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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_EventScheduler.h>
#include <parc/algol/parc_EventSignal.h>
#include <parc/algol/parc_FileOutputStream.h>
#include <parc/logging/parc_Log.h>
#include <parc/logging/parc_LogReporterFile.h>
static int _parc_event_signal_debug_enabled = 0;
#define parcEventSignal_LogDebug(parcEventSignal, ...) \
if (_parc_event_signal_debug_enabled) \
parcLog_Debug(parcEventScheduler_GetLogger(parcEventSignal->eventScheduler), __VA_ARGS__)
/**
* Current implementation based on top of libevent2
*/
#include <event2/event.h>
#include <event2/util.h>
struct PARCEventSignal {
/**
* The event instance.
*/
struct event *event;
// Event scheduler we have been queued with
PARCEventScheduler *eventScheduler;
PARCEventSignal_Callback *callback;
void *callbackUserData;
};
static void
_parc_event_signal_callback(evutil_socket_t fd, short flags, void *context)
{
PARCEventSignal *parcEventSignal = (PARCEventSignal *) context;
parcEventSignal_LogDebug(parcEventSignal,
"_parc_event_signal_callback(fd=%x,flags=%x,parcEventSignal=%p)\n",
fd, flags, parcEventSignal);
parcEventSignal->callback((int) fd, internal_libevent_type_to_PARCEventType(flags),
parcEventSignal->callbackUserData);
}
PARCEventSignal *
parcEventSignal_Create(PARCEventScheduler *eventScheduler, int signal, PARCEventType flags, PARCEvent_Callback *callback, void *callbackArgs)
{
PARCEventSignal *parcEventSignal = parcMemory_Allocate(sizeof(PARCEventSignal));
parcAssertNotNull(parcEventSignal, "parcMemory_Allocate(%zu) returned NULL", sizeof(PARCEventSignal));
parcEventSignal->eventScheduler = eventScheduler;
parcEventSignal->callback = callback;
parcEventSignal->callbackUserData = callbackArgs;
parcEventSignal->event = event_new(parcEventScheduler_GetEvBase(eventScheduler), signal,
internal_PARCEventType_to_libevent_type(flags),
_parc_event_signal_callback, parcEventSignal);
parcAssertNotNull(parcEventSignal->event, "Could not create a new event!");
parcEventSignal_LogDebug(parcEventSignal,
"parcEventSignal_Create(base=%p,signal=%x,flags=%x,cb=%p,args=%p) = %p\n",
parcEventScheduler_GetEvBase(eventScheduler), signal, flags,
callback, callbackArgs, parcEventSignal);
return parcEventSignal;
}
int
parcEventSignal_Start(PARCEventSignal *parcEventSignal)
{
parcEventSignal_LogDebug(parcEventSignal, "parcEventSignal_Start(event=%p)\n", parcEventSignal);
parcAssertNotNull(parcEventSignal, "parcEventStart_Signal must be passed a valid event!");
int result = event_add(parcEventSignal->event, NULL);
return result;
}
int
parcEventSignal_Stop(PARCEventSignal *parcEventSignal)
{
parcEventSignal_LogDebug(parcEventSignal, "parcEventSignal_Stop(event=%p)\n", parcEventSignal);
parcAssertNotNull(parcEventSignal, "parcEvent_Stop must be passed a valid event!");
int result = event_del(parcEventSignal->event);
return result;
}
void
parcEventSignal_Destroy(PARCEventSignal **parcEventSignal)
{
parcEventSignal_LogDebug((*parcEventSignal), "parcEventSignal_Destroy(event=%p)\n", parcEventSignal);
parcAssertNotNull(*parcEventSignal, "parcEvent_Destroy must be passed a valid parcEventSignal!");
parcAssertNotNull((*parcEventSignal)->event, "parcEvent_Destroy passed a null event!");
event_free((*parcEventSignal)->event);
parcMemory_Deallocate((void **) parcEventSignal);
}
void
parcEventSignal_EnableDebug(void)
{
_parc_event_signal_debug_enabled = 1;
}
void
parcEventSignal_DisableDebug(void)
{
_parc_event_signal_debug_enabled = 0;
}
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