
+ * Author José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <systemd/sd-event.h>
+#include <systemd/sd-bus.h>
+
+#include "afb-common.h"
+
+/*
+struct sd_event *afb_common_get_thread_event_loop()
+{
+	sd_event *result;
+	int rc = sd_event_default(&result);
+	if (rc != 0) {
+		errno = -rc;
+		result = NULL;
+	}
+	return result;
+}
+*/
+
+static void *sdopen(void **p, int (*f)(void **))
+{
+	if (*p == NULL) {
+		int rc = f(p);
+		if (rc < 0) {
+			errno = -rc;
+			*p = NULL;
+		}
+	}
+	return *p;
+}
+
+static struct sd_bus *sdbusopen(struct sd_bus **p, int (*f)(struct sd_bus **))
+{
+	if (*p == NULL) {
+		int rc = f(p);
+		if (rc < 0) {
+			errno = -rc;
+			*p = NULL;
+		} else {
+			rc = sd_bus_attach_event(*p, afb_common_get_event_loop(), 0);
+			if (rc < 0) {
+				sd_bus_unref(*p);
+				errno = -rc;
+				*p = NULL;
+			}
+		}
+	}
+	return *p;
+}
+
+struct sd_event *afb_common_get_event_loop()
+{
+	static sd_event *result = NULL;
+	return sdopen((void*)&result, (void*)sd_event_new);
+}
+
+struct sd_bus *afb_common_get_user_bus()
+{
+	static struct sd_bus *result = NULL;
+	return sdbusopen((void*)&result, (void*)sd_bus_open_user);
+}
+
+struct sd_bus *afb_common_get_system_bus()
+{
+	static struct sd_bus *result = NULL;
+	return sdbusopen((void*)&result, (void*)sd_bus_open_system);
+}
+
+
+