examples/CBuilder/exmmfcu.cpp

// ***** BEGIN LICENSE BLOCK *****
// * Version: MPL 1.1
// *
// * The contents of this file are subject to the Mozilla Public License Version
// * 1.1 (the "License"); you may not use this file except in compliance with
// * the License. You may obtain a copy of the License at
// * http://www.mozilla.org/MPL/
// *
// * Software distributed under the License is distributed on an "AS IS" basis,
// * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
// * for the specific language governing rights and limitations under the
// * License.
// *
// * The Original Code is TurboPower SysTools
// *
// * The Initial Developer of the Original Code is
// * TurboPower Software
// *
// * Portions created by the Initial Developer are Copyright (C) 1996-2002
// * the Initial Developer. All Rights Reserved.
// *
// * Contributor(s):
// *
// * ***** END LICENSE BLOCK *****
//---------------------------------------------------------------------------
#include <vcl\vcl.h>
#pragma hdrstop

#include "exmmfcu.h"
#pragma link "ststrms"
//---------------------------------------------------------------------------
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::btnOpenMMFClick(TObject *Sender)
{
  try {
    AMMFile = new TStMemoryMappedFile("", 100, false, true);
    btnOpenMMF->Enabled  = false;
    btnCloseMMF->Enabled = true;
    Timer1->Enabled      = true;
    Label1->Caption      = "Waiting: ";
  }
  catch (...) {
    ShowMessage("Unable to open file");
  }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::btnCloseMMFClick(TObject *Sender)
{
  delete AMMFile;
  AMMFile = NULL;

  btnOpenMMF->Enabled  = true;
  btnCloseMMF->Enabled = false;
  Timer1->Enabled = false;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
  Label1->Caption = "Seeking: " + IntToStr(AMMFile->DataSize);
  Timer1->Enabled = false;
  AMMFile->Seek(0, soFromBeginning);
  AMMFile->Read(Buf, AMMFile->DataSize);
  Edit1->Text = StrPas(Buf);
  Timer1->Enabled = true;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
{
  delete AMMFile;
  AMMFile = NULL;
}
//---------------------------------------------------------------------------
1	// *** BEGIN LICENSE BLOCK ***
2	// * Version: MPL 1.1
3	// *
4	// * The contents of this file are subject to the Mozilla Public License Version
5	// * 1.1 (the "License"); you may not use this file except in compliance with
6	// * the License. You may obtain a copy of the License at
7	// * http://www.mozilla.org/MPL/
8	// *
9	// * Software distributed under the License is distributed on an "AS IS" basis,
10	// * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11	// * for the specific language governing rights and limitations under the
12	// * License.
13	// *
14	// * The Original Code is TurboPower SysTools
15	// *
16	// * The Initial Developer of the Original Code is
17	// * TurboPower Software
18	// *
19	// * Portions created by the Initial Developer are Copyright (C) 1996-2002
20	// * the Initial Developer. All Rights Reserved.
21	// *
22	// * Contributor(s):
23	// *
24	// * *** END LICENSE BLOCK ***
25	//---------------------------------------------------------------------------
26	#include <vcl\vcl.h>
27	#pragma hdrstop
28
29	#include "exmmfcu.h"
30	#pragma link "ststrms"
31	//---------------------------------------------------------------------------
32	#pragma resource "*.dfm"
33	TForm1 *Form1;
34	//---------------------------------------------------------------------------
35	__fastcall TForm1::TForm1(TComponent* Owner)
36	: TForm(Owner)
37	{
38	}
39	//---------------------------------------------------------------------------
40	void __fastcall TForm1::btnOpenMMFClick(TObject *Sender)
41	{
42	try {
43	AMMFile = new TStMemoryMappedFile("", 100, false, true);
44	btnOpenMMF->Enabled = false;
45	btnCloseMMF->Enabled = true;
46	Timer1->Enabled = true;
47	Label1->Caption = "Waiting: ";
48	}
49	catch (...) {
50	ShowMessage("Unable to open file");
51	}
52	}
53	//---------------------------------------------------------------------------
54	void __fastcall TForm1::btnCloseMMFClick(TObject *Sender)
55	{
56	delete AMMFile;
57	AMMFile = NULL;
58
59	btnOpenMMF->Enabled = true;
60	btnCloseMMF->Enabled = false;
61	Timer1->Enabled = false;
62	}
63	//---------------------------------------------------------------------------
64	void __fastcall TForm1::Timer1Timer(TObject *Sender)
65	{
66	Label1->Caption = "Seeking: " + IntToStr(AMMFile->DataSize);
67	Timer1->Enabled = false;
68	AMMFile->Seek(0, soFromBeginning);
69	AMMFile->Read(Buf, AMMFile->DataSize);
70	Edit1->Text = StrPas(Buf);
71	Timer1->Enabled = true;
72	}
73	//---------------------------------------------------------------------------
74	void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
75	{
76	delete AMMFile;
77	AMMFile = NULL;
78	}
79	//---------------------------------------------------------------------------