npipe.cpp

这是c++编程方面的名著的例子代码

// This program demonstrates the use
// of named pipes for interprocess
// communication.  This process acts as the
// server.

#define INCL_DOSNMPIPES
#define INCL_DOSPROCESS
#include <os2.h>
#include <fstream.h>
#include <string.h>


const int PipeSz = 256;
char PipeName[40] = "";
char Buffer[PipeSz] = "";
HFILE PipeHandle;
unsigned long PipeMode;
unsigned long OMode;
unsigned long Duration;
unsigned long NumBytes;
unsigned long NumBytesRead;
char Problem[PipeSz];
RESULTCODES Result;

void main(void)
{

     OMode = NP_ACCESS_DUPLEX;
     PipeMode = NP_WMESG | NP_RMESG | 0x01;
     Duration = 20000;
     strcpy(PipeName,"\\PIPE\\PIPE1");
     DosCreateNPipe(PipeName,&PipeHandle,OMode,PipeMode,255,255,Duration);
     DosExecPgm(Problem,PipeSz,EXEC_ASYNC,NULL,NULL,&Result,"CLNPIPE.exe");
     DosConnectNPipe(PipeHandle);
     DosWrite(PipeHandle,"5",1,&NumBytes);
     DosWrite(PipeHandle,"4",1,&NumBytes);
     DosRead(PipeHandle,Buffer,1,&NumBytesRead);
     cout << "Server Read: " << Buffer << endl;
     DosRead(PipeHandle,Buffer,1,&NumBytesRead);
     cout << "Server Read: " << Buffer << endl;
     DosClose(PipeHandle);

}