1 |
{************************************************************************}
|
2 |
{ }
|
3 |
{ Borland Delphi Visual Component Library }
|
4 |
{ InterBase Express core components }
|
5 |
{ }
|
6 |
{ Copyright (c) 1998-2000 Inprise Corporation }
|
7 |
{ }
|
8 |
{ InterBase Express is based in part on the product }
|
9 |
{ Free IB Components, written by Gregory H. Deatz for }
|
10 |
{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
|
11 |
{ Free IB Components is used under license. }
|
12 |
{ }
|
13 |
{ The contents of this file are subject to the InterBase }
|
14 |
{ Public License Version 1.0 (the "License"); you may not }
|
15 |
{ use this file except in compliance with the License. You }
|
16 |
{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
|
17 |
{ Software distributed under the License is distributed on }
|
18 |
{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
|
19 |
{ express or implied. See the License for the specific language }
|
20 |
{ governing rights and limitations under the License. }
|
21 |
{ The Original Code was created by InterBase Software Corporation }
|
22 |
{ and its successors. }
|
23 |
{ Portions created by Inprise Corporation are Copyright (C) Inprise }
|
24 |
{ Corporation. All Rights Reserved. }
|
25 |
{ Contributor(s): Jeff Overcash }
|
26 |
{ }
|
27 |
{ IBX For Lazarus (Firebird Express) }
|
28 |
{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
|
29 |
{ Portions created by MWA Software are copyright McCallum Whyman }
|
30 |
{ Associates Ltd 2011 - 2018 }
|
31 |
{ }
|
32 |
{************************************************************************}
|
33 |
|
34 |
{
|
35 |
This unit has been significantly revised for the Lazarus port. Specially,
|
36 |
there was a need to re-organise the code to isolate the Windows specific
|
37 |
IPC and to introduce SV5 IPC as an alternative for Linux and other platforms.
|
38 |
}
|
39 |
|
40 |
unit IBSQLMonitor;
|
41 |
|
42 |
{$Mode Delphi}
|
43 |
|
44 |
{$codepage UTF8}
|
45 |
|
46 |
{ $DEFINE DEBUG}
|
47 |
|
48 |
interface
|
49 |
|
50 |
uses
|
51 |
IB, IBUtils, IBSQL, IBCustomDataSet, IBDatabase, DB, IBInternals,
|
52 |
SysUtils, Classes;
|
53 |
|
54 |
{Note that the original inter-thread communication between the Reader Thread and
|
55 |
the ISQL Monitor used the Windows PostMessage interface. This is currently not
|
56 |
useable under the FPC RTL as AllocateHWnd is not functional. It has been replaced
|
57 |
by the use of the Synchronize method.}
|
58 |
|
59 |
{$IFDEF WINDOWS}
|
60 |
{$DEFINE USE_WINDOWS_IPC}
|
61 |
{$ENDIF}
|
62 |
|
63 |
{$IFDEF UNIX}
|
64 |
{$DEFINE USE_SV5_IPC}
|
65 |
{$ENDIF}
|
66 |
|
67 |
type
|
68 |
TIBCustomSQLMonitor = class;
|
69 |
|
70 |
TSQLEvent = procedure(EventText: String; EventTime : TDateTime) of object;
|
71 |
|
72 |
{ TIBCustomSQLMonitor }
|
73 |
|
74 |
TIBCustomSQLMonitor = class(TComponent)
|
75 |
private
|
76 |
FOnMonitoringDisabled: TNotifyEvent;
|
77 |
FOnSQLEvent: TSQLEvent;
|
78 |
FTraceFlags: TTraceFlags;
|
79 |
FEnabled: Boolean;
|
80 |
function GetReadCount: integer;
|
81 |
procedure SetEnabled(const Value: Boolean);
|
82 |
protected
|
83 |
procedure ReleaseObject; {Called from Writer Thread}
|
84 |
procedure ReceiveMessage(Msg: TObject); {Called from Reader Thread}
|
85 |
property OnSQL: TSQLEvent read FOnSQLEvent write FOnSQLEvent;
|
86 |
property OnMonitoringDisabled: TNotifyEvent read FOnMonitoringDisabled write FOnMonitoringDisabled;
|
87 |
property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
|
88 |
property Enabled : Boolean read FEnabled write SetEnabled default true;
|
89 |
public
|
90 |
constructor Create(AOwner: TComponent); override;
|
91 |
destructor Destroy; override;
|
92 |
procedure Release;
|
93 |
property ReadCount: integer read GetReadCount;
|
94 |
end;
|
95 |
|
96 |
{ TIBSQLMonitor }
|
97 |
|
98 |
TIBSQLMonitor = class(TIBCustomSQLMonitor)
|
99 |
published
|
100 |
property OnSQL;
|
101 |
property OnMonitoringDisabled;
|
102 |
property TraceFlags;
|
103 |
property Enabled;
|
104 |
end;
|
105 |
|
106 |
IIBSQLMonitorHook = interface
|
107 |
['{CF65434C-9B75-4298-BA7E-E6B85B3C769D}']
|
108 |
procedure RegisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
109 |
procedure UnregisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
110 |
procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
111 |
procedure SQLPrepare(qry: TIBSQL);
|
112 |
procedure SQLExecute(qry: TIBSQL);
|
113 |
procedure SQLFetch(qry: TIBSQL);
|
114 |
procedure DBConnect(db: TIBDatabase);
|
115 |
procedure DBDisconnect(db: TIBDatabase);
|
116 |
procedure TRStart(tr: TIBTransaction);
|
117 |
procedure TRCommit(tr: TIBTransaction);
|
118 |
procedure TRCommitRetaining(tr: TIBTransaction);
|
119 |
procedure TRRollback(tr: TIBTransaction);
|
120 |
procedure TRRollbackRetaining(tr: TIBTransaction);
|
121 |
procedure ServiceAttach(service: TIBMonitoredService); overload;
|
122 |
procedure ServiceDetach(service: TIBMonitoredService); overload;
|
123 |
procedure ServiceQuery(service: TIBMonitoredService); overload;
|
124 |
procedure ServiceStart(service: TIBMonitoredService); overload;
|
125 |
procedure ServiceAttach(service: TIBXMonitoredConnection); overload;
|
126 |
procedure ServiceDetach(service: TIBXMonitoredConnection); overload;
|
127 |
procedure ServiceQuery(service: TIBXMonitoredService); overload;
|
128 |
procedure ServiceStart(service: TIBXMonitoredService); overload;
|
129 |
procedure SendMisc(Msg : String);
|
130 |
function GetTraceFlags : TTraceFlags;
|
131 |
function GetMonitorCount : Integer;
|
132 |
function GetWriteCount: integer;
|
133 |
procedure SetTraceFlags(const Value : TTraceFlags);
|
134 |
function GetEnabled : boolean;
|
135 |
procedure SetEnabled(const Value : Boolean);
|
136 |
property TraceFlags: TTraceFlags read GetTraceFlags write SetTraceFlags;
|
137 |
property Enabled : Boolean read GetEnabled write SetEnabled;
|
138 |
end;
|
139 |
|
140 |
|
141 |
function MonitorHook: IIBSQLMonitorHook;
|
142 |
procedure EnableMonitoring;
|
143 |
procedure DisableMonitoring;
|
144 |
function MonitoringEnabled: Boolean;
|
145 |
|
146 |
implementation
|
147 |
|
148 |
uses IBIPC, contnrs, syncobjs, CustApp, IBMessages;
|
149 |
|
150 |
const
|
151 |
cWriteMessageAvailable = 'WriterMsgQueue';
|
152 |
|
153 |
type
|
154 |
{ TIBSQLMonitorHook }
|
155 |
|
156 |
TIBSQLMonitorHook = class(TInterfacedObject, IIBSQLMonitorHook)
|
157 |
private
|
158 |
FIPCInterface: IIPCInterface;
|
159 |
FTraceFlags: TTraceFlags;
|
160 |
FEnabled: Boolean;
|
161 |
FWriteCount: integer;
|
162 |
protected
|
163 |
procedure WriteSQLData(Text: String; DataType: TTraceFlag);
|
164 |
public
|
165 |
constructor Create;
|
166 |
procedure RegisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
167 |
procedure UnregisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
168 |
procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
169 |
procedure SQLPrepare(qry: TIBSQL); virtual;
|
170 |
procedure SQLExecute(qry: TIBSQL); virtual;
|
171 |
procedure SQLFetch(qry: TIBSQL); virtual;
|
172 |
procedure DBConnect(db: TIBDatabase); virtual;
|
173 |
procedure DBDisconnect(db: TIBDatabase); virtual;
|
174 |
procedure TRStart(tr: TIBTransaction); virtual;
|
175 |
procedure TRCommit(tr: TIBTransaction); virtual;
|
176 |
procedure TRCommitRetaining(tr: TIBTransaction); virtual;
|
177 |
procedure TRRollback(tr: TIBTransaction); virtual;
|
178 |
procedure TRRollbackRetaining(tr: TIBTransaction); virtual;
|
179 |
procedure ServiceAttach(service: TIBMonitoredService); virtual; overload;
|
180 |
procedure ServiceDetach(service: TIBMonitoredService); virtual; overload;
|
181 |
procedure ServiceQuery(service: TIBMonitoredService); virtual; overload;
|
182 |
procedure ServiceStart(service: TIBMonitoredService); virtual; overload;
|
183 |
procedure ServiceAttach(service: TIBXMonitoredConnection); virtual; overload;
|
184 |
procedure ServiceDetach(service: TIBXMonitoredConnection); virtual; overload;
|
185 |
procedure ServiceQuery(service: TIBXMonitoredService); virtual; overload;
|
186 |
procedure ServiceStart(service: TIBXMonitoredService); virtual; overload;
|
187 |
procedure SendMisc(Msg : String);
|
188 |
function GetEnabled: Boolean;
|
189 |
function GetTraceFlags: TTraceFlags;
|
190 |
function GetMonitorCount : Integer;
|
191 |
function GetWriteCount: integer;
|
192 |
procedure SetEnabled(const Value: Boolean);
|
193 |
procedure SetTraceFlags(const Value: TTraceFlags);
|
194 |
procedure ForceRelease;
|
195 |
property TraceFlags: TTraceFlags read GetTraceFlags write SetTraceFlags;
|
196 |
property Enabled : Boolean read GetEnabled write SetEnabled default true;
|
197 |
end;
|
198 |
|
199 |
{ TWriterThread }
|
200 |
|
201 |
TWriterThread = class(TThread)
|
202 |
private
|
203 |
{ Private declarations }
|
204 |
FIPCInterface: IIPCInterface;
|
205 |
FMsgs : TObjectList;
|
206 |
FCriticalSection: TCriticalSection;
|
207 |
FMsgAvailable: TEventObject;
|
208 |
FWriteCount: integer;
|
209 |
procedure RemoveFromList;
|
210 |
procedure PostRelease;
|
211 |
public
|
212 |
procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
213 |
protected
|
214 |
procedure BeginWrite;
|
215 |
procedure EndWrite;
|
216 |
procedure Execute; override;
|
217 |
procedure WriteToBuffer;
|
218 |
public
|
219 |
constructor Create(IPCInterface: IIPCInterface);
|
220 |
destructor Destroy; override;
|
221 |
procedure WriteSQLData(Msg : String; DataType : TTraceFlag);
|
222 |
end;
|
223 |
|
224 |
{ TReaderThread }
|
225 |
|
226 |
TReaderThread = class(TThread)
|
227 |
private
|
228 |
{ Private declarations }
|
229 |
st : TTraceObject;
|
230 |
FMonitors : TObjectList;
|
231 |
FIPCInterface: IIPCInterface;
|
232 |
FCriticalSection: TCriticalSection;
|
233 |
FReadCount: integer;
|
234 |
procedure AlertMonitors;
|
235 |
protected
|
236 |
procedure BeginRead;
|
237 |
procedure EndRead;
|
238 |
procedure ReadSQLData;
|
239 |
procedure Execute; override;
|
240 |
public
|
241 |
constructor Create(IPCInterface: IIPCInterface);
|
242 |
destructor Destroy; override;
|
243 |
procedure AddMonitor(Arg : TIBCustomSQLMonitor);
|
244 |
procedure RemoveMonitor(Arg : TIBCustomSQLMonitor);
|
245 |
end;
|
246 |
|
247 |
|
248 |
var
|
249 |
FWriterThread : TWriterThread;
|
250 |
FReaderThread : TReaderThread;
|
251 |
_MonitorHook: TIBSQLMonitorHook;
|
252 |
bDone: Boolean;
|
253 |
CS : TCriticalSection;
|
254 |
|
255 |
const
|
256 |
ApplicationTitle: string = 'Unknown';
|
257 |
|
258 |
{ TIBCustomSQLMonitor }
|
259 |
|
260 |
constructor TIBCustomSQLMonitor.Create(AOwner: TComponent);
|
261 |
var aParent: TComponent;
|
262 |
begin
|
263 |
inherited Create(AOwner);
|
264 |
FTraceFlags := [tfqPrepare .. tfMisc];
|
265 |
if not (csDesigning in ComponentState) then
|
266 |
begin
|
267 |
aParent := AOwner;
|
268 |
while aParent <> nil do
|
269 |
begin
|
270 |
if aParent is TCustomApplication then
|
271 |
begin
|
272 |
ApplicationTitle := TCustomApplication(aParent).Title;
|
273 |
break;
|
274 |
end;
|
275 |
aParent := aParent.Owner;
|
276 |
end;
|
277 |
MonitorHook.RegisterMonitor(self);
|
278 |
end;
|
279 |
FEnabled := true;
|
280 |
end;
|
281 |
|
282 |
destructor TIBCustomSQLMonitor.Destroy;
|
283 |
begin
|
284 |
if not (csDesigning in ComponentState) then
|
285 |
begin
|
286 |
if FEnabled and assigned(_MonitorHook) then
|
287 |
MonitorHook.UnregisterMonitor(self);
|
288 |
end;
|
289 |
inherited Destroy;
|
290 |
end;
|
291 |
|
292 |
procedure TIBCustomSQLMonitor.Release;
|
293 |
begin
|
294 |
MonitorHook.ReleaseMonitor(self);
|
295 |
end;
|
296 |
|
297 |
procedure TIBCustomSQLMonitor.ReleaseObject;
|
298 |
begin
|
299 |
Free
|
300 |
end;
|
301 |
|
302 |
procedure TIBCustomSQLMonitor.ReceiveMessage(Msg: TObject);
|
303 |
var
|
304 |
st: TTraceObject;
|
305 |
begin
|
306 |
st := (Msg as TTraceObject);
|
307 |
if (Assigned(FOnSQLEvent)) and
|
308 |
(st.FDataType in FTraceFlags) then
|
309 |
FOnSQLEvent(st.FMsg, st.FTimeStamp);
|
310 |
if assigned(OnMonitoringDisabled) and (st.FDataType = tfDisabled) then
|
311 |
OnMonitoringDisabled(self);
|
312 |
st.Free;
|
313 |
end;
|
314 |
|
315 |
procedure TIBCustomSQLMonitor.SetEnabled(const Value: Boolean);
|
316 |
begin
|
317 |
if Value <> FEnabled then
|
318 |
begin
|
319 |
FEnabled := Value;
|
320 |
if not (csDesigning in ComponentState) then
|
321 |
if FEnabled then
|
322 |
Monitorhook.RegisterMonitor(self)
|
323 |
else
|
324 |
MonitorHook.UnregisterMonitor(self);
|
325 |
end;
|
326 |
end;
|
327 |
|
328 |
function TIBCustomSQLMonitor.GetReadCount: integer;
|
329 |
begin
|
330 |
Result := FReaderThread.FReadCount;
|
331 |
end;
|
332 |
|
333 |
{ TIBSQLMonitorHook }
|
334 |
|
335 |
constructor TIBSQLMonitorHook.Create;
|
336 |
begin
|
337 |
inherited Create;
|
338 |
FTraceFlags := [tfQPrepare..tfMisc];
|
339 |
FIPCInterface := CreateIPCInterface;
|
340 |
FEnabled := false;
|
341 |
end;
|
342 |
|
343 |
procedure TIBSQLMonitorHook.DBConnect(db: TIBDatabase);
|
344 |
var
|
345 |
st : String;
|
346 |
begin
|
347 |
if FEnabled then
|
348 |
begin
|
349 |
if not (tfConnect in FTraceFlags * db.TraceFlags) then
|
350 |
Exit;
|
351 |
st := db.Name + ': [Connect]'; {do not localize}
|
352 |
WriteSQLData(st, tfConnect);
|
353 |
end;
|
354 |
end;
|
355 |
|
356 |
procedure TIBSQLMonitorHook.DBDisconnect(db: TIBDatabase);
|
357 |
var
|
358 |
st: String;
|
359 |
begin
|
360 |
if (Self = nil) then exit;
|
361 |
if FEnabled then
|
362 |
begin
|
363 |
if not (tfConnect in FTraceFlags * db.TraceFlags) then
|
364 |
Exit;
|
365 |
st := db.Name + ': [Disconnect]'; {do not localize}
|
366 |
WriteSQLData(st, tfConnect);
|
367 |
end;
|
368 |
end;
|
369 |
|
370 |
function TIBSQLMonitorHook.GetEnabled: Boolean;
|
371 |
begin
|
372 |
Result := FEnabled;
|
373 |
end;
|
374 |
|
375 |
function TIBSQLMonitorHook.GetMonitorCount: Integer;
|
376 |
begin
|
377 |
Result := FIPCInterface.MonitorCount
|
378 |
end;
|
379 |
|
380 |
function TIBSQLMonitorHook.GetWriteCount: integer;
|
381 |
begin
|
382 |
if assigned(FWriterThread) then
|
383 |
Result := FWriterThread.FWriteCount
|
384 |
else
|
385 |
Result := FWriteCount;
|
386 |
end;
|
387 |
|
388 |
function TIBSQLMonitorHook.GetTraceFlags: TTraceFlags;
|
389 |
begin
|
390 |
Result := FTraceFlags;
|
391 |
end;
|
392 |
|
393 |
procedure TIBSQLMonitorHook.RegisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
|
394 |
begin
|
395 |
{$IFDEF DEBUG}writeln('Register Monitor');{$ENDIF}
|
396 |
if not Assigned(FReaderThread) then
|
397 |
FReaderThread := TReaderThread.Create(FIPCInterface);
|
398 |
FReaderThread.AddMonitor(SQLMonitor);
|
399 |
end;
|
400 |
|
401 |
procedure TIBSQLMonitorHook.ReleaseMonitor(Arg: TIBCustomSQLMonitor);
|
402 |
begin
|
403 |
FWriterThread.ReleaseMonitor(Arg);
|
404 |
end;
|
405 |
|
406 |
procedure TIBSQLMonitorHook.SendMisc(Msg: String);
|
407 |
begin
|
408 |
if FEnabled then
|
409 |
begin
|
410 |
WriteSQLData(Msg, tfMisc);
|
411 |
end;
|
412 |
end;
|
413 |
|
414 |
procedure TIBSQLMonitorHook.ServiceAttach(service: TIBMonitoredService);
|
415 |
var
|
416 |
st: String;
|
417 |
begin
|
418 |
if FEnabled then
|
419 |
begin
|
420 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
421 |
Exit;
|
422 |
st := service.Name + ': [Attach]'; {do not localize}
|
423 |
WriteSQLData(st, tfService);
|
424 |
end;
|
425 |
end;
|
426 |
|
427 |
procedure TIBSQLMonitorHook.ServiceDetach(service: TIBMonitoredService);
|
428 |
var
|
429 |
st: String;
|
430 |
begin
|
431 |
if FEnabled then
|
432 |
begin
|
433 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
434 |
Exit;
|
435 |
st := service.Name + ': [Detach]'; {do not localize}
|
436 |
WriteSQLData(st, tfService);
|
437 |
end;
|
438 |
end;
|
439 |
|
440 |
procedure TIBSQLMonitorHook.ServiceQuery(service: TIBMonitoredService);
|
441 |
var
|
442 |
st: String;
|
443 |
begin
|
444 |
if FEnabled then
|
445 |
begin
|
446 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
447 |
Exit;
|
448 |
st := service.Name + ': [Query]'; {do not localize}
|
449 |
WriteSQLData(st, tfService);
|
450 |
end;
|
451 |
end;
|
452 |
|
453 |
procedure TIBSQLMonitorHook.ServiceStart(service: TIBMonitoredService);
|
454 |
var
|
455 |
st: String;
|
456 |
begin
|
457 |
if FEnabled then
|
458 |
begin
|
459 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
460 |
Exit;
|
461 |
st := service.Name + ': [Start]'; {do not localize}
|
462 |
WriteSQLData(st, tfService);
|
463 |
end;
|
464 |
end;
|
465 |
|
466 |
procedure TIBSQLMonitorHook.ServiceAttach(service: TIBXMonitoredConnection);
|
467 |
var
|
468 |
st: String;
|
469 |
begin
|
470 |
if FEnabled then
|
471 |
begin
|
472 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
473 |
Exit;
|
474 |
st := service.Name + ': [Attach]'; {do not localize}
|
475 |
WriteSQLData(st, tfService);
|
476 |
end;
|
477 |
end;
|
478 |
|
479 |
procedure TIBSQLMonitorHook.ServiceDetach(service: TIBXMonitoredConnection);
|
480 |
var
|
481 |
st: String;
|
482 |
begin
|
483 |
if FEnabled then
|
484 |
begin
|
485 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
486 |
Exit;
|
487 |
st := service.Name + ': [Detach]'; {do not localize}
|
488 |
WriteSQLData(st, tfService);
|
489 |
end;
|
490 |
end;
|
491 |
|
492 |
procedure TIBSQLMonitorHook.ServiceQuery(service: TIBXMonitoredService);
|
493 |
var
|
494 |
st: String;
|
495 |
begin
|
496 |
if FEnabled then
|
497 |
begin
|
498 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
499 |
Exit;
|
500 |
st := service.Name + ': [Query]'; {do not localize}
|
501 |
WriteSQLData(st, tfService);
|
502 |
end;
|
503 |
end;
|
504 |
|
505 |
procedure TIBSQLMonitorHook.ServiceStart(service: TIBXMonitoredService);
|
506 |
var
|
507 |
st: String;
|
508 |
begin
|
509 |
if FEnabled then
|
510 |
begin
|
511 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
512 |
Exit;
|
513 |
st := service.Name + ': [Start]'; {do not localize}
|
514 |
WriteSQLData(st, tfService);
|
515 |
end;
|
516 |
end;
|
517 |
|
518 |
procedure TIBSQLMonitorHook.SetEnabled(const Value: Boolean);
|
519 |
begin
|
520 |
if FEnabled = Value then Exit;
|
521 |
|
522 |
FEnabled := Value;
|
523 |
if FEnabled then
|
524 |
begin
|
525 |
if not Assigned(FWriterThread) then
|
526 |
FWriterThread := TWriterThread.Create(FIPCInterface);
|
527 |
(* {$ifdef UNIX}
|
528 |
if not IsMultiThread then
|
529 |
IBError(ibxeMultiThreadRequired,['IBSQLMonitor']);
|
530 |
{$endif}*)
|
531 |
end;
|
532 |
if (not FEnabled) and (Assigned(FWriterThread)) then
|
533 |
begin
|
534 |
WriteSQLData('Monitoring Disabled',tfDisabled);
|
535 |
FWriterThread.Terminate;
|
536 |
FWriterThread.WaitFor;
|
537 |
FWriteCount := FWriterThread.FWriteCount;
|
538 |
FreeAndNil(FWriterThread);
|
539 |
end;
|
540 |
end;
|
541 |
|
542 |
procedure TIBSQLMonitorHook.SetTraceFlags(const Value: TTraceFlags);
|
543 |
begin
|
544 |
FTraceFlags := Value
|
545 |
end;
|
546 |
|
547 |
procedure TIBSQLMonitorHook.ForceRelease;
|
548 |
begin
|
549 |
if Assigned(FReaderThread) then
|
550 |
begin
|
551 |
FReaderThread.Terminate;
|
552 |
if not Assigned(FWriterThread) then
|
553 |
FWriterThread := TWriterThread.Create(FIPCInterface);
|
554 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
555 |
end;
|
556 |
end;
|
557 |
|
558 |
procedure TIBSQLMonitorHook.SQLExecute(qry: TIBSQL);
|
559 |
var
|
560 |
st: String;
|
561 |
i: Integer;
|
562 |
begin
|
563 |
if FEnabled then
|
564 |
begin
|
565 |
if not ((tfQExecute in (FTraceFlags * qry.Database.TraceFlags)) or
|
566 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags)) ) then
|
567 |
Exit;
|
568 |
if qry.Owner is TIBCustomDataSet then
|
569 |
st := TIBCustomDataSet(qry.Owner).Name
|
570 |
else
|
571 |
st := qry.Name;
|
572 |
st := st + ': [Execute] ' + qry.SQL.Text; {do not localize}
|
573 |
if qry.Params.GetCount > 0 then begin
|
574 |
for i := 0 to qry.Params.GetCount - 1 do begin
|
575 |
st := st + LineEnding + ' ' + qry.Params[i].Name + ' = ';
|
576 |
try
|
577 |
if qry.Params[i].IsNull then
|
578 |
st := st + '<NULL>'; {do not localize}
|
579 |
st := st + qry.Params[i].AsString;
|
580 |
except
|
581 |
st := st + '<' + SCantPrintValue + '>';
|
582 |
end;
|
583 |
end;
|
584 |
end;
|
585 |
WriteSQLData(st, tfQExecute);
|
586 |
end;
|
587 |
end;
|
588 |
|
589 |
procedure TIBSQLMonitorHook.SQLFetch(qry: TIBSQL);
|
590 |
var
|
591 |
st: String;
|
592 |
begin
|
593 |
if FEnabled then
|
594 |
begin
|
595 |
if not ((tfQFetch in (FTraceFlags * qry.Database.TraceFlags)) or
|
596 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
597 |
Exit;
|
598 |
if qry.Owner is TIBCustomDataSet then
|
599 |
st := TIBCustomDataSet(qry.Owner).Name
|
600 |
else
|
601 |
st := qry.Name;
|
602 |
st := st + ': [Fetch] ' + qry.SQL.Text; {do not localize}
|
603 |
if (qry.EOF) then
|
604 |
st := st + LineEnding + ' ' + SEOFReached;
|
605 |
WriteSQLData(st, tfQFetch);
|
606 |
end;
|
607 |
end;
|
608 |
|
609 |
procedure TIBSQLMonitorHook.SQLPrepare(qry: TIBSQL);
|
610 |
var
|
611 |
st: String;
|
612 |
begin
|
613 |
if FEnabled then
|
614 |
begin
|
615 |
if not ((tfQPrepare in (FTraceFlags * qry.Database.TraceFlags)) or
|
616 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
617 |
Exit;
|
618 |
if qry.Owner is TIBCustomDataSet then
|
619 |
st := TIBCustomDataSet(qry.Owner).Name
|
620 |
else
|
621 |
st := qry.Name;
|
622 |
st := st + ': [Prepare] ' + qry.SQL.Text + LineEnding; {do not localize}
|
623 |
st := st + ' Plan: ' + qry.Plan; {do not localize}
|
624 |
WriteSQLData(st, tfQPrepare);
|
625 |
end;
|
626 |
end;
|
627 |
|
628 |
procedure TIBSQLMonitorHook.TRCommit(tr: TIBTransaction);
|
629 |
var
|
630 |
st: String;
|
631 |
begin
|
632 |
if FEnabled then
|
633 |
begin
|
634 |
if Assigned(tr.DefaultDatabase) and
|
635 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
636 |
Exit;
|
637 |
st := tr.Name + ': [Commit (Hard commit)]'; {do not localize}
|
638 |
WriteSQLData(st, tfTransact);
|
639 |
end;
|
640 |
end;
|
641 |
|
642 |
procedure TIBSQLMonitorHook.TRCommitRetaining(tr: TIBTransaction);
|
643 |
var
|
644 |
st: String;
|
645 |
begin
|
646 |
if FEnabled then
|
647 |
begin
|
648 |
if Assigned(tr.DefaultDatabase) and
|
649 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
650 |
Exit;
|
651 |
st := tr.Name + ': [Commit retaining (Soft commit)]'; {do not localize}
|
652 |
WriteSQLData(st, tfTransact);
|
653 |
end;
|
654 |
end;
|
655 |
|
656 |
procedure TIBSQLMonitorHook.TRRollback(tr: TIBTransaction);
|
657 |
var
|
658 |
st: String;
|
659 |
begin
|
660 |
if FEnabled then
|
661 |
begin
|
662 |
if Assigned(tr.DefaultDatabase) and
|
663 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
664 |
Exit;
|
665 |
st := tr.Name + ': [Rollback]'; {do not localize}
|
666 |
WriteSQLData(st, tfTransact);
|
667 |
end;
|
668 |
end;
|
669 |
|
670 |
procedure TIBSQLMonitorHook.TRRollbackRetaining(tr: TIBTransaction);
|
671 |
var
|
672 |
st: String;
|
673 |
begin
|
674 |
if FEnabled then
|
675 |
begin
|
676 |
if Assigned(tr.DefaultDatabase) and
|
677 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
678 |
Exit;
|
679 |
st := tr.Name + ': [Rollback retaining (Soft rollback)]'; {do not localize}
|
680 |
WriteSQLData(st, tfTransact);
|
681 |
end;
|
682 |
end;
|
683 |
|
684 |
procedure TIBSQLMonitorHook.TRStart(tr: TIBTransaction);
|
685 |
var
|
686 |
st: String;
|
687 |
begin
|
688 |
if FEnabled then
|
689 |
begin
|
690 |
if Assigned(tr.DefaultDatabase) and
|
691 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
692 |
Exit;
|
693 |
st := tr.Name + ': [Start transaction]'; {do not localize}
|
694 |
WriteSQLData(st, tfTransact);
|
695 |
end;
|
696 |
end;
|
697 |
|
698 |
procedure TIBSQLMonitorHook.UnregisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
|
699 |
var
|
700 |
Created : Boolean;
|
701 |
begin
|
702 |
{$IFDEF DEBUG}writeln('Unregister Monitor');{$ENDIF}
|
703 |
if assigned(FReaderThread) then
|
704 |
begin
|
705 |
FReaderThread.RemoveMonitor(SQLMonitor);
|
706 |
if FReaderThread.FMonitors.Count = 0 then
|
707 |
begin
|
708 |
FReaderThread.Terminate;
|
709 |
|
710 |
{ There is a possibility of a reader thread, but no writer one.
|
711 |
When in that situation, the reader needs to be released after
|
712 |
the terminate is set. To do that, create a Writer thread, send
|
713 |
the release code (a string of ' ' and type tfMisc) and then free
|
714 |
it up. }
|
715 |
|
716 |
Created := false;
|
717 |
if not Assigned(FWriterThread) then
|
718 |
begin
|
719 |
FWriterThread := TWriterThread.Create(FIPCInterface);
|
720 |
Created := true;
|
721 |
end;
|
722 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
723 |
{$IFDEF DEBUG}writeln('Wait for read Terminate');{$ENDIF}
|
724 |
FReaderThread.WaitFor;
|
725 |
if assigned(FReaderThread.FatalException) then
|
726 |
IBError(ibxeThreadFailed,['Reader',Exception(FReaderThread.FatalException).Message]);
|
727 |
{$IFDEF DEBUG}writeln('Freeing Reader Thread');{$ENDIF}
|
728 |
FreeAndNil(FReaderThread);
|
729 |
{$IFDEF DEBUG}writeln('Reader Thread Freed');{$ENDIF}
|
730 |
if Created then
|
731 |
begin
|
732 |
FWriterThread.Terminate;
|
733 |
{$IFDEF DEBUG}writeln('Wait for write Terminate');{$ENDIF}
|
734 |
FWriterThread.WaitFor;
|
735 |
if assigned(FWriterThread.FatalException) then
|
736 |
IBError(ibxeThreadFailed,['Writer',Exception(FWriterThread.FatalException).Message]);
|
737 |
FreeAndNil(FWriterThread);
|
738 |
end;
|
739 |
end;
|
740 |
end;
|
741 |
{$IFDEF DEBUG}writeln('Unregister done'){$ENDIF}
|
742 |
end;
|
743 |
|
744 |
procedure TIBSQLMonitorHook.WriteSQLData(Text: String;
|
745 |
DataType: TTraceFlag);
|
746 |
begin
|
747 |
// {$IFDEF DEBUG}writeln('Write SQL Data: '+Text);{$ENDIF}
|
748 |
Text := LineEnding + '[Application: ' + ApplicationTitle + ']' + LineEnding + Text; {do not localize}
|
749 |
FWriterThread.WriteSQLData(Text, DataType);
|
750 |
end;
|
751 |
|
752 |
{ TWriterThread }
|
753 |
|
754 |
constructor TWriterThread.Create(IPCInterface: IIPCInterface);
|
755 |
|
756 |
begin
|
757 |
inherited Create(true);
|
758 |
{$IFDEF DEBUG}writeln('Write Object Created');{$ENDIF}
|
759 |
FIPCInterface := IPCInterface;
|
760 |
FMsgs := TObjectList.Create(true);
|
761 |
FCriticalSection := TCriticalSection.Create;
|
762 |
FMsgAvailable := TEventObject.Create(FIPCInterface.Sa,true,false,cWriteMessageAvailable);
|
763 |
Start;
|
764 |
end;
|
765 |
|
766 |
destructor TWriterThread.Destroy;
|
767 |
begin
|
768 |
if assigned(FMsgs) then FMsgs.Free;
|
769 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
770 |
if assigned(FMsgAvailable) then FMsgAvailable.Free;
|
771 |
inherited Destroy;
|
772 |
end;
|
773 |
|
774 |
procedure TWriterThread.Execute;
|
775 |
begin
|
776 |
{$IFDEF DEBUG}writeln('Write Thread starts');{$ENDIF}
|
777 |
try
|
778 |
{ Place thread code here }
|
779 |
while ((not Terminated) and (not bDone)) or
|
780 |
(FMsgs.Count <> 0) do
|
781 |
begin
|
782 |
FMsgAvailable.WaitFor(cMsgWaitTime);
|
783 |
{ Any one listening? }
|
784 |
if FIPCInterface.MonitorCount = 0 then
|
785 |
begin
|
786 |
if FMsgs.Count <> 0 then
|
787 |
begin
|
788 |
{$IFDEF DEBUG}writeln('Write Thread Drop Message');{$ENDIF}
|
789 |
RemoveFromList;
|
790 |
end;
|
791 |
end
|
792 |
else
|
793 |
{ Anything to process? }
|
794 |
if FMsgs.Count <> 0 then
|
795 |
begin
|
796 |
{ If the current queued message is a release release the object }
|
797 |
if FMsgs.Items[0] is TReleaseObject then
|
798 |
begin
|
799 |
{$IFDEF DEBUG}writeln('Post Release');{$ENDIF}
|
800 |
if not Terminated then
|
801 |
Synchronize(PostRelease);
|
802 |
end
|
803 |
else
|
804 |
{ Otherwise write the TraceObject to the buffer }
|
805 |
begin
|
806 |
WriteToBuffer;
|
807 |
end;
|
808 |
end
|
809 |
else
|
810 |
begin
|
811 |
FCriticalSection.Enter;
|
812 |
try
|
813 |
if FMsgs.Count = 0 then
|
814 |
FMsgAvailable.ResetEvent
|
815 |
finally
|
816 |
FCriticalSection.Leave
|
817 |
end;
|
818 |
end;
|
819 |
end;
|
820 |
except on E: Exception do
|
821 |
begin
|
822 |
{$IFDEF DEBUG}writeln('Write Thread raised Exception: ' + E.Message);{$ENDIF}
|
823 |
raise
|
824 |
end
|
825 |
end;
|
826 |
{$IFDEF DEBUG}writeln('Write Thread Ends');{$ENDIF}
|
827 |
end;
|
828 |
|
829 |
procedure TWriterThread.WriteSQLData(Msg : String; DataType: TTraceFlag);
|
830 |
begin
|
831 |
FCriticalSection.Enter;
|
832 |
try
|
833 |
FMsgs.Add(TTraceObject.Create(Msg, DataType,FWriteCount));
|
834 |
Inc(FWriteCount);
|
835 |
finally
|
836 |
FCriticalSection.Leave;
|
837 |
end;
|
838 |
FMsgAvailable.SetEvent
|
839 |
end;
|
840 |
|
841 |
procedure TWriterThread.BeginWrite;
|
842 |
begin
|
843 |
{$IFDEF DEBUG}writeln('Begin Write');{$ENDIF}
|
844 |
with FIPCInterface do
|
845 |
begin
|
846 |
ReadReadyEvent.PassThroughGate; {Wait for readers to become ready }
|
847 |
WriterBusyEvent.Lock; {Set Busy State}
|
848 |
end;
|
849 |
{$IFDEF DEBUG}writeln('Begin Write Complete');{$ENDIF}
|
850 |
end;
|
851 |
|
852 |
procedure TWriterThread.EndWrite;
|
853 |
begin
|
854 |
{$IFDEF DEBUG}writeln('End Write');{$ENDIF}
|
855 |
with FIPCInterface do
|
856 |
begin
|
857 |
DataAvailableEvent.Unlock; { Signal Data Available. }
|
858 |
ReadFinishedEvent.PassThroughGate; {Wait for readers to finish }
|
859 |
DataAvailableEvent.Lock; {reset Data Available }
|
860 |
WriterBusyEvent.Unlock; {Signal not Busy }
|
861 |
end;
|
862 |
{$IFDEF DEBUG}writeln('End Write Complete');{$ENDIF}
|
863 |
end;
|
864 |
|
865 |
procedure TWriterThread.WriteToBuffer;
|
866 |
begin
|
867 |
FIPCInterface.WriteLock.Lock;
|
868 |
try
|
869 |
{ If there are no monitors throw out the message
|
870 |
The alternative is to have messages queue up until a
|
871 |
monitor is ready.}
|
872 |
|
873 |
if FIPCInterface.MonitorCount = 0 then
|
874 |
RemoveFromList
|
875 |
else
|
876 |
begin
|
877 |
BeginWrite;
|
878 |
try
|
879 |
{$IFDEF DEBUG}writeln('Write to Buffer. Msg No. ',TTraceObject(FMsgs[0]).FMsgNumber);{$ENDIF}
|
880 |
FIPCInterface.SendTrace(TTraceObject(FMsgs[0]))
|
881 |
finally
|
882 |
RemoveFromList;
|
883 |
EndWrite
|
884 |
end
|
885 |
end;
|
886 |
finally
|
887 |
FIPCInterface.WriteLock.Unlock;
|
888 |
end;
|
889 |
{$IFDEF DEBUG}writeln('Done Write');{$ENDIF}
|
890 |
end;
|
891 |
|
892 |
procedure TWriterThread.RemoveFromList;
|
893 |
begin
|
894 |
{$IFDEF DEBUG}writeln('Write Thread: Remove object From List');{$ENDIF}
|
895 |
FCriticalSection.Enter;
|
896 |
try
|
897 |
FMsgs.Remove(FMsgs[0]); { Pop the written item }
|
898 |
finally
|
899 |
FCriticalSection.Leave;
|
900 |
end;
|
901 |
end;
|
902 |
|
903 |
procedure TWriterThread.PostRelease;
|
904 |
var Monitor: TIBCustomSQLMonitor;
|
905 |
begin
|
906 |
Monitor := TReleaseObject(FMsgs.Items[0]).FMonitor as TIBCustomSQLMonitor;
|
907 |
Monitor.ReleaseObject
|
908 |
end;
|
909 |
|
910 |
procedure TWriterThread.ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
911 |
begin
|
912 |
FMsgs.Add(TReleaseObject.Create(Arg));
|
913 |
end;
|
914 |
|
915 |
{ ReaderThread }
|
916 |
|
917 |
procedure TReaderThread.AddMonitor(Arg: TIBCustomSQLMonitor);
|
918 |
begin
|
919 |
FCriticalSection.Enter;
|
920 |
try
|
921 |
if FMonitors.IndexOf(Arg) < 0 then
|
922 |
FMonitors.Add(Arg);
|
923 |
finally
|
924 |
FCriticalSection.Leave
|
925 |
end;
|
926 |
end;
|
927 |
|
928 |
procedure TReaderThread.AlertMonitors;
|
929 |
var i : Integer;
|
930 |
FTemp : TTraceObject;
|
931 |
Monitor: TIBCustomSQLMonitor;
|
932 |
begin
|
933 |
for i := 0 to FMonitors.Count - 1 do
|
934 |
begin
|
935 |
{$IFDEF DEBUG}writeln('Sending Message to Monitor ' +IntToStr(i));{$ENDIF}
|
936 |
FTemp := TTraceObject.Create(st);
|
937 |
Monitor := TIBCustomSQLMonitor(FMonitors[i]);
|
938 |
Monitor.ReceiveMessage(FTemp);
|
939 |
end;
|
940 |
end;
|
941 |
|
942 |
procedure TReaderThread.BeginRead;
|
943 |
begin
|
944 |
{$IFDEF DEBUG}writeln('Begin Read');{$ENDIF}
|
945 |
with FIPCInterface do
|
946 |
begin
|
947 |
WriterBusyEvent.PassthroughGate; { Wait for Writer not busy}
|
948 |
ReadFinishedEvent.Lock; { Prepare Read Finished Gate}
|
949 |
ReadReadyEvent.Unlock; { Signal read ready }
|
950 |
{$IFDEF DEBUG}writeln('Read Ready Unlocked');{$ENDIF}
|
951 |
DataAvailableEvent.PassthroughGate; { Wait for a Data Available }
|
952 |
end;
|
953 |
{$IFDEF DEBUG}writeln('Begin Read Complete');{$ENDIF}
|
954 |
end;
|
955 |
|
956 |
constructor TReaderThread.Create(IPCInterface: IIPCInterface);
|
957 |
begin
|
958 |
inherited Create(true);
|
959 |
FIPCInterface := IPCInterface;
|
960 |
st := TTraceObject.Create('', tfMisc);
|
961 |
FIPCInterface.IncMonitorCount;
|
962 |
FMonitors := TObjectList.Create(false);
|
963 |
FCriticalSection := TCriticalSection.Create;
|
964 |
{$IFDEF DEBUG}writeln('Reader Thread Created');{$ENDIF}
|
965 |
FIPCInterface.ReadReadyEvent.Lock; { Initialise Read Ready}
|
966 |
Start;
|
967 |
end;
|
968 |
|
969 |
destructor TReaderThread.Destroy;
|
970 |
begin
|
971 |
{$IFDEF DEBUG}writeln('Reader Thread Destory');{$ENDIF}
|
972 |
FIPCInterface.ReadReadyEvent.UnLock;
|
973 |
if assigned(FIPCInterface) and (FIPCInterface.MonitorCount > 0) then
|
974 |
FIPCInterface.DecMonitorCount;
|
975 |
FMonitors.Free;
|
976 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
977 |
st.Free;
|
978 |
inherited Destroy;
|
979 |
end;
|
980 |
|
981 |
procedure TReaderThread.EndRead;
|
982 |
begin
|
983 |
{$IFDEF DEBUG}writeln('End Read');{$ENDIF}
|
984 |
FIPCInterface.ReadReadyEvent.Lock; { reset Read Ready}
|
985 |
FIPCInterface.ReadFinishedEvent.Unlock; {Signal Read completed }
|
986 |
{$IFDEF DEBUG}writeln('End Read Complete');{$ENDIF}
|
987 |
end;
|
988 |
|
989 |
procedure TReaderThread.Execute;
|
990 |
begin
|
991 |
{$IFDEF DEBUG}writeln('Read Thread Starts');{$ENDIF}
|
992 |
{ Place thread code here }
|
993 |
while (not Terminated) and (not bDone) do
|
994 |
begin
|
995 |
ReadSQLData;
|
996 |
if (st.FMsg <> '') and
|
997 |
not ((st.FMsg = ' ') and (st.FDataType = tfMisc)) then
|
998 |
begin
|
999 |
{$IFDEF DEBUG}writeln('Sending Message to Monitors');{$ENDIF}
|
1000 |
if not Terminated then
|
1001 |
Synchronize(AlertMonitors);
|
1002 |
end;
|
1003 |
end;
|
1004 |
{$IFDEF DEBUG}writeln('Read Thread Ends');{$ENDIF}
|
1005 |
end;
|
1006 |
|
1007 |
procedure TReaderThread.ReadSQLData;
|
1008 |
begin
|
1009 |
st.FMsg := '';
|
1010 |
BeginRead;
|
1011 |
if not bDone then
|
1012 |
try
|
1013 |
FIPCInterface.ReceiveTrace(st);
|
1014 |
{$IFDEF DEBUG}writeln('Msg No. ',st.FMsgNumber,' received');{$ENDIF}
|
1015 |
{ if st.FMsgNumber < FReadCount then
|
1016 |
FReadCount := 0
|
1017 |
else
|
1018 |
if st.FMsgNumber <> FReadCount then
|
1019 |
IBError(ibxeMissedRead,[st.FMsgNumber,FReadCount]);}
|
1020 |
Inc(FReadCount);
|
1021 |
finally
|
1022 |
EndRead;
|
1023 |
end;
|
1024 |
end;
|
1025 |
|
1026 |
procedure TReaderThread.RemoveMonitor(Arg: TIBCustomSQLMonitor);
|
1027 |
begin
|
1028 |
FCriticalSection.Enter;
|
1029 |
try
|
1030 |
FMonitors.Remove(Arg);
|
1031 |
finally
|
1032 |
FCriticalSection.Leave
|
1033 |
end;
|
1034 |
end;
|
1035 |
|
1036 |
{ Misc methods }
|
1037 |
|
1038 |
function MonitorHook: IIBSQLMonitorHook;
|
1039 |
begin
|
1040 |
if (_MonitorHook = nil) and (not bDone) then
|
1041 |
begin
|
1042 |
CS.Enter;
|
1043 |
if (_MonitorHook = nil) and (not bDone) then
|
1044 |
begin
|
1045 |
_MonitorHook := TIBSQLMonitorHook.Create;
|
1046 |
_MonitorHook._AddRef;
|
1047 |
end;
|
1048 |
CS.Leave;
|
1049 |
end;
|
1050 |
result := _MonitorHook;
|
1051 |
end;
|
1052 |
|
1053 |
procedure EnableMonitoring;
|
1054 |
begin
|
1055 |
if assigned(FWriterThread) then
|
1056 |
FWriterThread.FWriteCount := 0;
|
1057 |
MonitorHook.Enabled := True;
|
1058 |
end;
|
1059 |
|
1060 |
procedure DisableMonitoring;
|
1061 |
begin
|
1062 |
MonitorHook.Enabled := False;
|
1063 |
end;
|
1064 |
|
1065 |
function MonitoringEnabled: Boolean;
|
1066 |
begin
|
1067 |
result := MonitorHook.Enabled;
|
1068 |
end;
|
1069 |
|
1070 |
procedure CloseThreads;
|
1071 |
begin
|
1072 |
{$IFDEF DEBUG}writeln('Closed Threads Called');{$ENDIF}
|
1073 |
if Assigned(FReaderThread) then
|
1074 |
begin
|
1075 |
FReaderThread.Terminate;
|
1076 |
FReaderThread.WaitFor;
|
1077 |
FreeAndNil(FReaderThread);
|
1078 |
end;
|
1079 |
if Assigned(FWriterThread) then
|
1080 |
begin
|
1081 |
FWriterThread.Terminate;
|
1082 |
FWriterThread.WaitFor;
|
1083 |
FreeAndNil(FWriterThread);
|
1084 |
end;
|
1085 |
end;
|
1086 |
|
1087 |
initialization
|
1088 |
CS := TCriticalSection.Create;
|
1089 |
_MonitorHook := nil;
|
1090 |
FWriterThread := nil;
|
1091 |
FReaderThread := nil;
|
1092 |
bDone := False;
|
1093 |
|
1094 |
finalization
|
1095 |
{$IFDEF DEBUG}writeln('Entered Finalisation');{$ENDIF}
|
1096 |
try
|
1097 |
{ Write an empty string to force the reader to unlock during termination }
|
1098 |
bDone := True;
|
1099 |
if Assigned(_MonitorHook) then
|
1100 |
_MonitorHook.ForceRelease;
|
1101 |
CloseThreads;
|
1102 |
if Assigned(_MonitorHook) then
|
1103 |
_MonitorHook._Release;
|
1104 |
|
1105 |
finally
|
1106 |
_MonitorHook := nil;
|
1107 |
if assigned(CS) then CS.Free;
|
1108 |
end;
|
1109 |
end.
|