c语言实现任务调度器

void main()
{
 while(1)
 {
  task1();
  task2();
  ...
 }
}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//        头文件区
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include <stdio.h>
#include "scheduler.h"

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//        接口定义区
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#define MAX_TASKS 10
static volatile unsigned char cur_task_num = 0;

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//        变量定义区
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
static running_queue_def running_queue[MAX_TASKS] = {0};

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//        函数定义区
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
int create_task(const void (*fun)(), unsigned short period)
{
    unsigned char i;

 if(cur_task_num >= MAX_TASKS)
 {
  printf("over limit max_tasks\n");
  return -1;
 }
    running_queue[i].fun = fun;
    running_queue[i].period = period;
    running_queue[i].cnt = 0;
    
    cur_task_num++;
    return 0;
}

int scheduler_run()
{
    unsigned char i;
    for(i = 0; i < cur_task_num; i++)
    {
        if(running_queue[i].cnt > 0)
        {
            running_queue[i].cnt--;
        }
        else
        {
            running_queue[i].cnt = running_queue[i].period;
            running_queue[i].fun();
        }
    }

    return 0;
}

#ifndef __SCHEDULER_H
#define __SCHEDULER_H

typedef struct {
     void (*fun)();        //运行函数
     unsigned short period;//周期
        unsigned short cnt;
}running_queue_def;

int create_task(const void (*fun)(), unsigned short period);
int scheduler_run();

#endif

#include "scheduler.h"
#include <unistd.h>
#include <stdio.h>

void task1()
{
    printf("task1 run\n");
}

void task2()
{
    printf("task2 run\n");
}

int main()
{
    create_task(task1, 1000);
    create_task(task2, 2000);
    while(1)
    {
        scheduler_run();
        usleep(1000);
    }

    return 0;
}

echo "delet main"
rm -rf main
sleep 1

gcc main.c scheduler.c -o main  -w

echo "build ok "
./main