// 新建任务
static void NewTask(SaveTask.Type type, Save save, ISaveTarget target)
{
var task = new SaveTask()
{
type = type,
save = save,
target = target,
};
// 预处理
switch (type)
{
case SaveTask.Type.Save:
task.exception = save.ToBytes(out task.data);
break;
default:
task.data = null;
task.exception = null;
break;
}
_tasks.Enqueue(task);
// 第一个任务在创建后立即开始执行
if (_tasks.Count == 1)
{
BeginTask();
}
}
// 新建任务
void NewTask(SaveTask.Type type, Save save, IStorageTarget target)
{
if (_disposed)
{
throw new Exception("SaveManager had already disposed.");
}
var task = new SaveTask()
{
type = type,
save = save,
target = target,
};
// 前期处理
switch (type)
{
case SaveTask.Type.Save:
task.exception = save.ToBytes(out task.data);
break;
default:
task.data = null;
task.exception = null;
break;
}
_tasks.Enqueue(task);
// 第一个任务需要主动唤起处理线程
if (_tasks.Count == 1)
{
OnBeginTask(_tasks.Peek());
}
}
// 后台线程
void BackgroundThread()
{
while (true)
{
_event.WaitOne();
if (_task == null) return;
switch (_task.type)
{
case SaveTask.Type.Load:
try
{
_task.data = _task.target.Read();
}
catch (Exception e)
{
_task.exception = e;
}
break;
case SaveTask.Type.Save:
if (_task.success)
{
try
{
_task.target.Write(_task.data);
}
catch (Exception e)
{
_task.exception = e;
}
}
break;
case SaveTask.Type.Delete:
try
{
_task.target.Delete();
}
catch (Exception e)
{
_task.exception = e;
}
break;
}
_task = null;
_finished = true;
}
}
void ISaveTarget.DeleteAsync(SaveTask task)
{
ApplicationKit.update += MainThreadUpdate;
ThreadPool.QueueUserWorkItem(BackgroundThreadProc);
void BackgroundThreadProc(object _)
{
try
{
File.Delete(_fullPath);
}
catch (Exception e)
{
task.exception = e;
}
_finished = true;
}
}
void ISaveTarget.WriteAsync(SaveTask task)
{
ApplicationKit.update += MainThreadUpdate;
ThreadPool.QueueUserWorkItem(BackgroundThreadProc);
void BackgroundThreadProc(object _)
{
try
{
if (_fullDir != null) Directory.CreateDirectory(_fullDir);
using (var stream = new FileStream(_fullPath, FileMode.Create, FileAccess.Write))
{
stream.Write(task.data, 0, task.data.Length);
}
}
catch (Exception e)
{
task.exception = e;
}
_finished = true;
}
}
void ISaveTarget.ReadAsync(SaveTask task)
{
ApplicationKit.update += MainThreadUpdate;
ThreadPool.QueueUserWorkItem(BackgroundThreadProc);
void BackgroundThreadProc(object _)
{
try
{
using (var stream = new FileStream(_fullPath, FileMode.Open, FileAccess.Read))
{
task.data = new byte[stream.Length];
stream.Read(task.data, 0, task.data.Length);
}
}
catch (Exception e)
{
task.exception = e;
}
_finished = true;
}
}
/// <summary> /// 完成任务时触发 /// </summary> protected abstract void OnFinishTask(SaveTask task);
/// <summary> /// 开始任务时触发。当任务完成时设置 _finished 标记通知主线程 /// </summary> protected abstract void OnBeginTask(SaveTask task);
protected override void OnFinishTask(SaveTask task)
{
}
protected override void OnBeginTask(SaveTask task)
{
_task = task;
_event.Set();
}
