C#调用C函数 out int 对应 java 数据类型 com.sun.jna.ptr.IntByReference

How to use

IntByReference

in

com.sun.jna.ptr

• IntByReference
• PointerByReference
  Represents a reference to a pointer to native data. In C notation, void**.
• LongByReference
• DoubleByReference
• NativeLongByReference

• FloatByReference,
• ByReference,
• ShortByReference

Best Java code snippets using com.sun.jna.ptr.IntByReference(Showing top 20 results out of 603)

Kernel32Utils.waitForExitProcess(...)      来源：jenkins/Kernel32Utils.java at master · jenkinsci/jenkins (github.com)

/**
 * Given the process handle, waits for its completion and returns the exit code.
 */
public static int waitForExitProcess(Pointer hProcess) throws InterruptedException {
  while (true) {
    if (Thread.interrupted())
      throw new InterruptedException();
    Kernel32.INSTANCE.WaitForSingleObject(hProcess,1000);
    IntByReference exitCode = new IntByReference();
    exitCode.setValue(-1);
    Kernel32.INSTANCE.GetExitCodeProcess(hProcess,exitCode);
    int v = exitCode.getValue();
    if (v !=Kernel32.STILL_ACTIVE) {
      return v;
    }
  }
}

ProcessTree$Darwin$DarwinProcess.parse()             来源：jenkins/ProcessTree.java at master · jenkinsci/jenkins (github.com)

 private void parse() {
        try {
// allocate them first, so that the parse error wil result in empty data
          // and avoid retry.
          arguments = new ArrayList<String>();
          envVars = new EnvVars();

          IntByReference intByRef = new IntByReference();

          IntByReference argmaxRef = new IntByReference(0);
          IntByReference size = new IntByReference(sizeOfInt);

          // for some reason, I was never able to get sysctlbyname work.
//        if(LIBC.sysctlbyname("kern.argmax", argmaxRef.getPointer(), size, NULL, _)!=0)
          if(LIBC.sysctl(new int[]{CTL_KERN,KERN_ARGMAX},2, argmaxRef.getPointer(), size, NULL, intByRef)!=0)
            throw new IOException("Failed to get kern.argmax: "+LIBC.strerror(Native.getLastError()));

          int argmax = argmaxRef.getValue();

          class StringArrayMemory extends Memory {
            private long offset=0;

            StringArrayMemory(long l) {
              super(l);
            }

            int readInt() {
              int r = getInt(offset);
              offset+=sizeOfInt;
              return r;
            }

            byte peek() {
              return getByte(offset);
            }

            String readString() {
              ByteArrayOutputStream baos = new ByteArrayOutputStream();
              byte ch;
              while((ch = getByte(offset++))!='\0')
                baos.write(ch);
              return baos.toString();
            }

            void skip0() {
              // skip padding '\0's
              while(getByte(offset)=='\0')
                offset++;
            }
          }
          StringArrayMemory m = new StringArrayMemory(argmax);
          size.setValue(argmax);
          if(LIBC.sysctl(new int[]{CTL_KERN,KERN_PROCARGS2,pid},3, m, size, NULL, intByRef)!=0)
            throw new IOException("Failed to obtain ken.procargs2: "+LIBC.strerror(Native.getLastError()));


          /*
          * Make a sysctl() call to get the raw argument space of the
            * process.  The layout is documented in start.s, which is part
            * of the Csu project.  In summary, it looks like:
            *
            * /---------------\ 0x00000000
            * :               :
            * :               :
            * |---------------|
            * | argc          |
            * |---------------|
            * | arg[0]        |
            * |---------------|
            * :               :
            * :               :
            * |---------------|
            * | arg[argc - 1] |
            * |---------------|
            * | 0             |
            * |---------------|
            * | env[0]        |
            * |---------------|
            * :               :
            * :               :
            * |---------------|
            * | env[n]        |
            * |---------------|
            * | 0             |
            * |---------------| <-- Beginning of data returned by sysctl()
            * | exec_path     |     is here.
            * |:::::::::::::::|
            * |               |
            * | String area.  |
            * |               |
            * |---------------| <-- Top of stack.
            * :               :
            * :               :
            * \---------------/ 0xffffffff
            */

          // I find the Darwin source code of the 'ps' command helpful in understanding how it does this:
          // see http://www.opensource.apple.com/source/adv_cmds/adv_cmds-147/ps/print.c
          int argc = m.readInt();
          String args0 = m.readString(); // exec path
          m.skip0();
          try {
            for( int i=0; i<argc; i++) {
              arguments.add(m.readString());
            }
          } catch (IndexOutOfBoundsException e) {
            throw new IllegalStateException("Failed to parse arguments: pid="+pid+", arg0="+args0+", arguments="+arguments+", nargs="+argc+". Please see https://jenkins.io/redirect/troubleshooting/darwin-failed-to-parse-arguments",e);
          }

          // read env vars that follow
          while(m.peek()!=0)
            envVars.addLine(m.readString());
        } catch (IOException e) {
          // this happens with insufficient permissions, so just ignore the problem.
        }
      }
    }

OpenVR.getRenderSize(...)　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c781696e70f870001969d92#L326

@Override
public void getRenderSize(Vector2f store) {
  if( vrsystemFunctions == null ) {
    // 1344x1512
    store.x = 1344f;
    store.y = 1512f;
  } else {
    IntByReference x = new IntByReference();
    IntByReference y = new IntByReference();
    vrsystemFunctions.GetRecommendedRenderTargetSize.apply(x, y);
    store.x = x.getValue();
    store.y = y.getValue();
  }
}
/*

Find out what application (window) is in focus in Java　　　　来源：Find out what application (window) is in focus in Java - Stack Overflow

 public interface Psapi extends StdCallLibrary {
  Psapi INSTANCE = (Psapi) Native.loadLibrary("Psapi", Psapi.class);

  WinDef.DWORD GetModuleBaseNameW(Pointer hProcess, Pointer hModule, byte[] lpBaseName, int nSize);
}
  if (Platform.isWindows()) {
    final int PROCESS_VM_READ=0x0010;
    final int PROCESS_QUERY_INFORMATION=0x0400;
    final User32 user32 = User32.INSTANCE;
    final Kernel32 kernel32=Kernel32.INSTANCE;
    final Psapi psapi = Psapi.INSTANCE;
    WinDef.HWND windowHandle=user32.GetForegroundWindow();
    IntByReference pid= new IntByReference();
    user32.GetWindowThreadProcessId(windowHandle, pid);
    WinNT.HANDLE processHandle=kernel32.OpenProcess(PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, true, pid.getValue());

    byte[] filename = new byte[512];
    Psapi.INSTANCE.GetModuleBaseNameW(processHandle.getPointer(), Pointer.NULL, filename, filename.length);
    String name=new String(filename);
    System.out.println(name);
    if (name.endsWith("wwahost.exe")) { // Metro App
      // There is no stable API to get the current Metro app
      // But you can guestimate the name form the current directory of the process
      // To query this, see:
      // http://stackoverflow.com/questions/16110936/read-other-process-current-directory-in-c-sharp
    }

passing a int** to a C routine using JNA　　　　　　来源：java - passing a int** to a C routine using JNA - Stack Overflow

 // Original C declaration
void allocate_buffer(char **bufp, int* lenp);

// Equivalent JNA mapping
 void allocate_buffer(PointerByReference bufp, IntByReference lenp);

// Usage
PointerByReference pref = new PointerByReference();
IntByReference iref = new IntByReference();
lib.allocate_buffer(pref, iref);
Pointer p = pref.getValue();
byte[] buffer = p.getByteArray(0, iref.getValue());

JnaSession.getAttrNames(...)　　　　　　　　来源：gatk/JnaSession.java at master · broadgsa/gatk (github.com)

private static List<String> getAttrNames(PointerByReference names) throws DrmaaException {
  List<String> namesList = new ArrayList<String>();
  IntByReference size = new IntByReference();
  int errnum;
  errnum = LibDrmaa.drmaa_get_num_attr_names(names.getValue(), size);
  checkError(errnum, "unable to get attribute names");
  int num = size.getValue();
  Memory value = new Memory(LibDrmaa.DRMAA_ATTR_BUFFER);
  for (int i = 1; i <= num; i++) {
    errnum = LibDrmaa.drmaa_get_next_attr_name(names.getValue(), value, LibDrmaa.DRMAA_ATTR_BUFFER_LEN);
    checkError(errnum, "unable to get attribute name " + i);
    if (errnum == LibDrmaa.DRMAA_ERRNO.DRMAA_ERRNO_NO_MORE_ELEMENTS)
      break;
    namesList.add(value.getString(0));
  }
  return namesList;
}

WevtapiUtil.EvtNextPublisherId(...)　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c65f49c1095a5000191f2f0#L185

/**
 * Gets the identifier of a provider from the enumerator.
 *
 * @param publisherEnum [in] A handle to the registered providers enumerator that
 *                      the {@link Wevtapi#EvtOpenPublisherEnum} function returns.
 * @return The name of the registered provider.
 */
public static String EvtNextPublisherId(EVT_HANDLE publisherEnum) {
  IntByReference publisherIdBufferUsed = new IntByReference();
  boolean result = Wevtapi.INSTANCE.EvtNextPublisherId(publisherEnum, 0, null, publisherIdBufferUsed);
  int errorCode = Kernel32.INSTANCE.GetLastError();
  if ((!result) && errorCode != Kernel32.ERROR_INSUFFICIENT_BUFFER) {
    throw new Win32Exception(errorCode);
  }
  char[] publisherIdBuffer = new char[publisherIdBufferUsed.getValue()];
  result = Wevtapi.INSTANCE.EvtNextPublisherId(publisherEnum, publisherIdBuffer.length, publisherIdBuffer, publisherIdBufferUsed);
  if (!result) {
    throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
  }
  return Native.toString(publisherIdBuffer);
}

W32Service.queryServiceConfig2(...)　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c65f49c1095a5000191f2eb#L125

private Pointer queryServiceConfig2(int type) {
  IntByReference bufferSize = new IntByReference();
  Advapi32.INSTANCE.QueryServiceConfig2(_handle, type, Pointer.NULL, 0, bufferSize);
  Pointer buffer = new Memory(bufferSize.getValue());
  if (!Advapi32.INSTANCE.QueryServiceConfig2(_handle, type, buffer, bufferSize.getValue(),
      new IntByReference())) {
    throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
  }
  return buffer;
}

WinspoolUtil.getPrinterInfo2(...)　　　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c65f49c1095a5000191f306#L78

private static PRINTER_INFO_2[] getPrinterInfo2(int flags) {
  IntByReference pcbNeeded = new IntByReference();
  IntByReference pcReturned = new IntByReference();
  Winspool.INSTANCE.EnumPrinters(flags, null, 2, null, 0, pcbNeeded, pcReturned);
  if (pcbNeeded.getValue() <= 0)
    return new PRINTER_INFO_2[0];
  PRINTER_INFO_2 pPrinterEnum = new PRINTER_INFO_2(pcbNeeded.getValue());
  if (!Winspool.INSTANCE.EnumPrinters(flags, null, 2, pPrinterEnum.getPointer(), pcbNeeded.getValue(), pcbNeeded,
      pcReturned))
    throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
  pPrinterEnum.read();
  return (PRINTER_INFO_2[]) pPrinterEnum.toArray(pcReturned.getValue());
}

ProcessTree$Darwin.<init>(...)　　　　　　　　　　来源：jenkins/ProcessTree.java at master · jenkinsci/jenkins (github.com)

    Darwin(boolean vetoersExist) {
      super(vetoersExist);

      String arch = System.getProperty("sun.arch.data.model");
      if ("64".equals(arch)) {
        sizeOf_kinfo_proc = sizeOf_kinfo_proc_64;
        kinfo_proc_pid_offset = kinfo_proc_pid_offset_64;
        kinfo_proc_ppid_offset = kinfo_proc_ppid_offset_64;
      } else {
        sizeOf_kinfo_proc = sizeOf_kinfo_proc_32;
        kinfo_proc_pid_offset = kinfo_proc_pid_offset_32;
        kinfo_proc_ppid_offset = kinfo_proc_ppid_offset_32;
      }
      try {
        IntByReference ref = new IntByReference(sizeOfInt);
        IntByReference size = new IntByReference(sizeOfInt);
        Memory m;
        int nRetry = 0;
        while(true) {
          // find out how much memory we need to do this
          if(LIBC.sysctl(MIB_PROC_ALL,3, NULL, size, NULL, ref)!=0)
            throw new IOException("Failed to obtain memory requirement: "+LIBC.strerror(Native.getLastError()));

          // now try the real call
          m = new Memory(size.getValue());
          if(LIBC.sysctl(MIB_PROC_ALL,3, m, size, NULL, ref)!=0) {
            if(Native.getLastError()==ENOMEM && nRetry++<16)
              continue; // retry
            throw new IOException("Failed to call kern.proc.all: "+LIBC.strerror(Native.getLastError()));
          }
          break;
        }

        int count = size.getValue()/sizeOf_kinfo_proc;
        LOGGER.fine("Found "+count+" processes");

        for( int base=0; base<size.getValue(); base+=sizeOf_kinfo_proc) {
          int pid = m.getInt(base+ kinfo_proc_pid_offset);
          int ppid = m.getInt(base+ kinfo_proc_ppid_offset);
//                    int effective_uid = m.getInt(base+304);
//                    byte[] comm = new byte[16];
//                    m.read(base+163,comm,0,16);

          super.processes.put(pid,new DarwinProcess(pid,ppid));
        }
      } catch (IOException e) {
        LOGGER.log(Level.WARNING, "Failed to obtain process list",e);
      }
    }

OpenVRUtil.getTrackedDeviceStringProperty(...)　　　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c781695e70f870001969cea#L20

/**
 * Get the value of the given string {@link JOpenVRLibrary.ETrackedDeviceProperty property} attached to the given device.
 * @param system the underlying OpenVR system.
 * @param deviceIndex the index of the device to query.
 * @param property the property to query.
 * @param bufferSize the size of the buffer to use for storing native string.
 * @return the value of the given string property attached to the given device.
 * @see OpenVRInput#getTrackedControllerCount()
 * @see JOpenVRLibrary.ETrackedDeviceProperty
 * @see #getTrackedDeviceStringProperty(VR_IVRSystem_FnTable, int, int)
 */
public static String getTrackedDeviceStringProperty(VR_IVRSystem_FnTable system, int deviceIndex, int property, int bufferSize){
  String str ="";
  
  int unBufferSize = 256;
  Pointer pchValue = new Memory(unBufferSize); 
  IntByReference pError = new IntByReference();
  
  system.GetStringTrackedDeviceProperty.apply(deviceIndex, property, pchValue, unBufferSize, pError);
  
  if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_Success){
    str = pchValue.getString(0);
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_BufferTooSmall){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_CouldNotContactServer){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_InvalidDevice){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_InvalidOperation){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_NotYetAvailable){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_PermissionDenied){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_StringExceedsMaximumLength){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_UnknownProperty){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_ValueNotProvidedByDevice){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_WrongDataType){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else if (pError.getValue() == ETrackedPropertyError.ETrackedPropertyError_TrackedProp_WrongDeviceClass){
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  } else {
    throw new IllegalArgumentException("Cannot access property \""+getETrackedDevicePropertyString(property)+"\" ("+property+") for device "+deviceIndex+": "+getETrackedPropertyErrorString(pError.getValue())+" ("+pError.getValue()+")");
  }
  
  return str;
}

Gst$NativeArgs.<init>(...)　　　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c6579f91095a50001550202#L107

public NativeArgs(String progname, String[] args) {
  //
  // Allocate some native memory to pass the args down to the native layer
  //
  argsCopy = new Memory[args.length + 2];
  argvMemory = new Memory(argsCopy.length * Pointer.SIZE);
  
  //
  // Insert the program name as argv[0]
  //
  Memory arg = new Memory(progname.getBytes().length + 4);
  arg.setString(0, progname, false);
  argsCopy[0] = arg;
  
  for (int i = 0; i < args.length; i++) {
    arg = new Memory(args[i].getBytes().length + 1);
    arg.setString(0, args[i], false);
    argsCopy[i + 1] = arg;
  }
  argvMemory.write(0, argsCopy, 0, argsCopy.length);
  argvRef = new PointerByReference(argvMemory);
  argcRef = new IntByReference(args.length + 1);
}
String[] toStringArray() {

Java: JNA SystemParametersInfo parameters type　　　　　　　　来源：pointers - Java: JNA SystemParametersInfo parameters type - Stack Overflow

 IntByReference intPtr = new IntByReference();
//that's the place where i'm stuck trying to initialize with Pointer constructor
Pointer ptr = new Memory(Pointer.SIZE * 256);
User32.INSTANCE.SystemParametersInfo(User32.SPI_GETSCREENSAVERRUNNING, 0,intPtr.getPointer(), 0);
User32.INSTANCE.SystemParametersInfo(User32.SPI_GETDESKWALLPAPER,256, ptr, 0);

ExecutableFileInfo.getVersionInfo(...)　　　　　　　　　　　　来源：ui-automation/ExecutableFileInfo.java at master · mmarquee/ui-automation (github.com)

  /**
   * Gets the version info (if present) from the file in the path.
   * @param path Pathname to file
   * @return The version info array (loads of integers)
   */
  public static int[] getVersionInfo(final String path) {
    IntByReference dwDummy = new IntByReference();
    dwDummy.setValue(0);

    int versionlength = com.sun.jna.platform.win32.Version.INSTANCE.GetFileVersionInfoSize(path, dwDummy);

    byte[] bufferarray = new byte[versionlength];
    Pointer lpData = new Memory(bufferarray.length);
    PointerByReference lplpBuffer = new PointerByReference();
    IntByReference puLen = new IntByReference();
    com.sun.jna.platform.win32.Version.INSTANCE.GetFileVersionInfo(path, 0, versionlength, lpData);
    com.sun.jna.platform.win32.Version.INSTANCE.VerQueryValue(lpData, "\\", lplpBuffer, puLen);

    VerRsrc.VS_FIXEDFILEINFO lplpBufStructure = new VerRsrc.VS_FIXEDFILEINFO(lplpBuffer.getValue());
    lplpBufStructure.read();

    int v1 = (lplpBufStructure.dwFileVersionMS).intValue() >> 16;
    int v2 = (lplpBufStructure.dwFileVersionMS).intValue() & 0xffff;
    int v3 = (lplpBufStructure.dwFileVersionLS).intValue() >> 16;
    int v4 = (lplpBufStructure.dwFileVersionLS).intValue() & 0xffff;
    System.out.println("Version: " + v1 + "." + v2 + "." + v3 + "." + v4);
    return new int[]{v1, v2, v3, v4};
  }
}

Advapi32Util.registryGetKeys(...)　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c66906a1095a50001cf5b42#L1342

/**
 * Get names of the registry key's sub-keys.
 *
 * @param hKey
 *            Registry key.
 * @return Array of registry key names.
 */
public static String[] registryGetKeys(HKEY hKey) {
  IntByReference lpcSubKeys = new IntByReference();
  IntByReference lpcMaxSubKeyLen = new IntByReference();
  int rc = Advapi32.INSTANCE
      .RegQueryInfoKey(hKey, null, null, null, lpcSubKeys,
          lpcMaxSubKeyLen, null, null, null, null, null, null);
  if (rc != W32Errors.ERROR_SUCCESS) {
    throw new Win32Exception(rc);
  }
  ArrayList<String> keys = new ArrayList<String>(lpcSubKeys.getValue());
  char[] name = new char[lpcMaxSubKeyLen.getValue() + 1];
  for (int i = 0; i < lpcSubKeys.getValue(); i++) {
    IntByReference lpcchValueName = new IntByReference(
        lpcMaxSubKeyLen.getValue() + 1);
    rc = Advapi32.INSTANCE.RegEnumKeyEx(hKey, i, name, lpcchValueName,
        null, null, null, null);
    if (rc != W32Errors.ERROR_SUCCESS) {
      throw new Win32Exception(rc);
    }
    keys.add(Native.toString(name));
  }
  return keys.toArray(new String[0]);
}

Gst$NativeArgs.toStringArray()　　　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c6579f91095a50001550202#L130

  String[] toStringArray() {
    //
    // Unpack the native arguments back into a String array
    //
    List<String> args = new ArrayList<String>();
    Pointer argv = argvRef.getValue();
    for (int i = 1; i < argcRef.getValue(); i++) {
      Pointer arg = argv.getPointer(i * Pointer.SIZE);
      if (arg != null) {
        args.add(arg.getString(0, false));
      }
    }
    return args.toArray(new String[args.size()]);
  }   
}

ProcessEpoll.checkDeadPool()　　　　　　　　　　　　来源：NuProcess/ProcessEpoll.java at master · brettwooldridge/NuProcess (github.com)

private void checkDeadPool()
{
 if (deadPool.isEmpty()) {
   return;
 }
 IntByReference ret = new IntByReference();
 Iterator<LinuxProcess> iterator = deadPool.iterator();
 while (iterator.hasNext()) {
   LinuxProcess process = iterator.next();
   int rc = LibC.waitpid(process.getPid(), ret, LibC.WNOHANG);
   if (rc == 0) {
    continue;
   }
   iterator.remove();
   if (rc < 0) {
    process.onExit((Native.getLastError() == LibC.ECHILD) ? Integer.MAX_VALUE : Integer.MIN_VALUE);
    continue;
   }
   handleExit(process, ret.getValue());
 }
}

EmbeddedInternalConnection$EmbeddedInternalStream.write(...)　　　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c6621101095a50001a5bfb2#L157

@Override
public void write(final List<ByteBuf> buffers) {
  byte[] message = createCompleteMessage(buffers);
  PointerByReference outputBufferReference = new PointerByReference();
  IntByReference outputSize = new IntByReference();
  MongoDBCAPIHelper.client_invoke(clientPointer, message, outputBufferReference, outputSize, clientStatusPointer);
  curResponse = outputBufferReference.getValue().getByteBuffer(0, outputSize.getValue());
}

Netapi32Util.getJoinStatus(...)　　　　　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c65f49c1095a5000191f2c3#L141

/**
 * Return the domain/workgroup join status for a computer. 
 * @param computerName Computer name.
 * @return Join status.
 */
public static int getJoinStatus(String computerName) {
  PointerByReference lpNameBuffer = new PointerByReference();
  IntByReference bufferType = new IntByReference();
  
  try {
    int rc = Netapi32.INSTANCE.NetGetJoinInformation(computerName, lpNameBuffer, bufferType);
    if (LMErr.NERR_Success != rc) {
      throw new Win32Exception(rc);            
    }
    return bufferType.getValue();
  } finally {
    if (lpNameBuffer.getPointer() != null) {
      int rc = Netapi32.INSTANCE.NetApiBufferFree(lpNameBuffer.getValue());
      if (LMErr.NERR_Success != rc) {
        throw new Win32Exception(rc);            
      }
    }
  }        
}

OpenVR.getType()　　　　　　　　　　　　来源：https://www.tabnine.com/web/assistant/code/rs/5c781696e70f870001969d92#L541

@Override
public HmdType getType() {
  if( vrsystemFunctions != null ) {      
    Pointer str1 = new Memory(128);
    Pointer str2 = new Memory(128);
    String completeName = "";
    vrsystemFunctions.GetStringTrackedDeviceProperty.apply(JOpenVRLibrary.k_unTrackedDeviceIndex_Hmd,
                                JOpenVRLibrary.ETrackedDeviceProperty.ETrackedDeviceProperty_Prop_ManufacturerName_String,
                                str1, 128, hmdErrorStore);
    if( hmdErrorStore.getValue() == 0 ) completeName += str1.getString(0);
    vrsystemFunctions.GetStringTrackedDeviceProperty.apply(JOpenVRLibrary.k_unTrackedDeviceIndex_Hmd,
                                JOpenVRLibrary.ETrackedDeviceProperty.ETrackedDeviceProperty_Prop_ModelNumber_String,
                                str2, 128, hmdErrorStore);
    if( hmdErrorStore.getValue() == 0 ) completeName += " " + str2.getString(0);
    if( completeName.length() > 0 ) {
      completeName = completeName.toLowerCase(Locale.ENGLISH).trim();

 

本文来源： com.sun.jna.ptr.IntByReference java code examples | Tabnine