From ec688b4723a041044226358bcd4dd6e2da39da49 Mon Sep 17 00:00:00 2001
From: Luca Muscariello <lumuscar+fdio@cisco.com>
Date: Thu, 23 Feb 2017 17:01:02 +0100
Subject: Initial commit: cframework. Longbow and Libparc

Change-Id: I90378dbd30da6033b20fb1f829b3b822cf366c59
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
---
 libparc/parc/algol/parc_EventTimer.c | 128 +++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100755 libparc/parc/algol/parc_EventTimer.c

(limited to 'libparc/parc/algol/parc_EventTimer.c')

diff --git a/libparc/parc/algol/parc_EventTimer.c b/libparc/parc/algol/parc_EventTimer.c
new file mode 100755
index 00000000..529188b1
--- /dev/null
+++ b/libparc/parc/algol/parc_EventTimer.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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.
+ */
+
+/**
+ */
+#include <config.h>
+
+#include <LongBow/runtime.h>
+
+#include "internal_parc_Event.h"
+#include <parc/algol/parc_EventTimer.h>
+
+static int _parc_event_timer_debug_enabled = 0;
+
+#define parcEventTimer_LogDebug(parcEventTimer, ...) \
+    if (_parc_event_timer_debug_enabled) \
+        parcLog_Debug(parcEventScheduler_GetLogger(parcEventTimer->eventScheduler), __VA_ARGS__)
+
+/**
+ * Current implementation based on top of libevent2
+ */
+#include <event2/event.h>
+#include <event2/util.h>
+
+struct PARCEventTimer {
+    /**
+     * The event instance.
+     */
+    struct event *event;
+
+    // Event scheduler we have been queued with
+    PARCEventScheduler *eventScheduler;
+
+    PARCEventTimer_Callback *callback;
+    void *callbackUserData;
+};
+
+static void
+_parc_event_timer_callback(evutil_socket_t fd, short flags, void *context)
+{
+    PARCEventTimer *parcEventTimer = (PARCEventTimer *) context;
+    parcEventTimer_LogDebug(parcEventTimer,
+                            "_parc_event_timer_callback(fd=%x,flags=%x,parcEventTimer=%p)\n",
+                            fd, flags, parcEventTimer);
+    parcEventTimer->callback((int) fd, internal_libevent_type_to_PARCEventType(flags),
+                             parcEventTimer->callbackUserData);
+}
+
+PARCEventTimer *
+parcEventTimer_Create(PARCEventScheduler *eventScheduler, PARCEventType flags, PARCEvent_Callback *callback, void *callbackArgs)
+{
+    PARCEventTimer *parcEventTimer = parcMemory_Allocate(sizeof(PARCEventTimer));
+    assertNotNull(parcEventTimer, "parcMemory_Allocate(%zu) returned NULL", sizeof(PARCEventTimer));
+
+    parcEventTimer->eventScheduler = eventScheduler;
+    parcEventTimer->callback = callback;
+    parcEventTimer->callbackUserData = callbackArgs;
+
+    // NB: the EV_TIMEOUT flag is ignored when constructing an event
+    parcEventTimer->event = event_new(parcEventScheduler_GetEvBase(eventScheduler), -1,
+                                      internal_PARCEventType_to_libevent_type(flags),
+                                      _parc_event_timer_callback, parcEventTimer);
+    assertNotNull(parcEventTimer->event, "Could not create a new event!");
+
+    parcEventTimer_LogDebug(parcEventTimer,
+                            "parcEventTimer_Create(base=%p,events=%x,cb=%p,args=%p) = %p\n",
+                            parcEventScheduler_GetEvBase(eventScheduler), flags,
+                            callback, callbackArgs, parcEventTimer);
+
+    return parcEventTimer;
+}
+
+int
+parcEventTimer_Start(PARCEventTimer *parcEventTimer, struct timeval *timeout)
+{
+    parcEventTimer_LogDebug(parcEventTimer,
+                            "parcEventTimer_Start(event=%p, timeout=%d:%d)\n",
+                            parcEventTimer, timeout->tv_sec, timeout->tv_usec);
+    assertNotNull(parcEventTimer, "parcEventTimer_Start must be passed a valid event!");
+
+    int result = event_add(parcEventTimer->event, timeout);
+    return result;
+}
+
+int
+parcEventTimer_Stop(PARCEventTimer *parcEventTimer)
+{
+    parcEventTimer_LogDebug(parcEventTimer, "parcEventTimer_Stop(event=%p)\n", parcEventTimer);
+    assertNotNull(parcEventTimer, "parcEventTimer_Stop must be passed a valid event!");
+
+    int result = event_del(parcEventTimer->event);
+    return result;
+}
+
+void
+parcEventTimer_Destroy(PARCEventTimer **parcEventTimer)
+{
+    parcEventTimer_LogDebug((*parcEventTimer), "parcEventTimer_Destroy(parcEventTimer=%p)\n", *parcEventTimer);
+    assertNotNull(*parcEventTimer, "parcEventTimer_Destroy must be passed a valid parcEventTimer!");
+    assertNotNull((*parcEventTimer)->event, "parcEventTimer_Destroy passed a null event!");
+
+    event_free((*parcEventTimer)->event);
+    parcMemory_Deallocate((void **) parcEventTimer);
+}
+
+void
+parcEventTimer_EnableDebug(void)
+{
+    _parc_event_timer_debug_enabled = 1;
+}
+
+void
+parcEventTimer_DisableDebug(void)
+{
+    _parc_event_timer_debug_enabled = 0;
+}
-- 
cgit 1.2.3-korg