Examples of com.sun.jna.Memory.clear()

com.sun.jna.Memory.clear()
Zero the full extent of this memory region.

          // now get the data
          int cbBufSize = pcbBytesNeeded.getValue();
          if (cbBufSize > 8192)
            cbBufSize = 8192;
          Memory buffer = new Memory(cbBufSize);
          buffer.clear();
          if (advapi32.QueryServiceConfig(service, buffer, cbBufSize, pcbBytesNeeded))
          {
            QUERY_SERVICE_CONFIG lpServiceConfig = new QUERY_SERVICE_CONFIG();
            lpServiceConfig.init(buffer);
            if (lpServiceConfig.dwStartType == Advapi32.SERVICE_DISABLED)

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        if (!advapi32.QueryServiceStatusEx(service, (byte) advapi32.SC_STATUS_PROCESS_INFO, null, 0, pcbBytesNeeded))
        {
          // now get the data
          int cbBufSize = pcbBytesNeeded.getValue();
          Memory buffer = new Memory(cbBufSize);
          buffer.clear();
          if (advapi32.QueryServiceStatusEx(service, (byte) advapi32.SC_STATUS_PROCESS_INFO, buffer, cbBufSize, pcbBytesNeeded))
          {
            SERVICE_STATUS_PROCESS lpBuffer = new SERVICE_STATUS_PROCESS();
            lpBuffer.init(buffer);
            if (lpBuffer.dwCurrentState == advapi32.SERVICE_RUNNING)

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      // EnumServicesStatus should need more memory space
      if ((!retVal) || err == WINERROR.ERROR_MORE_DATA)
      {
        int bytesCount = bytesNeeded.getValue();
        service_data = new Memory(bytesCount);
        service_data.clear();
        service_data_size = bytesCount;
        // System.out.println(resumeHandle.getValue());
        resumeHandle.setValue(0);
        retVal = Advapi32.INSTANCE.EnumServicesStatusExW(sc, infoLevel, srvType, srvState, service_data, service_data_size, bytesNeeded,
            srvCount, resumeHandle, null);

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    String send = "Hello World";
    int tlen = send.getBytes().length;


    int[] txn = { 0 };
    Memory txm = new Memory(tlen + 1);
    txm.clear();
    txm.write(0, send.getBytes(), 0, tlen);


    int[] rxn = { 0 };
    Memory rxm = new Memory(tlen);

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      boolean succeded = Advapi32.INSTANCE.GetFileSecurity(new WString(
          fileName), infoType, memory, nLength, lpnSize);


      if (!succeded) {
        int lastError = Kernel32.INSTANCE.GetLastError();
        memory.clear();
        if (W32Errors.ERROR_INSUFFICIENT_BUFFER != lastError) {
          throw new Win32Exception(lastError);
        }
      }
      int lengthNeeded = lpnSize.getValue();

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      }
      int lengthNeeded = lpnSize.getValue();
      if (nLength < lengthNeeded) {
        repeat = true;
        nLength = lengthNeeded;
        memory.clear();
      }
    } while (repeat);


    SECURITY_DESCRIPTOR_RELATIVE sdr = new WinNT.SECURITY_DESCRIPTOR_RELATIVE(
        memory);

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      }
    } while (repeat);


    SECURITY_DESCRIPTOR_RELATIVE sdr = new WinNT.SECURITY_DESCRIPTOR_RELATIVE(
        memory);
    memory.clear();
    ACL dacl = sdr.getDiscretionaryACL();
    ACCESS_ACEStructure[] aceStructures = dacl.getACEStructures();


    if (compact) {
      Map<String, ACCESS_ACEStructure> aceMap = new HashMap<String, ACCESS_ACEStructure>();

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        final Memory securityDescriptorMemoryPointer = new Memory(nLength);
        succeeded = Advapi32.INSTANCE.GetFileSecurity(new WString(
                absoluteFilePath), infoType, securityDescriptorMemoryPointer, nLength, lpnSize);


        if (!succeeded) {
            securityDescriptorMemoryPointer.clear();
            throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
        }


        return securityDescriptorMemoryPointer;
    }

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            if(duplicatedToken != null && duplicatedToken.getValue() != null) {
                Kernel32.INSTANCE.CloseHandle(duplicatedToken.getValue());
            }


            if(securityDescriptorMemoryPointer != null) {
                securityDescriptorMemoryPointer.clear();
            }
        }


        return hasAccess;
    }

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    ipaddr.bytes = subject.getAddress().getAddress();


    int sendDataSize = 56;
    int replyDataSize = sendDataSize + (new IcmpEchoReply().size()) + 10;
    Pointer sendData = new Memory(sendDataSize);
    sendData.clear(sendDataSize);
    Pointer replyData = new Memory(replyDataSize);


    PingResult result = new PingResult(subject.getAddress());
    try {
      for (int i = 1; i <= count && !currentThread().isInterrupted(); i++) {

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