當我停止線程'srch_slave_thread'並將終止標誌設置爲true時,(srch_slave_thread.terminate)釋放線程停止在析構函數中的'inherited'行,爲什麼?它是一個等待它掛起?如果我在析構函數中註釋掉「繼承」,則線程停止並釋放它自己。線程終止(再次...)
取出'繼承'並調試代碼後:爲什麼線程在調用析構函數後跳轉到DoTerminate方法?
謝謝。
Tsrch_slave_thread = class(TThread)
private
FSW: TStopWatch;
protected
procedure Execute; override;
public
SimpleEvent: TSimpleEvent;
procedure DoTerminate; override;
...
constructor Create;
destructor Destroy; override;
end;
創建一個事件obj。在構造函數>>
constructor Tsrch_slave_thread.create;
begin
inherited create(true);
Fsw := TStopWatch.Create;
SimpleEvent := TSimpleEvent.Create;
end;
在調用析構函數之後跳轉到這裏? >>
procedure Tsrch_slave_thread.DoTerminate;
begin
inherited;
self.simpleEvent.SetEvent;
end;
危在旦夕在析構函數繼承>>
destructor Tsrch_slave_thread.destroy;
begin
self.SimpleEvent.free;
inherited;
end;
這裏創建線程>>
function TMaster.th_slvsearch_start: integer;
begin
if not Assigned(Fslave_search_thread) then begin
Fslave_search_thread := TFslave_search_thread.create;
...
end
else begin
...
exit;
end;
with Fslave_search_thread do
begin
master := self;
master_HWND := self.fMsgHandlerHWND;
FreeOnTerminate := false;
OnTerminate := slvsrch_termination;
start;
end;
end;
回採線程開始在這裏>>
procedure TMaster.th_slvsearch_stop;
begin
Fslave_search_thread.Terminate;
end;
主題.Execute >>
procedure Tsrch_slave_thread.Execute;
var
text_orig: string;
activesearch: integer;
begin
FSW.Start;
while not terminated do begin
activesearch := master.CMD_LISTCNT;
//stopper refresh
synchronize(procedure begin
with self.master do
Fmasternode.text := FmasterDat.MstrName + ' (' + floattostr(Fsw.ElapsedMilliseconds/1000) + 'sec - Searching)';
end);
if (SimpleEvent.WaitFor(2000) <> wrTimeOut) or (activesearch <> 1) then break;
end;
FSW.Stop;
end;
OnTerminate事件處理>>
procedure TMaster.slvsrch_termination(Sender: TObject);
begin
if Assigned(Fslave_search_thread) then
begin
self.FLastSearchTime := Fslave_search_thread.FSW.ElapsedMilliseconds/1000;
Fslave_search_thread.Free;
Fslave_search_thread := nil;
self.Factive_slv_search := 0;
end;
...
end;
*「爲什麼線程在調用析構函數後跳轉到DoTerminate方法?」*因爲有人應該說線程終止,如果它不是明確的你,它是設置終止標誌的析構函數。 – TLama
@TLama,是的,但我用srch_slave_thread.terminate設置標誌 – grinner