给我一个短进程优先调度算法C语言实现代码

在C语言中，我们可以使用简单的优先级队列（Priority Queue）数据结构，比如使用`struct priority_queue`和`pqsort`函数来实现短进程优先（Shortest Job First, SJF）调度算法。以下是一个简化的例子：

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

typedef struct Process {
    int pid;           // 进程ID
    int burst_time;    // 进程运行时间
} Process;

// 判断两个进程优先级
int compare(const void *a, const void *b) {
    Process *p1 = (Process *)a;
    Process *p2 = (Process *)b;
    return p1->burst_time - p2->burst_time;
}

// 创建优先级队列
void create_priority_queue(Process *processes, int num_processes) {
    qsort(processes, num_processes, sizeof(Process), compare);
}

// 简单的SJF调度
void sjf_scheduling(Process *processes, int num_processes) {
    Process current_process;
    for (int i = 0; i < num_processes; ++i) {
        current_process = processes[i];
        printf("Processing PID %d with burst time %d...\n", current_process.pid, current_process.burst_time);

        // 假设CPU可以立即响应并开始执行
        // 实际上这里可能需要睡眠current_process.burst_time秒
        sleep(current_process.burst_time);
    }
}

int main() {
    Process processes[5] = {
        {1, 4},
        {2, 2},
        {3, 6},
        {4, 3},
        {5, 8}
    };
    int num_processes = sizeof(processes) / sizeof(processes[0]);

    create_priority_queue(processes, num_processes);
    sjf_scheduling(processes, num_processes);

    return 0;
}