// 进程管理函数
#region 创建进程Create
// 创建进程
public void create(Free _free, Ready _ready, Label[] label_storage, Storage _storage, CPU _cpu, string instructions) // 创建进程时输入指令
{
// 申请空白进程控制块,得到空闲PCB的内部标识符
int pcb_num = _cpu.getPcbFromFreequeue(_free, _cpu);
if (pcb_num == 0)
{
MessageBox.Show("无可用空闲PCB块", "创建进程失败", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation);
}
else
{
// 主存申请，程序装入模拟主存
_storage.allocate(pcb_num, instructions, _storage, label_storage);
// 更改进程状态为ready
_cpu.tempPCB.state = ProcessState.ready;
// 将进程链入就绪队列
// 如果是第一个
if (_ready.num == 0)
{
_ready.PCBqueue[_ready.num] = _cpu.tempPCB;
// 创建进程时，将所有指令存在instructions字符串中
_ready.PCBqueue[_ready.num].instructions = instructions;
_ready.num++;
}
else if (_ready.num >= 1 && _ready.num < 8)
{
_ready.PCBqueue[_ready.num] = _cpu.tempPCB;
// 创建进程时，将所有指令存在instructions字符串中
_ready.PCBqueue[_ready.num].instructions = instructions;
// 修改next，使头尾相接，成环形链
//_ready.PCBqueue[_ready.num - 1].next = _ready.num;
//_ready.PCBqueue[_ready.num].next = 0;
_ready.num++;
}
else
{
MessageBox.Show(_ready.num.ToString(), "创建进程失败", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation);
}
}
}
// 占用完毕设备，回收设备，将进程插入ready
public void recoveryDevice(CPU _cpu, Device _device, Ready _ready, Block _block, int pcbNo, int deviceType, int deviceNum)
{
// 修改设备状态
if (deviceType == 1)
{
_device.deviceA[deviceNum - 1].name = "null";
_device.deviceA[deviceNum - 1].pcb_num = 0;
_device.deviceA[deviceNum - 1].state = deviceState.free;
_device.deviceA[deviceNum - 1].time = 0;
}
else if (deviceType == 2)
{
_device.deviceB[deviceNum - 1].name = "null";
_device.deviceB[deviceNum - 1].pcb_num = 0;
_device.deviceB[deviceNum - 1].state = deviceState.free;
_device.deviceB[deviceNum - 1].time = 0;
}
// 修改pcb中的设备属性
_block.PCBqueue[pcbNo].deviceNum = 0;
_block.PCBqueue[pcbNo].deviceType = 0;
// 唤醒进程
_cpu.wakeup(pcbNo, _block, _ready, _cpu);
}