delphi – 为什么使用IOmniThreadPool的以下代码会导致访问冲突

在我们的Delphi XE4应用程序中,我们使用的是一个OmniThreadPool,MaxExecuting = 4来提高某种计算的效率.不幸的是,我们遇到间歇访问冲突时遇到麻烦(参见例如以下MadExcept错误报告 http://ec2-72-44-42-247.compute-1.amazonaws.com/BugReport.txt).我能够构建以下示例来演示问题.运行以下控制台应用程序后,System.SyncObjs.TCriticalSection.Acquire中的访问冲突通常在一分钟内发生.有人可以告诉我在下面的代码中我做错了什么,还是告诉我另一种达到理想结果的方法？

program OmniPoolCrashTest;

{$APPTYPE CONSOLE}

uses
  Winapi.Windows,System.SysUtils,DSiWin32,GpLists,OtlSync,OtlThreadPool,OtlTaskControl,OtlComm,OtlTask;

const
  cTimeToWaitForException = 10 * 60 * 1000;  // program exits if no exception after 10 minutes
  MSG_CALLEE_FINISHED = 113; // our custom Omni message ID
  cMaxAllowedParallelCallees = 4; // enforced via thread pool
  cCalleeDuration = 10; // 10 miliseconds
  cCallerRepetitionInterval = 200; // 200 milliseconds
  cDefaultNumberOfCallers = 10; // 10 callers each issuing 1 call every 200 milliseconds

var
  gv_OmniThreadPool : IOmniThreadPool;

procedure OmniTaskProcedure_Callee(const task: IOmniTask);
begin
  Sleep(cCalleeDuration);
  task.Comm.Send(MSG_CALLEE_FINISHED);
end;

procedure PerformThreadPoolTest();
var
  OmniTaskControl : IOmniTaskControl;
begin
  OmniTaskControl := CreateTask(OmniTaskProcedure_Callee).Schedule(gv_OmniThreadPool);
  WaitForSingleObject(OmniTaskControl.Comm.NewMessageEvent,INFINITE);
end;

procedure OmniTaskProcedure_Caller(const task: IOmniTask);
begin
  while not task.Terminated do begin
    PerformThreadPoolTest();
    Sleep(cCallerRepetitionInterval);
  end;
end;

var
  CallerTasks : TGpInterfaceList<IOmniTaskControl>;
  i : integer;
begin
  gv_OmniThreadPool := CreateThreadPool('CalleeThreadPool');
  gv_OmniThreadPool.MaxExecuting := cMaxAllowedParallelCallees;
  CallerTasks := TGpInterfaceList<IOmniTaskControl>.Create();
  for i := 1 to StrToIntDef(ParamStr(1),cDefaultNumberOfCallers) do begin
    CallerTasks.Add( CreateTask(OmniTaskProcedure_Caller).Run() );
  end;
  Sleep(cTimeToWaitForException);
  for i := 0 to CallerTasks.Count-1 do begin
    CallerTasks[i].Terminate();
  end;
  CallerTasks.Free();
end.

procedure OmniTaskProcedure_Callee(const task: IOmniTask);
begin
  Sleep(cCalleeDuration);
end;

procedure PerformThreadPoolTest();
var
  OmniTaskControl : IOmniTaskControl;
begin
  OmniTaskControl := CreateTask(OmniTaskProcedure_Callee).Schedule(gv_OmniThreadPool);
  OmniTaskControl.WaitFor(INFINITE);
end;