function ThreadProc(Thread: TThread): Integer;
var
FreeThread: Boolean;
begin
{$IFDEF LINUX}
if Thread.FSuspended then sem_wait(Thread.FCreateSuspendedSem);
{$ENDIF}
try
if not Thread.Terminated then
try
Thread.Execute;
except
Thread.FFatalException := AcquireExceptionObject;
end;
finally
FreeThread := Thread.FFreeOnTerminate;
Result := Thread.FReturnValue;
Thread.DoTerminate;
Thread.FFinished := True;
SignalSyncEvent;
if FreeThread then Thread.Free;
{$IFDEF MSWINDOWS}
EndThread(Result);
{$ENDIF}
{$IFDEF LINUX}
// Directly call pthread_exit since EndThread will detach the thread causing
// the pthread_join in TThread.WaitFor to fail. Also, make sure the EndThreadProc
// is called just like EndThread would do. EndThreadProc should not return
// and call pthread_exit itself.
if Assigned(EndThreadProc) then
EndThreadProc(Result);
pthread_exit(Pointer(Result));
{$ENDIF}
end;
end;
var
FreeThread: Boolean;
begin
{$IFDEF LINUX}
if Thread.FSuspended then sem_wait(Thread.FCreateSuspendedSem);
{$ENDIF}
try
if not Thread.Terminated then
try
Thread.Execute;
except
Thread.FFatalException := AcquireExceptionObject;
end;
finally
FreeThread := Thread.FFreeOnTerminate;
Result := Thread.FReturnValue;
Thread.DoTerminate;
Thread.FFinished := True;
SignalSyncEvent;
if FreeThread then Thread.Free;
{$IFDEF MSWINDOWS}
EndThread(Result);
{$ENDIF}
{$IFDEF LINUX}
// Directly call pthread_exit since EndThread will detach the thread causing
// the pthread_join in TThread.WaitFor to fail. Also, make sure the EndThreadProc
// is called just like EndThread would do. EndThreadProc should not return
// and call pthread_exit itself.
if Assigned(EndThreadProc) then
EndThreadProc(Result);
pthread_exit(Pointer(Result));
{$ENDIF}
end;
end;
从这里看出,其实TThread类是调用BeginThread来实现的,而线程关闭的时候(无论是Destroy或者OnTerminate)其实是调用了主线程来处理关闭方法的.所以以往在主线程CLOSE的时候来记录线程释放的日志基本上会不成功.嘿嘿.所以以后关闭程序前要读个秒表来个LOAD过程
这里联想到,以往写的代码里面有很多线程释放的时候再来释放数据库链接、释放类实例,貌似都执行不到的(也可能是DEBUG不到)。做了一下试验,在Thread里面加了几个数据库链接,然后没有在Thread的Destroy里面CLOSE链接就直接释放Thread。结果,数据库链接好像也被关闭了,嘿嘿,难道是操作系统弄的还是数据库客户端来关的?还是未搞懂线程释放的话线程内资源是如何释放的!