在ubuntu中等效於kernel32.dll？

Question

嗨，我已經在Windows環境下的c3和cpp中開發了示例應用程序。 該應用程序實現了這些程序之間的命名管道進行通信。 我的cpp程序中有[DllImport("kernel32.dll", SetLastError = true)]命令。 當我編譯我的C＃Progaram時，出現以下錯誤。

Enter the message
Unhandled Exception: Unhandled Exception: System.DllNotFoundException: Unable to load DLL 'kernel32.dll': The specified module or one of its dependencies could not be found.
 (Exception from HRESULT: 0x8007007E)
   at consoleapp.NamedPipeServer.CreateNamedPipe(String pipeName, UInt32 dwOpenMode, UInt32 dwPipeMode, UInt32 nMaxInstances, UInt32 nOutBufferSize, UInt32 nInBufferSize, UInt32 nDefaultTimeOut, IntPtr lpSecurityAttributes)
   at consoleapp.NamedPipeServer.ListenForClients() in /home/niranjan/consoleapp/NamedPipeServer.cs:line 66
   at System.Threading.Thread.ThreadMain_ThreadStart()
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)System.DllNotFoundException: Unable to load DLL 'kernel32.dll': The specified module or one of its dependencies could not be found.
 (Exception from HRESULT: 0x8007007E)
   at consoleapp.NamedPipeServer.CreateNamedPipe(String pipeName, UInt32 dwOpenMode, UInt32 dwPipeMode, UInt32 nMaxInstances, UInt32 nOutBufferSize, UInt32 nInBufferSize, UInt32 nDefaultTimeOut, IntPtr lpSecurityAttributes)
   at consoleapp.NamedPipeServer.ListenForClients() in /home/niranjan/consoleapp/NamedPipeServer.cs:line 66
   at System.Threading.Thread.ThreadMain_ThreadStart()
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

以下是我的C＃文件。 我已經在ubuntu中創建了.Net core（2.0）控制台應用程序。 Program.cs中

using System;

namespace consoleapp
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            NamedPipeServer PServer1 = new NamedPipeServer(@"\\.\pipe\myNamedPipe1",0);
            NamedPipeServer PServer2 = new NamedPipeServer(@"\\.\pipe\myNamedPipe2",1);

            PServer1.Start();
            PServer2.Start();

            string Ms="Start";
            do
            {
                Console.WriteLine("Enter the message");
                Ms = Console.ReadLine();
                PServer2.SendMessage(Ms, PServer2.clientse);
            } while (Ms != "quit");

            PServer1.StopServer();
            PServer2.StopServer();
        }
    }
}

以下是我的NamedPipeServer.cs

using System;
using Microsoft.Win32.SafeHandles;
using System.Text;
using System.Runtime.InteropServices;
using System.Threading;
using System.IO;

namespace consoleapp
{
    public class NamedPipeServer
    {
        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern SafeFileHandle CreateNamedPipe(
           String pipeName,
           uint dwOpenMode,
           uint dwPipeMode,
           uint nMaxInstances,
           uint nOutBufferSize,
           uint nInBufferSize,
           uint nDefaultTimeOut,
           IntPtr lpSecurityAttributes);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern int ConnectNamedPipe(
           SafeFileHandle hNamedPipe,
           IntPtr lpOverlapped);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern int DisconnectNamedPipe(
           SafeFileHandle hNamedPipe);

        public const uint DUPLEX = (0x00000003);
        public const uint FILE_FLAG_OVERLAPPED = (0x40000000);

        public class Client
        {
            public SafeFileHandle handle;
            public FileStream stream;
        }

        public const int BUFFER_SIZE = 100;
        public Client clientse =null;

        public string pipeName;
        Thread listenThread;
        SafeFileHandle clientHandle;
        public int ClientType;

        public NamedPipeServer(string PName,int Mode)
        {
            pipeName = PName;
            ClientType = Mode;//0 Reading Pipe, 1 Writing Pipe

        }

        public void Start()
        {
            this.listenThread = new Thread(new ThreadStart(ListenForClients));
            this.listenThread.Start();
        }
        private void ListenForClients()
        {
            while (true)
            {

                clientHandle =CreateNamedPipe(this.pipeName,DUPLEX | FILE_FLAG_OVERLAPPED,0,255,BUFFER_SIZE,BUFFER_SIZE,0,IntPtr.Zero);

                //could not create named pipe
                if (clientHandle.IsInvalid)
                    return;

                int success = ConnectNamedPipe(clientHandle, IntPtr.Zero);

                //could not connect client
                if (success == 0)
                    return;

                clientse = new Client();
                clientse.handle = clientHandle;
                clientse.stream = new FileStream(clientse.handle, FileAccess.ReadWrite, BUFFER_SIZE, true);

                if (ClientType == 0)
                {
                    Thread readThread = new Thread(new ThreadStart(Read));
                    readThread.Start();
                }
            }
        }
        private void Read()
        {
            //Client client = (Client)clientObj;
            //clientse.stream = new FileStream(clientse.handle, FileAccess.ReadWrite, BUFFER_SIZE, true);
            byte[] buffer = null;
            ASCIIEncoding encoder = new ASCIIEncoding();

            while (true)
            {

                int bytesRead = 0;

                try
                {
                    buffer = new byte[BUFFER_SIZE];
                    bytesRead = clientse.stream.Read(buffer, 0, BUFFER_SIZE);
                }
                catch
                {
                    //read error has occurred
                    break;
                }

                //client has disconnected
                if (bytesRead == 0)
                    break;

                //fire message received event
                //if (this.MessageReceived != null)
                //    this.MessageReceived(clientse, encoder.GetString(buffer, 0, bytesRead));

                int ReadLength = 0;
                for (int i = 0; i < BUFFER_SIZE; i++)
                {
                    if (buffer[i].ToString("x2") != "cc")
                    {
                        ReadLength++;
                    }
                    else
                        break;
                }
                if (ReadLength > 0)
                {
                    byte[] Rc = new byte[ReadLength];
                    Buffer.BlockCopy(buffer, 0, Rc, 0, ReadLength);

                    Console.WriteLine("C# App: Received " + ReadLength +" Bytes: "+ encoder.GetString(Rc, 0, ReadLength));
                    buffer.Initialize();
                }

            }

            //clean up resources
            clientse.stream.Close();
            clientse.handle.Close();

        }
        public void SendMessage(string message, Client client)
        {

                ASCIIEncoding encoder = new ASCIIEncoding();
                byte[] messageBuffer = encoder.GetBytes(message);

                if (client.stream.CanWrite)
                {
                    client.stream.Write(messageBuffer, 0, messageBuffer.Length);
                    client.stream.Flush();
                }


        }
        public void StopServer()
        {
            //clean up resources

            DisconnectNamedPipe(this.clientHandle);


            this.listenThread.Abort();
        }

    }
}

下面是我的cpp程序。

#include <stdio.h>
#include <windows.h>

unsigned long __stdcall NET_RvThr(void * pParam) ;
DWORD WINAPI ThreadProc() ;
HANDLE hPipe1,hPipe2; 
BOOL Finished;

int main(int argc, char *argv[])
{
    //Pipe Init Data
    char buf[100];

    LPTSTR lpszPipename1 = TEXT("\\\\.\\pipe\\myNamedPipe1"); 
    LPTSTR lpszPipename2 = TEXT("\\\\.\\pipe\\myNamedPipe2"); 

    DWORD cbWritten;
    DWORD dwBytesToWrite = (DWORD)strlen(buf);

    //Thread Init Data
    DWORD threadId;
    HANDLE hThread = NULL;

    BOOL Write_St=TRUE;

    Finished=FALSE;




    hPipe1=CreateFile(lpszPipename1,    GENERIC_WRITE ,0,NULL,OPEN_EXISTING,FILE_FLAG_OVERLAPPED,NULL);
    hPipe2=CreateFile(lpszPipename2,    GENERIC_READ ,0,NULL,OPEN_EXISTING,FILE_FLAG_OVERLAPPED,NULL);


     if ((hPipe1 == NULL || hPipe1 == INVALID_HANDLE_VALUE)||(hPipe2 == NULL || hPipe2 == INVALID_HANDLE_VALUE))
    { 
        printf("Could not open the pipe  - (error %d)\n",GetLastError());

    }
     else
     {

         hThread = CreateThread( NULL, 0, &NET_RvThr, NULL, 0, NULL);
         do
         {
             printf ("Enter your message: ");
             scanf ("%s",buf);  
             if (strcmp (buf,"quit") == 0)
                Write_St=FALSE;
             else
             {
                WriteFile(hPipe1, buf, dwBytesToWrite, &cbWritten, NULL);
                memset(buf,0xCC,100);

             }

        }while(Write_St);

        CloseHandle(hPipe1);
        CloseHandle(hPipe2);
        Finished=TRUE;
     }

     getchar();


}
unsigned long __stdcall NET_RvThr(void * pParam) {
    BOOL fSuccess; 
    char chBuf[100];
    DWORD dwBytesToWrite = (DWORD)strlen(chBuf);
    DWORD cbRead;
    int i;

    while(1)
    {
        fSuccess =ReadFile( hPipe2,chBuf,dwBytesToWrite,&cbRead, NULL); 
        if(fSuccess)
        {
            printf("C++ App: Received %d Bytes : ",cbRead);
            for(i=0;i<cbRead;i++)
                printf("%c",chBuf[i]);
            printf("\n");
        }
        if (! fSuccess && GetLastError() != ERROR_MORE_DATA) 
        {
            printf("Can't Read\n");
            if(Finished)
                break;
        }
    }
}

我試圖找出等效於kernal32.dll的ubuntu。 有人可以幫我解決這個問題嗎？ 任何幫助將不勝感激。 謝謝。

Answer 1

在Ubuntu中等效於kernel32.dll？

Kernel32.dll是Windows特定的庫。 在其他操作系統（如Ubuntu）上，您將找不到它（除非您使用某些仿真層，如Wine）。 因此，您不能在Ubuntu上使用特定於平台的代碼。

那么，如何以獨立於平台的方式使用命名管道？

幸運的是，.NET Framework設計人員為您解決了該問題：.NET Core 2.0包含System.IO.Pipes命名空間 ，該命名空間包含用於通過命名管道進行進程間通信的托管包裝。