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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 <LongBow/runtime.h>
#include <stdio.h>
#include <unistd.h>
#include "internal_parc_Event.h"
#include <parc/algol/parc_EventScheduler.h>
#include <parc/algol/parc_FileOutputStream.h>
#include <parc/logging/parc_Log.h>
#include <parc/logging/parc_LogReporterFile.h>
/**
* Current implementation based on top of libevent2
*/
#include <event2/event.h>
static int _parc_event_scheduler_debug_enabled = 0;
#define parcEventScheduler_LogDebug(parcEventScheduler, ...) \
if (_parc_event_scheduler_debug_enabled) \
parcLog_Debug(parcEventScheduler->log, __VA_ARGS__)
struct PARCEventScheduler {
/**
* Base of the libevent manager.
*/
struct event_base *evbase;
PARCLog *log;
};
static PARCLog *
_parc_logger_create(void)
{
PARCFileOutputStream *fileOutput = parcFileOutputStream_Create(dup(STDOUT_FILENO));
PARCOutputStream *output = parcFileOutputStream_AsOutputStream(fileOutput);
parcFileOutputStream_Release(&fileOutput);
PARCLogReporter *reporter = parcLogReporterFile_Create(output);
parcOutputStream_Release(&output);
PARCLog *log = parcLog_Create("localhost", "test_parc_Log", NULL, reporter);
parcLogReporter_Release(&reporter);
parcLog_SetLevel(log, PARCLogLevel_All);
return log;
}
void *
parcEventScheduler_GetEvBase(PARCEventScheduler *parcEventScheduler)
{
return (void *) parcEventScheduler->evbase;
}
PARCEventScheduler *
parcEventScheduler_Create(void)
{
internal_parc_initializeLibevent();
PARCEventScheduler *parcEventScheduler = parcMemory_Allocate(sizeof(PARCEventScheduler));
assertNotNull(parcEventScheduler, "parcMemory_Allocate(%zu) returned NULL", sizeof(PARCEventScheduler));
// Initialize libevent base pointer.
parcEventScheduler->evbase = event_base_new();
assertNotNull(parcEventScheduler->evbase, "Could not obtain an event base!");
int result = event_base_priority_init(parcEventScheduler->evbase, PARCEventPriority_NumberOfPriorities);
assertTrue(result == 0, "Could not set scheduler priorities (%d)", result);
parcEventScheduler->log = _parc_logger_create();
assertNotNull(parcEventScheduler->log, "Could not create parc logger");
parcEventScheduler_LogDebug(parcEventScheduler, "parcEventScheduler_Create() = %p\n", parcEventScheduler);
return parcEventScheduler;
}
int
parcEventScheduler_Start(PARCEventScheduler *parcEventScheduler, PARCEventSchedulerDispatchType type)
{
parcEventScheduler_LogDebug(parcEventScheduler, "parcEventScheduler_Start(%p, %d)\n", parcEventScheduler, type);
assertNotNull(parcEventScheduler, "parcEventScheduler_Start must be passed a valid base parcEventScheduler!");
int result = event_base_loop(parcEventScheduler->evbase,
internal_PARCEventSchedulerDispatchType_to_eventloop_options(type));
return result;
}
int
parcEventScheduler_DispatchBlocking(PARCEventScheduler *parcEventScheduler)
{
return parcEventScheduler_Start(parcEventScheduler, PARCEventSchedulerDispatchType_Blocking);
}
int
parcEventScheduler_DispatchNonBlocking(PARCEventScheduler *parcEventScheduler)
{
return parcEventScheduler_Start(parcEventScheduler, PARCEventSchedulerDispatchType_NonBlocking);
}
int
parcEventScheduler_Stop(PARCEventScheduler *parcEventScheduler, struct timeval *delay)
{
parcEventScheduler_LogDebug(parcEventScheduler, "parcEventScheduler_Stop(%p, %p)\n", parcEventScheduler, delay);
assertNotNull(parcEventScheduler, "parcEventScheduler_Stop must be passed a valid base parcEventScheduler!");
int result = event_base_loopexit(parcEventScheduler->evbase, delay);
return result;
}
int
parcEventScheduler_Abort(PARCEventScheduler *parcEventScheduler)
{
parcEventScheduler_LogDebug(parcEventScheduler, "parcEventScheduler_Abort(%p)\n", parcEventScheduler);
assertNotNull(parcEventScheduler, "parcEventScheduler_Abort must be passed a valid base parcEventScheduler!");
int result = event_base_loopbreak(parcEventScheduler->evbase);
return result;
}
static int _event_enable_debug_mode_called = 0;
void
parcEventScheduler_EnableDebug(void)
{
_parc_event_scheduler_debug_enabled = 1;
if (_event_enable_debug_mode_called == 0) {
event_enable_debug_mode();
_event_enable_debug_mode_called = 1;
}
}
void
parcEventScheduler_DisableDebug(void)
{
_parc_event_scheduler_debug_enabled = 0;
}
void
parcEventScheduler_Destroy(PARCEventScheduler **parcEventScheduler)
{
parcEventScheduler_LogDebug((*parcEventScheduler), "parcEventScheduler_Destroy(%p)\n", *parcEventScheduler);
assertNotNull(*parcEventScheduler, "parcEventScheduler_Destroy must be passed a valid base parcEventScheduler!");
assertNotNull((*parcEventScheduler)->evbase, "parcEventScheduler_Destroy passed a NULL event base member!");
event_base_free((*parcEventScheduler)->evbase);
parcLog_Release(&((*parcEventScheduler)->log));
parcMemory_Deallocate((void **) parcEventScheduler);
}
PARCLog *
parcEventScheduler_GetLogger(PARCEventScheduler *parcEventScheduler)
{
return parcEventScheduler->log;
}
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