请根据上述进程组设计其进程组调度函数接口，依然Rust实现

以下是一个简单的进程组调度函数接口的 Rust 实现：

use std::collections::HashMap;
use std::sync::{Arc, Mutex};

// 定义进程状态类型
enum ProcessState {
    Running,
    Paused,
    Stopped,
}

// 定义进程结构体
struct Process {
    id: u32,
    state: ProcessState,
    // 进程所占用的 CPU 时间
    cpu_time: u32,
    // 进程优先级
    priority: u32,
}

// 定义进程组结构体
struct ProcessGroup {
    // 进程组 ID
    id: u32,
    // 进程列表
    processes: Vec<Process>,
    // 进程组状态
    state: ProcessState,
    // 进程组优先级
    priority: u32,
}

// 定义进程组调度器结构体
struct Scheduler {
    // 进程组列表
    process_groups: Arc<Mutex<HashMap<u32, ProcessGroup>>>,
}

impl Scheduler {
    // 创建一个新的进程组
    fn create_process_group(&self, id: u32) {
        let mut process_groups = self.process_groups.lock().unwrap();
        if process_groups.contains_key(&id) {
            panic!("Process group with ID {} already exists", id);
        }
        process_groups.insert(
            id,
            ProcessGroup {
                id,
                processes: vec![],
                state: ProcessState::Stopped,
                priority: 0,
            },
        );
    }

    // 删除一个进程组
    fn delete_process_group(&self, id: u32) {
        let mut process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&id) {
            panic!("Process group with ID {} does not exist", id);
        }
        process_groups.remove(&id);
    }

    // 启动一个进程组
    fn start_process_group(&self, id: u32) {
        let mut process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&id) {
            panic!("Process group with ID {} does not exist", id);
        }
        let process_group = process_groups.get_mut(&id).unwrap();
        process_group.state = ProcessState::Running;
    }

    // 暂停一个进程组
    fn pause_process_group(&self, id: u32) {
        let mut process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&id) {
            panic!("Process group with ID {} does not exist", id);
        }
        let process_group = process_groups.get_mut(&id).unwrap();
        process_group.state = ProcessState::Paused;
    }

    // 停止一个进程组
    fn stop_process_group(&self, id: u32) {
        let mut process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&id) {
            panic!("Process group with ID {} does not exist", id);
        }
        let process_group = process_groups.get_mut(&id).unwrap();
        process_group.state = ProcessState::Stopped;
    }

    // 添加一个进程到一个进程组
    fn add_process(&self, group_id: u32, process: Process) {
        let mut process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&group_id) {
            panic!("Process group with ID {} does not exist", group_id);
        }
        let process_group = process_groups.get_mut(&group_id).unwrap();
        process_group.processes.push(process);
    }

    // 从一个进程组中移除一个进程
    fn remove_process(&self, group_id: u32, process_id: u32) {
        let mut process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&group_id) {
            panic!("Process group with ID {} does not exist", group_id);
        }
        let process_group = process_groups.get_mut(&group_id).unwrap();
        let index = process_group
            .processes
            .iter()
            .position(|process| process.id == process_id)
            .unwrap();
        process_group.processes.remove(index);
    }

    // 获取所有进程组的状态
    fn get_process_groups_state(&self) -> HashMap<u32, ProcessState> {
        let process_groups = self.process_groups.lock().unwrap();
        let mut state_map = HashMap::new();
        for (id, process_group) in process_groups.iter() {
            state_map.insert(*id, process_group.state);
        }
        state_map
    }

    // 获取一个进程组的状态
    fn get_process_group_state(&self, id: u32) -> ProcessState {
        let process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&id) {
            panic!("Process group with ID {} does not exist", id);
        }
        process_groups.get(&id).unwrap().state
    }

    // 获取一个进程的状态
    fn get_process_state(&self, group_id: u32, process_id: u32) -> ProcessState {
        let process_groups = self.process_groups.lock().unwrap();
        if !process_groups.contains_key(&group_id) {
            panic!("Process group with ID {} does not exist", group_id);
        }
        let process_group = process_groups.get(&group_id).unwrap();
        let process = process_group
            .processes
            .iter()
            .find(|process| process.id == process_id)
            .unwrap();
        process.state
    }
}

这个调度器的实现基于 Rust 的标准库，使用了 Mutex 和 Arc 来实现多线程安全。我们可以使用这个调度器来管理进程组，启动、暂停、停止进程组，添加和移除进程等。