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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_Event.h>
#include <parc/algol/parc_FileOutputStream.h>
#include <parc/logging/parc_Log.h>
#include <parc/logging/parc_LogReporterFile.h>
static int _parc_event_debug_enabled = 0;
#define parcEvent_LogDebug(parcEvent, ...) \
if (_parc_event_debug_enabled) \
parcLog_Debug(parcEventScheduler_GetLogger(parcEvent->parcEventScheduler), __VA_ARGS__)
/**
* Current implementation based on top of libevent2
*/
#include <event2/event.h>
/**
* @typedef PARCEvent
* @brief A structure containing private event state data variables
*/
struct PARCEvent {
/**
* The event instance.
*/
struct event *event;
// Event scheduler we have been queued with
PARCEventScheduler *parcEventScheduler;
// Interpose on callback
PARCEvent_Callback *callback;
void *callbackUserData;
void *user_data;
};
static void
_parc_event_callback(evutil_socket_t fd, short flags, void *context)
{
PARCEvent *parcEvent = (PARCEvent *) context;
parcEvent_LogDebug(parcEvent, "_parc_event_callback(fd=%x,flags=%x,parcEvent=%p)\n", fd, flags, parcEvent);
parcEvent->callback((int) fd, internal_libevent_type_to_PARCEventType(flags), parcEvent->callbackUserData);
}
PARCEvent *
parcEvent_Create(PARCEventScheduler *parcEventScheduler, int fd, PARCEventType flags, PARCEvent_Callback *callback, void *callbackArgs)
{
PARCEvent *parcEvent = parcMemory_Allocate(sizeof(PARCEvent));
parcAssertNotNull(parcEvent, "parcMemory_Allocate(%zu) returned NULL", sizeof(PARCEvent));
parcEvent->parcEventScheduler = parcEventScheduler;
parcEvent->callback = callback;
parcEvent->callbackUserData = callbackArgs;
parcEvent->event = event_new(parcEventScheduler_GetEvBase(parcEventScheduler), fd,
internal_PARCEventType_to_libevent_type(flags), _parc_event_callback, parcEvent);
parcAssertNotNull(parcEvent->event, "Could not create a new event!");
parcEvent_LogDebug(parcEvent,
"parcEvent_Create(base=%p,fd=%x,events=%x,cb=%p,args=%p)\n",
parcEventScheduler_GetEvBase(parcEventScheduler), fd, flags, callback, parcEvent);
return parcEvent;
}
int
parcEvent_Start(PARCEvent *parcEvent)
{
parcEvent_LogDebug(parcEvent, "parcEvent_Start(%p)\n", parcEvent);
parcAssertNotNull(parcEvent, "parcEvent_Start must be passed a valid event!");
int result = event_add(parcEvent->event, NULL);
return result;
}
int
parcEvent_Stop(PARCEvent *parcEvent)
{
parcEvent_LogDebug(parcEvent, "parcEvent_Stop(%p)\n", parcEvent);
parcAssertNotNull(parcEvent, "parcEvent_Stop must be passed a valid event!");
int result = event_del(parcEvent->event);
return result;
}
int
parcEvent_Poll(PARCEvent *parcEvent, PARCEventType event)
{
parcEvent_LogDebug(parcEvent, "parcEvent_Stop(%p)\n", parcEvent);
parcAssertNotNull(parcEvent, "parcEvent_Stop must be passed a valid event!");
int result = event_pending(parcEvent->event, event, NULL);
return result;
}
void
parcEvent_Destroy(PARCEvent **parcEvent)
{
parcEvent_LogDebug((*parcEvent), "parcEvent_Destroy(%p)\n", *parcEvent);
parcAssertNotNull(*parcEvent, "parcEvent_Destroy must be passed a valid parcEvent!");
parcAssertNotNull((*parcEvent)->event, "parcEvent_Destroy passed a null event!");
event_free((*parcEvent)->event);
parcMemory_Deallocate((void **) parcEvent);
}
int
parcEvent_SetPriority(PARCEvent *parcEvent, PARCEventPriority priority)
{
parcEvent_LogDebug(parcEvent, "parcEvent_Stop(%p)\n", parcEvent);
return event_priority_set(parcEvent->event, internal_PARCEventPriority_to_libevent_priority(priority));
}
void
parcEvent_EnableDebug(void)
{
_parc_event_debug_enabled = 1;
}
void
parcEvent_DisableDebug(void)
{
_parc_event_debug_enabled = 0;
}
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