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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 <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <sys/socket.h>
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include <LongBow/runtime.h>
#include <parc/algol/parc_Memory.h>
#include "rta_Framework.h"
#include "rta_ConnectionTable.h"
#include "rta_Framework_Commands.h"
#ifndef DEBUG_OUTPUT
#define DEBUG_OUTPUT 0
#endif
// the thread function
static void *_rtaFramework_Run(void *ctx);
/**
* Starts the worker thread. Blocks until started
*
* Example:
* @code
* <#example#>
* @endcode
*/
void
rtaFramework_Start(RtaFramework *framework)
{
pthread_attr_t attr;
// ensure we're in the INIT state, then bump to STARTING
// %%% LOCK
rta_Framework_LockStatus(framework);
if (framework->status == FRAMEWORK_INIT) {
framework->status = FRAMEWORK_STARTING;
rta_Framework_BroadcastStatus(framework);
rta_Framework_UnlockStatus(framework);
// %%% UNLOCK
} else {
RtaFrameworkStatus status = framework->status;
rta_Framework_UnlockStatus(framework);
// %%% UNLOCK
assertTrue(0, "Invalid state, not FRAMEWORK_INIT, got %d", status);
return;
}
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
if (pthread_create(&framework->thread, &attr, _rtaFramework_Run, framework) != 0) {
perror("pthread_create");
exit(EXIT_FAILURE);
}
if (DEBUG_OUTPUT) {
printf("%s framework started %p\n", __func__, (void *) framework);
}
// wait for notificaiton from event thread
rta_Framework_LockStatus(framework);
while (framework->status == FRAMEWORK_INIT) {
rta_Framework_WaitStatus(framework);
}
rta_Framework_UnlockStatus(framework);
if (DEBUG_OUTPUT) {
printf("%s framework running %p\n", __func__, (void *) framework);
}
}
static void *
_rtaFramework_Run(void *ctx)
{
RtaFramework *framework = (RtaFramework *) ctx;
// %%% LOCK
rta_Framework_LockStatus(framework);
if (framework->status != FRAMEWORK_STARTING) {
assertTrue(0, "Invalid state, expected before %d, got %d", FRAMEWORK_STARTING, framework->status);
rta_Framework_UnlockStatus(framework);
// %%% UNLOCK
pthread_exit(NULL);
}
framework->status = FRAMEWORK_RUNNING;
// Set our thread name, only used to diagnose a crash or in debugging
#if __APPLE__
pthread_setname_np("RTA Framework");
#else
pthread_setname_np(framework->thread, "RTA Framework");
#endif
rta_Framework_BroadcastStatus(framework);
rta_Framework_UnlockStatus(framework);
// %%% UNLOCK
if (DEBUG_OUTPUT) {
const int bufferLength = 1024;
char frameworkName[bufferLength];
pthread_getname_np(framework->thread, frameworkName, bufferLength);
printf("Framework thread running: '%s'\n", frameworkName);
}
// blocks
parcEventScheduler_Start(framework->base, PARCEventSchedulerDispatchType_Blocking);
if (DEBUG_OUTPUT) {
printf("%9" PRIu64 " %s existed parcEventScheduler_Start\n", framework->clock_ticks, __func__);
}
// %%% LOCK
rta_Framework_LockStatus(framework);
framework->status = FRAMEWORK_SHUTDOWN;
rta_Framework_BroadcastStatus(framework);
rta_Framework_UnlockStatus(framework);
// %%% UNLOCK
pthread_exit(NULL);
}
/**
* Stops the worker thread by sending a CommandShutdown.
* Blocks until shutdown complete.
*
* CALLED FROM API's THREAD
*
* Example:
* @code
* <#example#>
* @endcode
*/
void
rtaFramework_Shutdown(RtaFramework *framework)
{
RtaCommand *shutdown = rtaCommand_CreateShutdownFramework();
rtaCommand_Write(shutdown, framework->commandRingBuffer);
parcNotifier_Notify(framework->commandNotifier);
rtaCommand_Release(&shutdown);
// now block on reading status
rtaFramework_WaitForStatus(framework, FRAMEWORK_SHUTDOWN);
}
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