xiaoxiang781216 commented on code in PR #20782: URL: https://github.com/apache/nuttx/pull/20782#discussion_r4356626410
########## drivers/timers/taskwdt.c: ########## @@ -0,0 +1,436 @@ +/**************************************************************************** + * drivers/timers/taskwdt.c + * + * SPDX-License-Identifier: Apache-2.0 + * + * 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 <nuttx/config.h> + +#include <sys/types.h> +#include <stdint.h> +#include <stdbool.h> +#include <string.h> +#include <fcntl.h> +#include <assert.h> +#include <errno.h> +#include <nuttx/debug.h> + +#include <nuttx/clock.h> +#include <nuttx/fs/fs.h> +#include <nuttx/kmalloc.h> +#include <nuttx/list.h> +#include <nuttx/mutex.h> +#include <nuttx/sched.h> +#include <nuttx/wqueue.h> +#include <nuttx/timers/taskwdt.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +#define TASKWDT_INTERVAL_TICK MSEC2TICK(CONFIG_TASKWDT_INTERVAL) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/* A channel is the state behind one open() of the device */ + +struct taskwdt_chan_s +{ + struct list_node node; /* Entry in taskwdt_s.chans */ + pid_t pid; /* Task that opened it */ + char name[CONFIG_TASK_NAME_SIZE + 1]; /* Its name */ + clock_t timeout; /* Timeout in ticks */ + clock_t deadline; /* Tick the channel expires */ + bool armed; /* Is the channel supervised */ +}; + +struct taskwdt_s +{ + struct file wdt; /* The hardware watchdog */ + struct work_s work; /* Checks the channels, feeds the hardware */ + struct list_node chans; /* All the channels (struct taskwdt_chan_s) */ + mutex_t lock; /* Protects everything above and below */ + bool started; /* The hardware watchdog is armed */ +}; + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static int taskwdt_open(FAR struct file *filep); Review Comment: the plan is great! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
