181 lines
5.5 KiB
C
181 lines
5.5 KiB
C
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/****************************************************************************
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* examples/watched/watched_main.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include "watched.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: Task that feeds the dog
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****************************************************************************/
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static int task1(int argc, FAR char *argv[])
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{
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struct watched_info_s watched_info;
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/* Get the necessary information from watcher */
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watched_read_watcher_info(&watched_info);
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watched_subscribe(&watched_info);
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for (; ; )
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{
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feed_dog(&watched_info);
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sleep(3);
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}
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return OK;
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}
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/****************************************************************************
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* Name: Task that doesn't feed the dog
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****************************************************************************/
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static int task2(int argc, FAR char *argv[])
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{
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int counter = 0;
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struct watched_info_s watched_info;
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/* Get the necessary information from watcher */
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watched_read_watcher_info(&watched_info);
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watched_subscribe(&watched_info);
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for (; ; )
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{
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sleep((CONFIG_EXAMPLES_WATCHER_TIMEOUT) / 1000);
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counter++;
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if (counter == 5)
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{
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watched_unsubscribe(&watched_info);
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}
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}
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return OK;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: null_main
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****************************************************************************/
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int main(int argc, char *argv[])
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{
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int ret = OK;
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/* Check if the watcher has already been initialized */
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if (!watched_is_watcher_on())
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{
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printf("Please, enable the watcher service \
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before subscribing tasks!\n");
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ret = ENOENT;
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goto errout;
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}
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printf("Starting watched tasks\n");
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/* Starting Tasks Tasks 1 and 4 will subscribe, but they will not feed the
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* dog. Tasks 2 and 3 will subscribe and will feed the dog each 3 secs.
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*/
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printf("Creating Watched Task 1 - It will not feed the dog\n");
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ret = task_create("Watched Task 1", CONFIG_EXAMPLES_WATCHED_PRIORITY,
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CONFIG_EXAMPLES_WATCHED_STACKSIZE, task2, NULL);
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if (ret < 0)
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{
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int errcode = errno;
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printf("watched_main: ERROR: Failed to start Watched Task 1: %d\n",
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errcode);
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ret = errcode;
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goto errout;
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}
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printf("Creating Watched Task 2 - It will feed the dog\n");
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ret = task_create("Watched Task 2", CONFIG_EXAMPLES_WATCHED_PRIORITY,
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CONFIG_EXAMPLES_WATCHED_STACKSIZE, task1, NULL);
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if (ret < 0)
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{
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int errcode = errno;
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printf("watched_main: ERROR: Failed to start Watched Task 2: %d\n",
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errcode);
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ret = errcode;
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goto errout;
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}
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printf("Creating Watched Task 3 - It will feed the dog\n");
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ret = task_create("Watched Task 3", CONFIG_EXAMPLES_WATCHED_PRIORITY,
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CONFIG_EXAMPLES_WATCHED_STACKSIZE, task1, NULL);
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if (ret < 0)
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{
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int errcode = errno;
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printf("watched_main: ERROR: Failed to start Watched Task 3: %d\n",
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errcode);
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ret = errcode;
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goto errout;
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}
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printf("Creating Watched Task 4 - It will not feed the dog\n");
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ret = task_create("Watched Task 4", CONFIG_EXAMPLES_WATCHED_PRIORITY,
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CONFIG_EXAMPLES_WATCHED_STACKSIZE, task2, NULL);
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if (ret < 0)
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{
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int errcode = errno;
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printf("watched_main: ERROR: Failed to start Watched Task 4: %d\n",
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errcode);
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ret = errcode;
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goto errout;
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}
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errout:
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return ret;
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}
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