-. , -, ++. C++ Microsoft , -. : <stdio.h>, <iostream.h> <conio.h>. -, <stdio.h>, - :
stdin ;
stdout ;
stderr . - . -, <iostream.h>, - - cin, cout, cerr. - ++. , - , hStdInput, hStdOutput hStdError STARTUPINFO. , , -. -.
-, <conio.h>, - , . - -.
, - , -. : , , , STARTUPINFO. , .
// ,
// -.
// STARTUPINFO.
#include <windows.h> #include <conio.h> #include <iostream.h>
int main() {
//
HANDLE hReadFloat, hReadText;
char lpszReadFloat[] = "ReadFloat";
char lpszReadText[] = "ReadText";
// hReadFloat = CreateEvent(NULL, FALSE, FALSE, lpszReadFloat); hReadText = CreateEvent(NULL, FALSE, FALSE, lpszReadText);
// _cputs("Press any key to start communication.\n"); _getch();
|
|
|
// for (int i = 0; i < 5; ++i) {
Sleep(500); cout << i << endl;
}
// WaitForSingleObject(hReadFloat, INFINITE);
// for (int j = 0; j < 5; ++j) {
float nData;
cin >> nData;
_cprintf("The number %2.1f is read from the pipe.\n", nData);
}
}
// , SetEvent(hReadText);
// cout << "This is a demo sentence." << endl;
// cout << '\0' << endl;
_cputs("The process finished transmission of data.\n");
_cputs("Press any key to exit.\n");
_getch();
CloseHandle(hReadFloat); CloseHandle(hReadText);
return 0;
5. .
// -.
// STARTUPINFO.
#include <windows.h> #include <conio.h> #include <iostream.h>
int main() {
// HANDLE hReadFloat, hReadText; char lpszReadFloat[] = "ReadFloat"; char lpszReadText[] = "ReadText";
// hReadFloat = CreateEvent(NULL, FALSE, FALSE, lpszReadFloat); hReadText = CreateEvent(NULL, FALSE, FALSE, lpszReadText);
// for (int i = 0; i < 5; ++i) {
int nData;
cin >> nData;
_cprintf("The number %d is read from the pipe.\n", nData); }
// SetEvent(hReadFloat);
//
for (int j = 0; j < 5; ++j)
}
{
Sleep(500);
cout << (j*0.1) << endl; }
//
WaitForSingleObject(hReadText, INFINITE);
_cputs("The process read the text: ");
// char lpszInput[80]; do {
Sleep(500);
cin >> lpszInput;
_cputs(lpszInput);
_cputs(" ");
}
while (*lpszInput!= '\0');
_cputs("\nThe process finished transmission of data.\n");
_cputs("Press any key to exit.\n");
_getch();
CloseHandle(hReadFloat); CloseHandle(hReadText);
return 0;
, . .
6. .
// ,
// , .
// STARTUPINFO.
#include <windows.h> #include <conio.h>
int main() {
char lpszComLine1[80] = "C:\\Client1.exe"; //
char lpszComLine2[80] = "C:\\Client2.exe"; //
STARTUPINFO si; PROCESS_INFORMATION pi; HANDLE hWritePipe, hReadPipe; SECURITY_ATTRIBUTES sa;
//
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL; //
sa.bInheritHandle = TRUE; //
|
|
|
// if(!CreatePipe(
&hReadPipe, //
&hWritePipe, //
&sa, // ,
//
0)) //
{
_cputs("Create pipe failed.\n"); _cputs("Press any key to finish.\n"); _getch();
return GetLastError(); }
// ZeroMemory(&si, sizeof(STARTUPINFO)); si.cb = sizeof(STARTUPINFO);
// si.dwFlags = STARTF_USESTDHANDLES;
// si.hStdInput = hReadPipe; si.hStdOutput = hWritePipe; si.hStdError = hWritePipe;
// if (!CreateProcess(
NULL, //
lpszComLine1, //
NULL, //
NULL, //
TRUE, //
//
CREATE_NEW_CONSOLE, //
NULL, //
NULL, //
&si, // -
&pi //
// )) {
_cputs("Create process failed.\n"); _cputs("Press any key to finish.\n"); _getch();
return GetLastError(); }
// CloseHandle(pi.hProcess); CloseHandle(pi.hThread);
// if (!CreateProcess(
NULL, //
lpszComLine2, //
NULL, //
NULL, //
TRUE, //
//
CREATE_NEW_CONSOLE, //
NULL, //
NULL, //
&si, // -
&pi //
// )
) {
_cputs("Create process failed.\n");
_cputs("Press any key to finish.\n");
_getch();
return GetLastError(); }
// CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
//
CloseHandle(hReadPipe);
CloseHandle(hWritePipe);
_cputs("The clients are created.\n");
_cputs("Press any key to exit.\n");
_getch();
return 0; }
1. , .
2. , , .
3. , .
4. .
1. Server Client, .
:
1. ;
2. .
.
- Server, .
− .
− .
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− . G .
|
|
|
− , .
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− -.
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− .
− .
− .
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.
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− .
− .
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.
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1. ;
2. .
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.
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− .
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.
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1. ;
2. .
.
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− . .
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− .
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1. ;
2. .
.
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− .
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− ;
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− .
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− .
- .
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1. ;
2. .
.
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− .
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− . .
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− . .
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− -.
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− .
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− . .
10. Server Client, Figure . :
1. ;
2. ,
.
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- .
− ;
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− -.
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.
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1. .
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3. .
4. ?
7
:
:
1. Windows.
2. .
3. , .
1.
. , , , .
- CreateNamedPipe, :
HANDLE CreateNamedPipe (
LPCTSTR lpName, //
DWORD dwOpenMode, //
DWORD dwPipeMode, //
DWORD nMaxInstances, //
DWORD nOutBufferSize, //
DWORD nInBufferSize, //
DWORD nDefaultTimeOut, //
LPSECURITY_ATTRIBUTES lpPipeAttributes //
);
.
lpName , :
\\.\pipe\<pipe_name>
(.) , , pipe - , <pipe_name> , .
dwOpenMode , , , . :
PIPE_ACCESS_DUPLEX ,
PIPE_ACCESS_INBOUND , ,
PIPE_ACCESS_OUTBOUND , .
, , . :
FILE_FLAG_WRITE_THROUGH .
FILE_FLAG_OVERLAPPED .
. .
dwPipeMode , . :
PIPE_TYPE_BYTE ,
PIPE_TYPE_MESSAGE .
PYPE_READMODE_BYTE ,
PYPE_READMODE_MESSAGE .
. . :
PIPE_WAIT ,
PIPE_NOWAIT .
.
nMaxInstances , 1 PIPE_UNLIMITED_INSTANCES.
nOutBufferSize nInBufferSize . , Windows , .
nDefaultTimeOut , WaitNamedPipe, .
CreateNamedPipe , - :
INVALID_HANDLE_VALUE ,
ERROR_INVALID_PARAMETR nMaxInstances ,
PIPE_UNLIMITED_INSTANCES.
. CreateNamedPipe, . .
2.
, , .
BOOL ConnectNamedPipe (
HANDLE hNamedPipe, //
LPOVERLAPPED lpOverlapped //
);
TRUE FALSE . .
,
BOOL DisconnectNamedPipe (
HANDLE hNamedPipe //
);
TRUE FALSE . . . , ConnectNamedPipe, .
3.
, - . :
BOOL WaitNamedPipe (
LPCTSTR lpNamedPipeName, //
DWORD nTimeOut //
);
TRUE, - FALSE. .
lpNamedPipeName ,
\\<server_name>\pipe\<pipe_name>
<server_name> , .
nTimeOut . :
NMPWAIT_USE_DEFAULT_WAIT nDefaultTimeOut, CreateNamedPipe,
NMPWAIT_WAIT_FOREVER .
WaitNamedPipe. -, lpNamedPipe, , , nTimeOut. -, ConnectNamedPipe, WaitNamedPipe FALSE GetLastError ERROR_PIPE_CONNECTED. WaitNamedPipe ConnectNamedPipe.
,
HANDLE CreateFile (
LPCTSTR lpFileName, //
DWORD dwDesiredAccess, //
DWORD dwShareMode, //
LPSECURITY_ATTRIBUTES lpSecurity Attributes, // DWORD dwCreationDisposition, //
DWORD dwFlagsAndAttributes, //
HANDLE hTemplateFile //
);
, - INVALID_HANDLE_VALUE.
CreateFile , .
lpFileName , , WaitNamedPipe.
dwDesiredAccess :
0 ,
GENERIC_READ ,
GENERIC_WRITE .
, CreateFile , , , dwOpenMode CreateNamedPipe. , . MSDN.
dwShareMode 0, :
FILE_SHARE_READ ,
FILE_SHARE_WRITE .
lpSecurityAttributes .
dwCreationDisposition OPEN_EXISTING, .
dwFlagsAndAttributes 0, . MSDN.
hTemplateFile NULL.
CreateFile . -, , WaitNamedPipe , CreateFile :
,
.
ConnectNamedPipe . -, , ConnectNamedPipe, CreateFile WaitNamedPipe.
, , CreateFile :
\\.\pipe\<pipe_name>
(NPFS) . , :
\\<server_name>\pipe\<pipe_name>
, . , ConnectNamedPipe, , , . . , ConnectNamedPipe . .
4.
:
GetNamedPipeHandleState;
GetNamedPipeInfo;
5.
SetNamedPipeHandleState;
6.
, ReadFile WriteFile, , . , ReadFile WriteFile lpOverlapped , CreateNamedPipe dwOpenMode FILE_FLAG_OVERLAPPED.
- ReadFileEx WriteFileEx, .
PeekNamedPipe, , . :
PeekNamedPipe
TransactNamedPipe, () :
T ransactNamedPipe
ReadFile WriteFile. , TransactNamedPipe , PIPE_TYPE_MESSAGE PIPE_READMODE_MESSAGE.
CallNamedPipe.
, , CloseHandle.
7.
, - , , . . - .
1. .
#include <windows.h>
#include <iostream.h>
int main()
{
char c; //
HANDLE hNamedPipe;
// hNamedPipe=CreateNamedPipe(
"\\\\.\\pipe\\demo_pipe", //
PIPE_ACCESS_INBOUND, //
PIPE_TYPE_MESSAGE | PIPE_WAIT, // 1, //
0, //
0, //
INFINITE, // (LPSECURITY_ATTRIBUTES)NULL //
);
// if (hNamedPipe==INVALID_HANDLE_VALUE)
{
cerr << "Creation of the named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl; cout << "Press any char to finish server: "; cin >> c; return 0;
}
// cout << "The server is waiting for connection with a client." << endl; if(!ConnectNamedPipe(
hNamedPipe, //
(LPOVERLAPPED)NULL //
))
{
cerr << "The connection failed." << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any char to finish the server: ";
cin >> c;
return 0;
}
// for (int i=0; i<10; i++)
{
int nData;
DWORD dwBytesRead; if (!ReadFile(
hNamedPipe, //
&nData, //
sizeof(nData), //
&dwBytesRead, //
(LPOVERLAPPED)NULL //
))
{
cerr << "Data reading from the named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any char to finish the server: ";
cin >> c;
return 0;
}
// cout << "The number " << nData << " was read by the server" << endl;
}
// CloseHandle(hNamedPipe);
//
cout << "The data are read by the server."<<endl; cout << "Press any char to finish the server: "; cin >> c; return 0;
}
, , .
2. .
#include <windows.h>
#include <iostream.h>
int main()
{
char c; //
HANDLE hNamedPipe;
char pipeName[] = "\\\\.\\pipe\\demo_pipe";
// hNamedPipe = CreateFile(
pipeName, //
GENERIC_WRITE, //
FILE_SHARE_READ, //
(LPSECURITY_ATTRIBUTES) NULL, // OPEN_EXISTING, //
0, //
(HANDLE)NULL //
);
// if (hNamedPipe == INVALID_HANDLE_VALUE)
{
cerr << "Connection with the named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl; cout << "Press any char to finish the client: "; cin >> c; return 0;
}
// for (int i=0; i<10; i++)
{
DWORD dwBytesWritten; if (!WriteFile(
hNamedPipe, //
&i, //
sizeof(i), //
&dwBytes Written, //
(LPOVERLAPPED)NULL //
))
{
//
cerr << "Writing to the named pipe failed: " << endl
<< "The last error code: " << GetLastError() << endl; cout << "Press any char to finish the client: "; cin >> c;
CloseHandle(hNamedPipe); return 0;
}
//
cout << "The number " << i << " is written to the named pipe." << endl;
Sleep(1000);
}
// CloseHandle(hNamedPipe);
//
cout << "The data are written by the client." << endl << "Press any char to finish the client: ";
cin >> c; return 0;
}
, , . , .
3. .
// .
// : // , .
#include <windows.h>
#include <iostream.h>
int main()
{
char c; //
HANDLE hNamedPipe;
char lpszInMessage[80]; //
DWORD dwBytesRead; //
char lpszOutMessage[] = "The server has received a message."; // DWORD dwBytesWrite; //
// hNamedPipe = CreateNamedPipe(
"V\WV\pipeV\demo_pipe", //
PIPE_ACCESS_DUPLEX, //
PIPE_TYPE_MESSAGE | PIPE_WAIT, // 1, //
0, //
0, //
INFINITE, // 500 (LPSECURITY_ATTRIBUTES)NULL //
);
// if (hNamedPipe == INVALID_HANDLE_VALUE)
{
cerr << "Creation of the named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl; cout << "Press any char to finish server: "; cin >> c; return 0;
}
// , cout << "The server is waiting for connection with a client." << endl; if(!ConnectNamedPipe(
hNamedPipe, //
(LPOVERLAPPED)NULL //
))
{
cerr << "The connection failed." << endl
<< "The last error code: "<<GetLastError() << endl; CloseHandle(hNamedPipe); cout << "Press any char to finish the server: "; cin >> c; return 0;
}
// if (!ReadFile(
hNamedPipe, //
lpszInMessage, //
sizeof(lpszInMessage), //
&dwBytesRead, //
(LPOVERLAPPED)NULL //
))
{
cerr << "Data reading from the named pipe failed." << endl << "The last error code: "<< GetLastErrorO << endl; CloseHandle(hNamedPipe); cout << "Press any char to finish the server: "; cin >> c; return 0;
}
// cout << "The server has received the following message from a client: "
<< endl << "\t" << lpszInMessage << endl;
// if (!WriteFile(
hNamedPipe, //
lpszOutMessage, //
sizeof(lpszOutMessage), //
&dwBytesWrite, //
(LPOVERLAPPED)NULL //
))
{
cerr << "Data writing to the named pipe failed." << endl
<< "The last error code: " << GetLastError() << endl;
CloseHandle(hNamedPipe);
cout << "Press any char to finish the server: ";
cin >> c;
return 0;
}
// cout << "The server send the following message to a client: "
<< endl << "\t" << lpszOutMessage << endl;
// CloseHandle(hNamedPipe);
//
cout << "Press any char to finish the server: "; cin >> c; return 0;
}
. , , , . , , . , .
// .
// .
// // .
#include <windows.h>
#include <iostream.h>
int main()
{
char c; //
SECURITY_ATTRIBUTES sa; //
SECURITY_DESCRIPTOR sd; //
HANDLE hNamedPipe;
char lpszInMessage[80]; //
DWORD dwBytesRead; //
char lpszOutMessage[] = "The server has received a message."; // DWORD dwBytesWrite; //
// sa.nLength = sizeof(sa);
sa.bInheritHandle = FALSE; // // InitializeSecurityDescriptor(&sd,SECURITY_DESCRIPTOR_REVISION);
// , SetSecurityDescriptorDacl(&sd, TRUE, NULL, fAlSE); sa.lpSecurityDescriptor = &sd;
// hNamedPipe = CreateNamedPipe(
"\\\\.\\pipe\\demo_pipe", //
PIPE_ACCESS_DUPLEX, //
PIPE_TYPE_MESSAGE | PIPE_WAIT, // 1, //
0, //
0, //
INFINITE, // 500 &sa //
);
// if (hNamedPipe == INVALID_HANDLE_VALUE)
{
cerr << "Creation of the named pipe failed." << endl
<< "The last error code: " << GetLastErrorO << endl; cout << "Press any char to finish server: "; cin >> c; return 0;
}
// , cout << "The server is waiting for connection with a client." << endl; if(!ConnectNamedPipe(
hNamedPipe, //
(LPOVERLAPPED)NULL //
))
{
cerr &l
