modules/timestamp: add node type to get current time

Signed-off-by: Bruno Dilly <bruno.dilly@intel.com>

src/lib/flow/Kconfig

@@ -70,6 +70,7 @@ source "src/modules/flow/temperature/Kconfig"
 source "src/modules/flow/test/Kconfig"
 source "src/modules/flow/thingspeak/Kconfig"
 source "src/modules/flow/timer/Kconfig"
+source "src/modules/flow/timestamp/Kconfig"
 source "src/modules/flow/trigonometry/Kconfig"
 source "src/modules/flow/udev/Kconfig"
 source "src/modules/flow/unix-socket/Kconfig"

src/modules/flow/timestamp/Kconfig

@@ -0,0 +1,3 @@
+config FLOW_NODE_TYPE_TIMESTAMP
+	tristate "Node type: timestamp"
+	default y

src/modules/flow/timestamp/Makefile

@@ -0,0 +1,2 @@
+obj-$(FLOW_NODE_TYPE_TIMESTAMP) += timestamp.mod
+obj-timestamp-$(FLOW_NODE_TYPE_TIMESTAMP) := timestamp.json timestamp.o

src/modules/flow/timestamp/timestamp.c

@@ -0,0 +1,58 @@
+/*
+ * This file is part of the Soletta Project
+ *
+ * Copyright (C) 2015 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "timestamp-gen.h"
+#include "sol-flow-internal.h"
+
+#include <sol-util.h>
+#include <errno.h>
+#include <time.h>
+
+
+static int
+time_process(struct sol_flow_node *node, void *data, uint16_t port, uint16_t conn_id, const struct sol_flow_packet *packet)
+{
+    struct timespec current_time;
+    int r;
+
+    r = sol_util_timespec_get_realtime(&current_time);
+    if (r < 0) {
+        sol_flow_send_error_packet(node, r,
+            "Could not fetch current time: %s", sol_util_strerrora(r));
+        return 0;
+    }
+
+    return sol_flow_send_timestamp_packet(node,
+        SOL_FLOW_NODE_TYPE_TIMESTAMP_TIME__OUT__OUT, &current_time);
+}
+
+#include "timestamp-gen.c"

src/modules/flow/timestamp/timestamp.json

@@ -0,0 +1,35 @@
+{
+  "$schema": "http://solettaproject.github.io/soletta/schemas/node-type-genspec.schema",
+  "name": "timestamp",
+  "meta": {
+    "author": "Intel Corporation",
+    "license": "BSD 3-Clause",
+    "version": "1"
+  },
+  "types": [
+    {
+      "category": "timestamp",
+      "description": "Provides timestamp packets with current time",
+      "in_ports": [
+       {
+         "data_type": "any",
+         "description": "Triggers emission of packet with current time.",
+         "methods": {
+           "process": "time_process"
+         },
+         "name": "TRIGGER",
+         "required": true
+       }
+      ],
+      "name": "timestamp/time",
+      "out_ports": [
+        {
+          "data_type": "timestamp",
+          "description": "Packet with current time.",
+          "name": "OUT"
+        }
+      ],
+      "url": "http://solettaproject.org/doc/latest/node_types/timestamp/time.html"
+    }
+  ]
+}