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add mutex_simple, semaphore_producer_consumer example. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@522 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2010-03-21 23:46:18 +00:00
parent b54960259e
commit e89bc7053e
4 changed files with 461 additions and 52 deletions
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2
examples/kernel/SConscript
View File

@ -17,6 +17,8 @@ semaphore_static.c
semaphore_dynamic.c
semaphore_priority.c
semaphore_buffer_worker.c
semaphore_producer_consumer.c
mutex_simple.c
heap_malloc.c
heap_realloc.c
""")

108
examples/kernel/mutex_simple.c Normal file
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@ -0,0 +1,108 @@
/*
* 程序清单：
*/
#include <rtthread.h>
#include "tc_comm.h"
/* 指向线程控制块的指针 */
static rt_thread_t tid1 = RT_NULL;
static rt_thread_t tid2 = RT_NULL;
static rt_thread_t tid3 = RT_NULL;
/* 线程1入口 */
static void thread1_entry(void* parameter)
{
while (1)
{
}
}
/* 线程2入口 */
static void thread2_entry(void* parameter)
{
while (1)
{
}
}
/* 线程3入口 */
static void thread3_entry(void* parameter)
{
while (1)
{
}
}
int mutex_simple_init()
{
/* 创建线程1 */
tid1 = rt_thread_create("t1",
thread1_entry, RT_NULL, /* 线程入口是thread1_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY - 1, THREAD_TIMESLICE);
if (tid1 != RT_NULL)
rt_thread_startup(tid1);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
/* 创建线程2 */
tid2 = rt_thread_create("t2",
thread2_entry, RT_NULL, /* 线程入口是thread2_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
if (tid2 != RT_NULL)
rt_thread_startup(tid2);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
/* 创建线程3 */
tid3 = rt_thread_create("t3",
thread3_entry, RT_NULL, /* 线程入口是thread3_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY + 1, THREAD_TIMESLICE);
if (tid3 != RT_NULL)
rt_thread_startup(tid3);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
return 0;
}
#ifdef RT_USING_TC
static void _tc_cleanup()
{
/* 调度器上锁，上锁后，将不再切换到其他线程，仅响应中断 */
rt_enter_critical();
/* 删除线程 */
if (tid1 != RT_NULL && tid1->stat != RT_THREAD_CLOSE)
rt_thread_delete(tid1);
if (tid2 != RT_NULL && tid2->stat != RT_THREAD_CLOSE)
rt_thread_delete(tid2);
if (tid3 != RT_NULL && tid3->stat != RT_THREAD_CLOSE)
rt_thread_delete(tid3);
/* 调度器解锁 */
rt_exit_critical();
/* 设置TestCase状态 */
tc_done(TC_STAT_PASSED);
}
int _tc_mutex_simple()
{
/* 设置TestCase清理回调函数 */
tc_cleanup(_tc_cleanup);
mutex_simple_init();
/* 返回TestCase运行的最长时间 */
return 100;
}
/* 输出函数命令到finsh shell中 */
FINSH_FUNCTION_EXPORT(_tc_mutex_simple, sime mutex example);
#else
/* 用户应用入口 */
int rt_application_init()
{
mutex_simple_init();
return 0;
}
#endif

249
examples/kernel/semaphore_buffer_worker.c
View File

@ -1,82 +1,217 @@
/*
* 程序清单：信号量实现生产者消费者间的互斥
*
* 在这个程序中，会创建两个线程，一个是生成者线程worker一个是消费者线程thread
*
* 在数据信息生产、消费的过程中，worker负责把数据将写入到环形buffer中，而thread
* 则从环形buffer中读出。
*/
#include <rtthread.h>
#include "tc_comm.h"
static rt_sem_t sem;
static rt_thread_t t1, worker;
#define BUFFER_SIZE 256
#define DATA_ITEM_SIZE 32
static rt_uint8_t working_buffer[BUFFER_SIZE];
static rt_uint16_t write_index, read_index;
static void thread1_entry(void* parameter)
/* 一个环形buffer的实现 */
struct rb
{
rt_err_t result;
rt_uint16_t next_index;
rt_uint8_t data[DATA_ITEM_SIZE];
rt_uint16_t read_index, write_index;
rt_uint8_t *buffer_ptr;
rt_uint16_t buffer_size;
};
/* 指向信号量控制块的指针 */
static rt_sem_t sem = RT_NULL;
/* 指向线程控制块的指针 */
static rt_thread_t tid = RT_NULL, worker = RT_NULL;
/* 环形buffer的内存块（用数组体现出来） */
#define BUFFER_SIZE 256
#define BUFFER_ITEM 32
static rt_uint8_t working_buffer[BUFFER_SIZE];
struct rb working_rb;
/* 初始化环形buffer，size指的是buffer的大小。注：这里并没对数据地址对齐做处理 */
static void rb_init(struct rb* rb, rt_uint8_t *pool, rt_uint16_t size)
{
RT_ASSERT(rb != RT_NULL);
/* 对读写指针清零*/
rb->read_index = rb->write_index = 0;
/* 设置环形buffer的内存数据块 */
rb->buffer_ptr = pool;
rb->buffer_size = size;
}
/* 向环形buffer中写入数据 */
static rt_bool_t rb_put(struct rb* rb, const rt_uint8_t *ptr, rt_uint16_t length)
{
rt_size_t size;
/* 判断是否有足够的剩余空间 */
if (rb->read_index > rb->write_index)
size = rb->read_index - rb->write_index;
else
size = rb->buffer_size - rb->write_index + rb->read_index;
/* 没有多余的空间 */
if (size < length) return RT_FALSE;
if (rb->read_index > rb->write_index)
{
/* read_index - write_index 即为总的空余空间 */
memcpy(&rb->buffer_ptr[rb->write_index], ptr, length);
rb->write_index += length;
}
else
{
if (rb->buffer_size - rb->write_index > length)
{
/* write_index 后面剩余的空间有足够的长度 */
memcpy(&rb->buffer_ptr[rb->write_index], ptr, length);
rb->write_index += length;
}
else
{
/*
* write_index 后面剩余的空间不存在足够的长度，需要把部分数据复制到
* 前面的剩余空间中
*/
memcpy(&rb->buffer_ptr[rb->write_index], ptr,
rb->buffer_size - rb->write_index);
memcpy(&rb->buffer_ptr[0], &ptr[rb->buffer_size - rb->write_index],
length - (rb->buffer_size - rb->write_index));
rb->write_index = length - (rb->buffer_size - rb->write_index);
}
}
return RT_TRUE;
}
/* 从环形buffer中读出数据 */
static rt_bool_t rb_get(struct rb* rb, rt_uint8_t *ptr, rt_uint16_t length)
{
rt_size_t size;
/* 判断是否有足够的数据 */
if (rb->read_index > rb->write_index)
size = rb->buffer_size - rb->read_index + rb->write_index;
else
size = rb->write_index - rb->read_index;
/* 没有足够的数据 */
if (size < length) return RT_FALSE;
if (rb->read_index > rb->write_index)
{
if (rb->buffer_size - rb->read_index > length)
{
/* read_index的数据足够多，直接复制 */
memcpy(ptr, &rb->buffer_ptr[rb->read_index], length);
rb->read_index += length;
}
else
{
/* read_index的数据不够，需要分段复制 */
memcpy(ptr, &rb->buffer_ptr[rb->read_index],
rb->buffer_size - rb->read_index);
memcpy(&ptr[rb->buffer_size - rb->read_index], &rb->buffer_ptr[0],
length - rb->buffer_size + rb->read_index);
rb->read_index = length - rb->buffer_size + rb->read_index;
}
}
else
{
/*
* read_index要比write_index小，总的数据量够（前面已经有总数据量的判
* 断），直接复制出数据。
*/
memcpy(ptr, &rb->buffer_ptr[rb->read_index], length);
rb->read_index += length;
}
return RT_TRUE;
}
/* 生产者线程入口 */
static void thread_entry(void* parameter)
{
rt_bool_t result;
rt_uint8_t data_buffer[BUFFER_ITEM];
while (1)
{
/* take a semaphore */
result = rt_sem_take(sem, RT_WAITING_FOREVER);
if (result != RT_EOK)
/* 持有信号量 */
rt_sem_take(sem, RT_WAITING_FOREVER);
/* 从环buffer中获得数据 */
result = rb_get(&working_rb, &data_buffer[0], BUFFER_ITEM);
/* 释放信号量 */
rt_sem_release(sem);
if (result == RT_TRUE)
{
tc_done(TC_STAT_FAILED);
return;
/* 获取数据成功，打印数据 */
rt_kprintf("%s\n", data_buffer);
}
/* read buffer */
/* release semaphore */
rt_sem_release(sem);
/* 做一个5 OS Tick的休眠 */
rt_thread_delay(5);
}
}
static void worker_thread_entry(void* parameter)
/* worker线程入口 */
static void worker_entry(void* parameter)
{
rt_err_t result;
rt_uint16_t next_index;
rt_uint8_t data[DATA_ITEM_SIZE];
rt_bool_t result;
rt_uint32_t index, setchar;
rt_uint8_t data_buffer[BUFFER_ITEM];
setchar = 0x21;
while (1)
{
/* take a semaphore */
result = rt_sem_take(sem, RT_WAITING_FOREVER);
if (result != RT_EOK)
/* 构造数据 */
for(index = 0; index < BUFFER_ITEM; index++)
{
tc_done(TC_STAT_FAILED);
return;
data_buffer[index] = setchar;
if (++setchar == 0x7f)
setchar = 0x21;
}
/* write buffer */
/* release semaphore */
/* 持有信号量 */
rt_sem_take(sem, RT_WAITING_FOREVER);
/* 把数据放到环形buffer中 */
result = rb_put(&working_rb, &data_buffer[0], BUFFER_ITEM);
/* 释放信号量 */
rt_sem_release(sem);
/* 放入成功，做一个10 OS Tick的休眠 */
rt_thread_delay(10);
}
}
int semaphore_buffer_worker_init()
{
sem = rt_sem_create("sem", 0, RT_IPC_FLAG_FIFO);
/* 初始化ring buffer */
rb_init(&working_rb, working_buffer, BUFFER_SIZE);
/* 创建信号量 */
sem = rt_sem_create("sem", 1, RT_IPC_FLAG_FIFO);
if (sem == RT_NULL)
{
tc_stat(TC_STAT_END | TC_STAT_FAILED);
return 0;
}
write_index = read_index = 0;
t1 = rt_thread_create("t1",
thread1_entry, RT_NULL,
THREAD_STACK_SIZE, THREAD_PRIORITY + 1, THREAD_TIMESLICE);
if (t1 != RT_NULL)
rt_thread_startup(t1);
/* 创建线程1 */
tid = rt_thread_create("thread",
thread_entry, RT_NULL, /* 线程入口是thread_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
if (tid != RT_NULL)
rt_thread_startup(tid);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
/* 创建线程2 */
worker = rt_thread_create("worker",
worker_thread_entry, RT_NULL,
worker_entry, RT_NULL, /* 线程入口是worker_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
if (worker != RT_NULL)
rt_thread_startup(worker);
@ -89,29 +224,39 @@ int semaphore_buffer_worker_init()
#ifdef RT_USING_TC
static void _tc_cleanup()
{
/* lock scheduler */
/* 调度器上锁，上锁后，将不再切换到其他线程，仅响应中断 */
rt_enter_critical();
/* delete t1, t2 and worker thread */
rt_thread_delete(t1);
rt_thread_delete(worker);
/* 删除信号量 */
if (sem != RT_NULL)
rt_sem_delete(sem);
tc_stat(TC_STAT_PASSED);
/* 删除线程 */
if (tid != RT_NULL && tid->stat != RT_THREAD_CLOSE)
rt_thread_delete(tid);
if (worker != RT_NULL && worker->stat != RT_THREAD_CLOSE)
rt_thread_delete(worker);
/* unlock scheduler */
/* 调度器解锁 */
rt_exit_critical();
/* 设置TestCase状态 */
tc_done(TC_STAT_PASSED);
}
int _tc_semaphore_buffer_worker()
{
/* set tc cleanup */
/* 设置TestCase清理回调函数 */
tc_cleanup(_tc_cleanup);
semaphore_buffer_worker_init();
return 50;
/* 返回TestCase运行的最长时间 */
return 100;
}
FINSH_FUNCTION_EXPORT(_tc_semaphore_buffer_worker, two threads working on a buffer example);
/* 输出函数命令到finsh shell中 */
FINSH_FUNCTION_EXPORT(_tc_semaphore_buffer_worker, a buffer worker with semaphore example);
#else
/* 用户应用入口 */
int rt_application_init()
{
semaphore_buffer_worker_init();

154
examples/kernel/semaphore_producer_consumer.c Normal file
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@ -0,0 +1,154 @@
/*
* 程序清单：生产者消费者例子
*
* 这个例子中将创建两个线程用于实现生产者消费者问题
*/
#include <rtthread.h>
#include "tc_comm.h"
/* 定义最大5个元素能够被产生 */
#define MAXSEM 5
/* 用于放置生产的整数数组 */
rt_uint32_t array[MAXSEM];
/* 指向生产者、消费者在array数组中的读写位置 */
static rt_uint32_t set, get;
/* 指向线程控制块的指针 */
static rt_thread_t producer_tid = RT_NULL;
static rt_thread_t consumer_tid = RT_NULL;
struct rt_semaphore sem_lock;
struct rt_semaphore sem_empty, sem_full;
/* 生成者线程入口 */
void producer_thread_entry(void* parameter)
{
int cnt = 0;
/* 运行100次 */
while( cnt < 100)
{
/* 获取一个空位 */
rt_sem_take(&sem_empty, RT_WAITING_FOREVER);
/* 修改array内容，上锁 */
rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
array[set%MAXSEM] = cnt + 1;
rt_kprintf("the producer generates a number: %d\n", array[set%MAXSEM]);
set++;
rt_sem_release(&sem_lock);
/* 发布一个满位 */
rt_sem_release(&sem_full);
cnt++;
/* 暂停一段时间 */
rt_thread_delay(50);
}
rt_kprintf("the producer exit!\n");
}
/* 消费者线程入口 */
void consumer_thread_entry(void* parameter)
{
rt_uint32_t no;
rt_uint32_t sum;
/* 第n个线程，由入口参数传进来 */
no = (rt_uint32_t)parameter;
while(1)
{
/* 获取一个满位 */
rt_sem_take(&sem_full, RT_WAITING_FOREVER);
/* 临界区，上锁进行操作 */
rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
sum += array[get%MAXSEM];
rt_kprintf("the consumer[%d] get a number: %d\n", no, array[get%MAXSEM] );
get++;
rt_sem_release(&sem_lock);
/* 释放一个空位 */
rt_sem_release(&sem_empty);
/* 生产者生产到100个数目，停止，消费者线程相应停止 */
if (get == 100) break;
/* 暂停一小会时间 */
rt_thread_delay(10);
}
rt_kprintf("the consumer[%d] sum is %d \n ", no, sum);
rt_kprintf("the consumer[%d] exit!\n");
}
int producer_consumer_init()
{
/* 初始化3个信号量 */
rt_sem_init(&sem_lock , "lock", 1, RT_IPC_FLAG_FIFO);
rt_sem_init(&sem_empty, "empty", MAXSEM, RT_IPC_FLAG_FIFO);
rt_sem_init(&sem_full , "full", 0, RT_IPC_FLAG_FIFO);
/* 创建线程1 */
producer_tid = rt_thread_create("producer",
producer_thread_entry, RT_NULL, /* 线程入口是producer_thread_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY - 1, THREAD_TIMESLICE);
if (producer_tid != RT_NULL)
rt_thread_startup(producer_tid);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
/* 创建线程2 */
consumer_tid = rt_thread_create("consumer",
consumer_thread_entry, RT_NULL, /* 线程入口是consumer_thread_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY + 1, THREAD_TIMESLICE);
if (consumer_tid != RT_NULL)
rt_thread_startup(consumer_tid);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
return 0;
}
#ifdef RT_USING_TC
static void _tc_cleanup()
{
/* 调度器上锁，上锁后，将不再切换到其他线程，仅响应中断 */
rt_enter_critical();
/* 删除线程 */
if (producer_tid != RT_NULL && producer_tid->stat != RT_THREAD_CLOSE)
rt_thread_delete(producer_tid);
if (consumer_tid != RT_NULL && consumer_tid->stat != RT_THREAD_CLOSE)
rt_thread_delete(consumer_tid);
/* 调度器解锁 */
rt_exit_critical();
/* 设置TestCase状态 */
tc_done(TC_STAT_PASSED);
}
int _tc_producer_consumer()
{
/* 设置TestCase清理回调函数 */
tc_cleanup(_tc_cleanup);
producer_consumer_init();
/* 返回TestCase运行的最长时间 */
return 100;
}
/* 输出函数命令到finsh shell中 */
FINSH_FUNCTION_EXPORT(_tc_producer_consumer, producer and consumer example);
#else
/* 用户应用入口 */
int rt_application_init()
{
producer_consumer_init();
return 0;
}
#endif