Pointer in Java With Example
Best Java code snippets using com.sun.jna.Pointer (Showing top 20 results out of 1,125)
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public static boolean setKeyboardOverlayShowing( boolean showingState) { int ret; if (showingState) { Pointer pointer = new Memory ( 3 ); pointer. setString ( 0 , "mc" ); Pointer empty = new Memory ( 1 ); empty. setString ( 0 , "" ); ret = vrOverlay.ShowKeyboard.apply( 0 , 0 , pointer, 256 , empty, ( byte ) 1 , 0 ); keyboardShowing = 0 == ret; if (ret != 0 ) { logger.error( "VR Overlay Error: " + vrOverlay.GetOverlayErrorNameFromEnum.apply(ret). getString ( 0 )); } } else { try { vrOverlay.HideKeyboard.apply(); } catch (Error e) { logger.error( "Error bringing up keyboard overlay: " + e.toString()); } keyboardShowing = false ; } return keyboardShowing; }
public void destroy() { for (ByteBuffer byteBuffer : availableBuffers) { final long address = ((DirectBuffer) byteBuffer).address(); Pointer pointer = new Pointer (address); LibC.INSTANCE.munlock(pointer, new NativeLong (fileSize)); } }
try { int suggestionsCount = 0 ; PointerByReference suggestions = new PointerByReference (); final byte [] wordAsBytes = stringToBytes(word); if (wordAsBytes.length == 0 && word.length() > 0 ) { Pointer[] pointerArray = suggestions. getValue (). getPointerArray ( 0 , suggestionsCount); long len = pointerArray[i]. indexOf ( 0 , ( byte ) 0 ); if (len != - 1 ) { if (len > Integer.MAX_VALUE) { "String improperly terminated: " + len); byte [] data = pointerArray[i]. getByteArray ( 0 , ( int )len);
public static Pointer mmap( long len, int prot, int flags, int fildes, long off) throws IOException { Pointer addr = new Pointer ( 0 ); Pointer result = Delegate.mmap(addr, new NativeLong (len), prot, flags, fildes, new NativeLong (off)); if (Pointer. nativeValue (result) == - 1 ) { if (logger.isDebugEnabled()) logger.debug(errno.strerror()); throw new IOException( "mmap failed: " + errno.strerror()); } return result; }
public static ByteBuffer allocate( int fsBlockSize, int size) { assert fsBlockSize > 0 ; assert size > 0 ; PointerByReference refToPtr = new PointerByReference (); int retVal = IgniteNativeIoLib.posix_memalign(refToPtr, new NativeLong (fsBlockSize), new NativeLong (size)); if (retVal != 0 ) throw new IgniteOutOfMemoryException( "Failed to allocate memory: " + IgniteNativeIoLib.strerror(retVal)); return GridUnsafe.wrapPointer(Pointer. nativeValue (refToPtr. getValue ()), size); }
private MacAddress getMacAddress(String nifName) { Pointer lpAdapter = NativePacketDllMappings.PacketOpenAdapter(nifName); long hFile = - 1 ; if (lpAdapter != null) { if (Native.POINTER_SIZE == 4 ) { hFile = lpAdapter. getInt ( 0 ); } else { hFile = lpAdapter. getLong ( 0 ); } } if (hFile == -1L) { int err = Native. getLastError (); logger.error( "Unable to open the NIF {}, Error Code: {}" , nifName, err); return null; } Memory mem = new Memory (NativePacketDllMappings.PACKET_OID_DATA_SIZE); mem. clear (); PACKET_OID_DATA oidData = new PACKET_OID_DATA(mem); oidData.Length = new NativeLong (6L); oidData.Oid = new NativeLong (0x01010102L); int status = NativePacketDllMappings.PacketRequest(lpAdapter, 0 , oidData); NativePacketDllMappings.PacketCloseAdapter(lpAdapter); if (status == 0 ) { logger.error( "Failed to retrieve the link layer address of the NIF: {}" , nifName); return null; } else { return MacAddress.getByAddress(oidData.Data); } }
Structure s = (Structure)currentValue; if (Structure.ByReference. class .isAssignableFrom(type)) { s = Structure.updateStructureByReference((Class<Structure>) type, s, getPointer (offset)); } else { s.useMemory( this , ( int )offset, true ); result = Function. valueOf ( getInt (offset) != 0 ); } else if (type == byte . class || type == Byte. class ) { result = Byte.valueOf( getByte (offset)); } else if (type == short . class || type == Short. class ) { result = Short.valueOf( getShort (offset)); } else if (type == char . class || type == Character. class ) { result = Character.valueOf( getChar (offset)); } else if (type == int . class || type == Integer. class ) { result = Integer.valueOf( getInt (offset)); } else if (type == long . class || type == Long. class ) { result = Long.valueOf( getLong (offset)); } else if (type == float . class || type == Float. class ) { result = Float.valueOf( getFloat (offset)); } else if (type == double . class || type == Double. class ) { result = Double.valueOf( getDouble (offset)); } else if (Pointer. class .isAssignableFrom(type)) { Pointer p = getPointer (offset); if (p != null) { Pointer oldp = currentValue instanceof Pointer Pointer p = getPointer (offset); result = p != null ? p. getString ( 0 ) : null; } else if (type == WString. class ) {
PointerByReference errorRef = new PointerByReference (); int ret = libc_mac.sandbox_init(rules.toAbsolutePath().toString(), SANDBOX_NAMED, errorRef); Pointer errorBuf = errorRef. getValue (); RuntimeException e = new UnsupportedOperationException( "sandbox_init(): " + errorBuf. getString ( 0 )); libc_mac.sandbox_free_error(errorBuf); throw e;
@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();
private static class MemberOrder { public int first; public int middle; public int last; }
if (eventHandle.getPointer(). getInt ( 0 ) == WEvtApi.EvtSubscribeErrors.ERROR_EVT_QUERY_RESULT_STALE) { logger.error(MISSING_EVENT_MESSAGE); } else { logger.error(RECEIVED_THE_FOLLOWING_WIN32_ERROR + eventHandle.getPointer(). getInt ( 0 )); int newMaxSize = used. getInt ( 0 ); buffer = new Memory (size); wEvtApi.EvtRender(null, eventHandle, WEvtApi.EvtRenderFlags.EVENT_XML, size, buffer, used, propertyCount); int usedBytes = used. getInt ( 0 ); String string = StandardCharsets.UTF_16LE.decode(buffer. getByteBuffer ( 0 , usedBytes)).toString(); if (string.endsWith( "\u0000" )) {
public HRESULT GetTypeComp( ITypeComp.ByReference pTComp) { Pointer vptr = this . getPointer ().getPointer( 0 ); Function func = Function. getFunction (vptr. getPointer ( 32 )); PointerByReference ppTComp = new PointerByReference (); int hr = func. invokeInt ( new Object[] { this .getPointer(), ppTComp }); pTComp.setPointer(ppTComp. getPointer ()); return new HRESULT(hr); }
public HRESULT GetTypeInfo( UINT index, ITypeInfo.ByReference pTInfo) { Pointer vptr = this . getPointer ().getPointer( 0 ); Function func = Function. getFunction (vptr. getPointer ( 16 )); PointerByReference ppTInfo = new PointerByReference (); int hr = func. invokeInt ( new Object[] { this .getPointer(), index, ppTInfo }); pTInfo.setPointer(ppTInfo. getValue ()); return new HRESULT(hr); }
PointerByReference headerPP = new PointerByReference (); PointerByReference dataPP = new PointerByReference (); int rc = NativeMappings.pcap_next_ex(handle, headerPP, dataPP); switch (rc) { throw new TimeoutException(); case 1 : Pointer headerP = headerPP. getValue (); Pointer dataP = dataPP. getValue (); if (headerP == null || dataP == null) { return dataP. getByteArray ( 0 , pcap_pkthdr.getCaplen(headerP)); case - 1 : throw new PcapNativeException( "Error occurred in pcap_next_ex(): " + getError(), rc);
throw new UnsupportedOperationException( "seccomp unavailable: seccomp(BOGUS_OPERATION) returned " + ret); } else { int errno = Native. getLastError (); switch (errno) { case ENOSYS: break ; throw new UnsupportedOperationException( "seccomp unavailable: seccomp(SECCOMP_SET_MODE_FILTER, BOGUS_FLAG) returned " + ret); } else { int errno = Native. getLastError (); switch (errno) { case ENOSYS: break ; throw new UnsupportedOperationException( "seccomp unavailable: prctl(BOGUS_OPTION) returned " + ret); } else { int errno = Native. getLastError (); switch (errno) { case ENOSYS: break ; long pointer = Pointer. nativeValue (prog.getPointer()); if (linux_syscall(arch.seccomp, SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_TSYNC, new NativeLong (pointer)) != 0 ) { method = 0 ; int errno1 = Native. getLastError ();
if (value instanceof Pointer) { if (dstType == String. class ) { value = ((Pointer)value). getString ( 0 , encoding); value = new WString(((Pointer)value). getWideString ( 0 )); value = ((Pointer)value). getStringArray ( 0 , encoding); value = ((Pointer)value). getWideStringArray ( 0 ); Structure s = Structure.newInstance((Class<? extends Structure>) dstType); byte [] buf = new byte[s.size()]; ((Pointer)value). read ( 0 , buf, 0 , buf.length); s.getPointer(). write ( 0 , buf, 0 , buf.length); s.read(); value = s; value = Function. valueOf (((Number)value).intValue() != 0 );
public NativeLong getNativeLong( long offset) { return new NativeLong (NativeLong.SIZE == 8 ? getLong (offset) : getInt (offset)); }
logger.warn( "Unable to lock JVM memory. Failed to set working set size. Error code {}" , Native. getLastError ()); } else { JNAKernel32Library.MemoryBasicInformation memInfo = new JNAKernel32Library.MemoryBasicInformation(); long address = 0 ; while (kernel.VirtualQueryEx(process, new Pointer (address), memInfo, memInfo.size()) != 0 ) { boolean lockable = memInfo.State. longValue () == JNAKernel32Library.MEM_COMMIT && (memInfo.Protect. longValue () & JNAKernel32Library.PAGE_NOACCESS) != JNAKernel32Library.PAGE_NOACCESS && (memInfo.Protect. longValue () & JNAKernel32Library.PAGE_GUARD) != JNAKernel32Library.PAGE_GUARD; if (lockable) { kernel.VirtualLock(memInfo.BaseAddress, new SizeT(memInfo.RegionSize.longValue()));
private static boolean initOpenVROverlay() { vrOverlay = new VR_IVROverlay_FnTable(JOpenVRLibrary.VR_GetGenericInterface(JOpenVRLibrary.IVROverlay_Version, hmdErrorStore)); if (hmdErrorStore.get( 0 ) == 0 ) { vrOverlay.setAutoSynch( false ); vrOverlay.read(); logger.info( "OpenVR Overlay initialized OK." ); } else { String errorString = jopenvr.JOpenVRLibrary.VR_GetVRInitErrorAsEnglishDescription(hmdErrorStore.get( 0 )). getString ( 0 ); logger.info( "vrOverlay initialization failed:" + errorString); return false ; } return true ; }
private void init(Pointer[] els) { elements = new Memory (Native.POINTER_SIZE * els.length); elements. write ( 0 , els, 0 , els.length); write(); }
Source: https://www.tabnine.com/code/java/classes/com.sun.jna.Pointer
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