160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/*
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* 程序清单：生产者消费者例子
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*
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* 这个例子中将创建两个线程用于实现生产者消费者问题
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*/
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#include <rtthread.h>
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#include "tc_comm.h"
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/* 定义最大5个元素能够被产生 */
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#define MAXSEM 5
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/* 用于放置生产的整数数组 */
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rt_uint32_t array[MAXSEM];
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/* 指向生产者、消费者在array数组中的读写位置 */
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static rt_uint32_t set, get;
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/* 指向线程控制块的指针 */
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static rt_thread_t producer_tid = RT_NULL;
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static rt_thread_t consumer_tid = RT_NULL;
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struct rt_semaphore sem_lock;
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struct rt_semaphore sem_empty, sem_full;
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/* 生成者线程入口 */
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void producer_thread_entry(void* parameter)
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{
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int cnt = 0;
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/* 运行100次 */
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while( cnt < 100)
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{
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/* 获取一个空位 */
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rt_sem_take(&sem_empty, RT_WAITING_FOREVER);
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/* 修改array内容，上锁 */
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rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
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array[set%MAXSEM] = cnt + 1;
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rt_kprintf("the producer generates a number: %d\n", array[set%MAXSEM]);
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set++;
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rt_sem_release(&sem_lock);
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/* 发布一个满位 */
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rt_sem_release(&sem_full);
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cnt++;
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/* 暂停一段时间 */
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rt_thread_delay(50);
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}
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rt_kprintf("the producer exit!\n");
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}
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/* 消费者线程入口 */
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void consumer_thread_entry(void* parameter)
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{
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rt_uint32_t no;
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rt_uint32_t sum;
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/* 第n个线程，由入口参数传进来 */
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no = (rt_uint32_t)parameter;
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sum = 0;
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while(1)
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{
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/* 获取一个满位 */
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rt_sem_take(&sem_full, RT_WAITING_FOREVER);
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/* 临界区，上锁进行操作 */
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rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
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sum += array[get%MAXSEM];
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rt_kprintf("the consumer[%d] get a number: %d\n", no, array[get%MAXSEM] );
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get++;
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rt_sem_release(&sem_lock);
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/* 释放一个空位 */
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rt_sem_release(&sem_empty);
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/* 生产者生产到100个数目，停止，消费者线程相应停止 */
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if (get == 100) break;
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/* 暂停一小会时间 */
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rt_thread_delay(10);
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}
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rt_kprintf("the consumer[%d] sum is %d \n ", no, sum);
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rt_kprintf("the consumer[%d] exit!\n");
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}
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int semaphore_producer_consumer_init()
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{
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/* 初始化3个信号量 */
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rt_sem_init(&sem_lock , "lock", 1, RT_IPC_FLAG_FIFO);
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rt_sem_init(&sem_empty, "empty", MAXSEM, RT_IPC_FLAG_FIFO);
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rt_sem_init(&sem_full , "full", 0, RT_IPC_FLAG_FIFO);
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/* 创建线程1 */
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producer_tid = rt_thread_create("producer",
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producer_thread_entry, RT_NULL, /* 线程入口是producer_thread_entry, 入口参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY - 1, THREAD_TIMESLICE);
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if (producer_tid != RT_NULL)
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rt_thread_startup(producer_tid);
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else
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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/* 创建线程2 */
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consumer_tid = rt_thread_create("consumer",
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consumer_thread_entry, RT_NULL, /* 线程入口是consumer_thread_entry, 入口参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY + 1, THREAD_TIMESLICE);
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if (consumer_tid != RT_NULL)
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rt_thread_startup(consumer_tid);
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else
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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return 0;
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}
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#ifdef RT_USING_TC
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static void _tc_cleanup()
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{
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/* 调度器上锁，上锁后，将不再切换到其他线程，仅响应中断 */
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rt_enter_critical();
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rt_sem_detach(&sem_lock);
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rt_sem_detach(&sem_empty);
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rt_sem_detach(&sem_full);
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/* 删除线程 */
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if (producer_tid != RT_NULL && producer_tid->stat != RT_THREAD_CLOSE)
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rt_thread_delete(producer_tid);
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if (consumer_tid != RT_NULL && consumer_tid->stat != RT_THREAD_CLOSE)
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rt_thread_delete(consumer_tid);
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/* 调度器解锁 */
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rt_exit_critical();
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/* 设置TestCase状态 */
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tc_done(TC_STAT_PASSED);
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}
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int _tc_semaphore_producer_consumer()
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{
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/* 设置TestCase清理回调函数 */
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tc_cleanup(_tc_cleanup);
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semaphore_producer_consumer_init();
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/* 返回TestCase运行的最长时间 */
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return 100;
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}
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/* 输出函数命令到finsh shell中 */
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FINSH_FUNCTION_EXPORT(_tc_semaphore_producer_consumer, producer and consumer example);
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#else
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/* 用户应用入口 */
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int rt_application_init()
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{
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semaphore_producer_consumer_init();
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return 0;
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}
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#endif
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