nuttx-apps/testing/ostest/barrier.c

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/****************************************************************************
* apps/testing/ostest/barrier.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <assert.h>
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include "ostest.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define HALF_SECOND 500000L
/****************************************************************************
* Private Data
****************************************************************************/
static pthread_barrier_t barrier;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: barrier_func
****************************************************************************/
static void *barrier_func(void *parameter)
{
int id = (int)((intptr_t)parameter);
int status;
printf("barrier_func: Thread %d started\n", id);
usleep(HALF_SECOND);
/* Wait at the barrier until all threads are synchronized. */
printf("barrier_func: Thread %d calling pthread_barrier_wait()\n",
id);
FFLUSH();
status = pthread_barrier_wait(&barrier);
if (status == 0)
{
printf("barrier_func: Thread %d, back with "
"status=0 (I am not special)\n",
id);
}
else if (status == PTHREAD_BARRIER_SERIAL_THREAD)
{
printf("barrier_func: Thread %d, back with "
"status=PTHREAD_BARRIER_SERIAL_THREAD (I AM SPECIAL)\n",
id);
}
else
{
printf("barrier_func: ERROR thread %d could not get semaphore value\n",
id);
ASSERT(false);
}
FFLUSH();
usleep(HALF_SECOND);
printf("barrier_func: Thread %d done\n", id);
FFLUSH();
return NULL;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: barrier_test
****************************************************************************/
void barrier_test(void)
{
pthread_t barrier_thread[CONFIG_TESTING_OSTEST_NBARRIER_THREADS];
pthread_addr_t result;
pthread_attr_t attr;
pthread_barrierattr_t barrierattr;
int status;
int i;
printf("barrier_test: Initializing barrier\n");
/* Create the barrier */
status = pthread_barrierattr_init(&barrierattr);
if (status != OK)
{
printf("barrier_test: pthread_barrierattr_init failed, status=%d\n",
status);
}
status = pthread_barrier_init(&barrier, &barrierattr,
CONFIG_TESTING_OSTEST_NBARRIER_THREADS);
if (status != OK)
{
printf("barrier_test: pthread_barrier_init failed, status=%d\n",
status);
}
/* Start CONFIG_TESTING_OSTEST_NBARRIER_THREADS thread instances */
status = pthread_attr_init(&attr);
if (status != OK)
{
printf("barrier_test: pthread_attr_init failed, status=%d\n",
status);
}
for (i = 0; i < CONFIG_TESTING_OSTEST_NBARRIER_THREADS; i++)
{
status = pthread_create(&barrier_thread[i], &attr, barrier_func,
(pthread_addr_t)((uintptr_t)i));
if (status != 0)
{
printf("barrier_test: ERROR thread %d create, status=%d\n",
i, status);
printf("barrier_test: Test aborted with waiting threads\n");
ASSERT(false);
goto abort_test;
}
else
{
printf("barrier_test: Thread %d created\n", i);
}
}
FFLUSH();
/* Wait for all thread instances to complete */
for (i = 0; i < CONFIG_TESTING_OSTEST_NBARRIER_THREADS; i++)
{
status = pthread_join(barrier_thread[i], &result);
if (status != 0)
{
printf("barrier_test: ERROR thread %d join, status=%d\n",
i, status);
ASSERT(false);
}
else
{
printf("barrier_test: Thread %d completed with result=%p\n",
i, result);
}
}
/* Destroy the barrier */
abort_test:
status = pthread_barrier_destroy(&barrier);
if (status != OK)
{
printf("barrier_test: pthread_barrier_destroy failed, status=%d\n",
status);
}
status = pthread_barrierattr_destroy(&barrierattr);
if (status != OK)
{
printf("barrier_test: pthread_barrierattr_destroy failed, status=%d\n",
status);
}
FFLUSH();
}