142 lines
3.0 KiB
C
142 lines
3.0 KiB
C
/*
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* 程序清单：内存池例程
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*
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* 这个程序会创建一个静态的内存池对象，2个动态线程。两个线程会试图分别从内存池中获得
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* 内存块
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*/
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#include <rtthread.h>
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#include "tc_comm.h"
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static rt_uint8_t *ptr[48];
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static rt_uint8_t mempool[4096];
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static struct rt_mempool mp;
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/* 指向线程控制块的指针 */
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static rt_thread_t tid1 = RT_NULL;
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static rt_thread_t tid2 = RT_NULL;
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/* 线程1入口 */
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static void thread1_entry(void* parameter)
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{
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int i;
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char *block;
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while(1)
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{
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for (i = 0; i < 48; i++)
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{
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/* 申请内存块 */
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rt_kprintf("allocate No.%d\n", i);
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if (ptr[i] == RT_NULL)
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{
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ptr[i] = rt_mp_alloc(&mp, RT_WAITING_FOREVER);
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}
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}
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/* 继续申请一个内存块，因为已经没有内存块，线程应该被挂起 */
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block = rt_mp_alloc(&mp, RT_WAITING_FOREVER);
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rt_kprintf("allocate the block mem\n");
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/* 释放这个内存块 */
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rt_mp_free(block);
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block = RT_NULL;
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}
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}
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/* 线程2入口，线程2的优先级比线程1低，应该线程1先获得执行。*/
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static void thread2_entry(void *parameter)
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{
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int i;
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while(1)
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{
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rt_kprintf("try to release block\n");
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for (i = 0 ; i < 48; i ++)
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{
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/* 释放所有分配成功的内存块 */
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if (ptr[i] != RT_NULL)
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{
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rt_kprintf("release block %d\n", i);
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rt_mp_free(ptr[i]);
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ptr[i] = RT_NULL;
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}
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}
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/* 休眠10个OS Tick */
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rt_thread_delay(10);
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}
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}
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int mempool_simple_init()
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{
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int i;
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for (i = 0; i < 48; i ++) ptr[i] = RT_NULL;
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/* 初始化内存池对象 */
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rt_mp_init(&mp, "mp1", &mempool[0], sizeof(mempool), 80);
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/* 创建线程1 */
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tid1 = rt_thread_create("t1",
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thread1_entry, RT_NULL, /* 线程入口是thread1_entry, 入口参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
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if (tid1 != RT_NULL)
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rt_thread_startup(tid1);
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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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tid2 = rt_thread_create("t2",
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thread2_entry, RT_NULL, /* 线程入口是thread2_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 (tid2 != RT_NULL)
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rt_thread_startup(tid2);
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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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/* 删除线程 */
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if (tid1 != RT_NULL && tid1->stat != RT_THREAD_CLOSE)
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rt_thread_delete(tid1);
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if (tid2 != RT_NULL && tid2->stat != RT_THREAD_CLOSE)
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rt_thread_delete(tid2);
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/* 执行内存池脱离 */
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rt_mp_detach(&mp);
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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_mempool_simple()
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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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mempool_simple_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_mempool_simple, a memory pool 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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mempool_simple_init();
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return 0;
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}
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#endif
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