signal_sample.c

/* * Copyright (c) 2006-2018, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2018-08-24 yangjie the first version *//* * 程序清单：信号例程 * * 这个例子会创建一个线程，线程安装信号，然后给这个线程发送信号。 * */#include <rtthread.h>#define THREAD_PRIORITY 25#define THREAD_STACK_SIZE 512#define THREAD_TIMESLICE 5static rt_thread_t tid1 = RT_NULL;/* 线程1的信号处理函数 */void thread1_signal_handler(int sig){ rt_kprintf("thread1 received signal %d\n", sig);}/* 线程1的入口函数 */static void thread1_entry(void *parameter){ int cnt = 0; /* 安装信号 */ rt_signal_install(SIGUSR1, thread1_signal_handler); rt_signal_unmask(SIGUSR1); /* 运行10次 */ while (cnt < 10) { /* 线程1采用低优先级运行，一直打印计数值 */ rt_kprintf("thread1 count : %d\n", cnt); cnt++; rt_thread_mdelay(100); }}/* 信号示例的初始化 */int signal_sample(void){ /* 创建线程1 */ tid1 = rt_thread_create("thread1", thread1_entry, RT_NULL, THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE); if (tid1 != RT_NULL) rt_thread_startup(tid1); rt_thread_mdelay(300); /* 发送信号 SIGUSR1 给线程1 */ rt_thread_kill(tid1, SIGUSR1); return 0;}/* 导出到 msh 命令列表中 */MSH_CMD_EXPORT(signal_sample, signal sample);