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/*
* 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 <parc/assert/parc_Assert.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));
parcAssertNotNull(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);
parcAssertNotNull(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);
parcAssertNotNull(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);
parcAssertNotNull(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);
parcAssertNotNull(*parcEventTimer, "parcEventTimer_Destroy must be passed a valid parcEventTimer!");
parcAssertNotNull((*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;
}
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