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/****************************************************************************
* examples/nxflat/tests/task/parent.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sched.h>
#include <semaphore.h>
#include <errno.h>
/****************************************************************************
* Private Data
****************************************************************************/
static char child_name[] = "child";
static char child_arg[] = "Hello from your parent!";
static sem_t g_sem;
/****************************************************************************
* Privite Functions
****************************************************************************/
int child_task(int argc, char **argv)
{
printf("Child: execv was successful!\n");
printf("Child: argc=%d\n", argc);
if (argc != 2)
{
printf("Child: expected argc to be 2\n");
printf("Child: Exit-ting with status=2\n");
exit(2);
}
printf("Child: argv[0]=\"%s\"\n", argv[0]);
if (strcmp(argv[0], child_name) != 0)
{
printf("Child: expected argv[0] to be \"%s\"\n", child_name);
printf("Child: Exit-ting with status=3\n");
exit(3);
}
printf("Child: argv[1]=\"%s\"\n", argv[1]);
if (strcmp(argv[1], child_arg) != 0)
{
printf("Child: expected argv[1] to be \"%s\"\n", child_arg);
printf("Child: Exit-ting with status=4\n");
exit(4);
}
printf("Child: Exit-ting with status=0\n");
sem_post(&g_sem);
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int main(int argc, char **argv)
{
pid_t parent_pid = getpid();
char *child_argv[2];
int ret;
printf("Parent: Started, pid=%d\n", parent_pid);
sem_init(&g_sem, 0, 0);
printf("Parent: Calling task_create()\n");
child_argv[0] = child_arg;
child_argv[1] = 0;
ret = task_create(child_name, 50, 512, child_task, (char**)child_argv);
if (ret != 0)
{
printf("Parent: task_create failed: %d\n", errno);
}
printf("Parent: Waiting for child\n");
sem_wait(&g_sem);
printf("Parent: Exiting\n");
sem_destroy(&g_sem);
return 0;
}
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