Examples with Pointer com.sun.jna.Pointer used on opensource projects

Example 26 with Pointer

use of com.sun.jna.Pointer in project jna by java-native-access.

the class Kernel32UtilTest method testFreeLocalMemory.

public void testFreeLocalMemory() {
    try {
        Pointer ptr = new Pointer(0xFFFFFFFFFFFFFFFFL);
        Kernel32Util.freeLocalMemory(ptr);
        fail("Unexpected success to free bad local memory");
    } catch (Win32Exception e) {
        HRESULT hr = e.getHR();
        int code = W32Errors.HRESULT_CODE(hr.intValue());
        assertEquals("Mismatched failure reason code", WinError.ERROR_INVALID_HANDLE, code);
    }
}

Example 27 with Pointer

use of com.sun.jna.Pointer in project jna by java-native-access.

the class SystemBTest method testSysctl.

public void testSysctl() {
    final String mibName = "hw.logicalcpu";
    final int nCpu = Runtime.getRuntime().availableProcessors();
    IntByReference size = new IntByReference(SystemB.INT_SIZE);
    Pointer p = new Memory(size.getValue());
    int ret = SystemB.INSTANCE.sysctlbyname(mibName, p, size, null, 0);
    assertEquals(ret, 0);
    // These values should be equal unless affinity is set, limiting nCpu
    assertTrue(p.getInt(0) >= nCpu);
    size = new IntByReference();
    ret = SystemB.INSTANCE.sysctlnametomib(mibName, null, size);
    assertEquals(ret, 0);
    // Size should be 2
    assertEquals(size.getValue(), 2);
    Pointer mibp = new Memory(size.getValue() * SystemB.INT_SIZE);
    ret = SystemB.INSTANCE.sysctlnametomib(mibName, mibp, size);
    assertEquals(ret, 0);
    // Size should be 2
    assertEquals(size.getValue(), 2);
    int[] mib = mibp.getIntArray(0, size.getValue());
    // mib should be { 6, 103(?) }
    assertEquals(mib.length, 2);
    assertEquals(mib[0], 6);
    size = new IntByReference(SystemB.INT_SIZE);
    p = new Memory(size.getValue());
    ret = SystemB.INSTANCE.sysctl(mib, mib.length, p, size, null, 0);
    assertTrue(p.getInt(0) >= nCpu);
}

Example 28 with Pointer

use of com.sun.jna.Pointer in project jna by java-native-access.

the class Kernel32Util method formatMessage.

/**
     * Format a message from the value obtained from
     * {@link Kernel32#GetLastError()} or {@link Native#getLastError()}.
     *
     * @param code The error code
     * @return Formatted message.
     */
public static String formatMessage(int code) {
    PointerByReference buffer = new PointerByReference();
    int nLen = Kernel32.INSTANCE.FormatMessage(WinBase.FORMAT_MESSAGE_ALLOCATE_BUFFER | WinBase.FORMAT_MESSAGE_FROM_SYSTEM | WinBase.FORMAT_MESSAGE_IGNORE_INSERTS, null, code, // TODO: // MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT)
    0, buffer, 0, null);
    if (nLen == 0) {
        throw new LastErrorException(Native.getLastError());
    }
    Pointer ptr = buffer.getValue();
    try {
        String s = ptr.getWideString(0);
        return s.trim();
    } finally {
        freeLocalMemory(ptr);
    }
}

Example 29 with Pointer

use of com.sun.jna.Pointer in project jna by java-native-access.

the class OaIdlUtil method toPrimitiveArray.

/**
     * Read SAFEARRAY into a java array. Not all VARTYPEs are supported!
     *
     * <p>
     * Supported types:</p>
     * <ul>
     * <li>VT_BOOL</li>
     * <li>VT_UI1</li>
     * <li>VT_I1</li>
     * <li>VT_UI2</li>
     * <li>VT_I2</li>
     * <li>VT_UI4</li>
     * <li>VT_UINT</li>
     * <li>VT_I4</li>
     * <li>VT_INT</li>
     * <li>VT_ERROR</li>
     * <li>VT_R4</li>
     * <li>VT_R8</li>
     * <li>VT_DATE</li>
     * <li>VT_BSTR</li>
     * <li>VT_VARIANT (Onle the following VARTYPES):
     * <ul>
     * <li>VT_EMPTY (converted to NULL)</li>
     * <li>VT_NULL</li>
     * <li>VT_BOOL</li>
     * <li>VT_UI1</li>
     * <li>VT_I1</li>
     * <li>VT_UI2</li>
     * <li>VT_I2</li>
     * <li>VT_UI4</li>
     * <li>VT_UINT</li>
     * <li>VT_I4</li>
     * <li>VT_INT</li>
     * <li>VT_ERROR</li>
     * <li>VT_R4</li>
     * <li>VT_R8</li>
     * <li>VT_DATE</li>
     * <li>VT_BSTR</li>
     * </ul>
     * </li>
     * </ul>
     *
     * @param sa SAFEARRAY to convert
     * @param destruct if true the supplied SAFEARRAY is destroyed, there must
     * not be additional locks on the array!
     * @return Java array corresponding to the given SAFEARRAY
     */
public static Object toPrimitiveArray(SAFEARRAY sa, boolean destruct) {
    Pointer dataPointer = sa.accessData();
    try {
        int dimensions = sa.getDimensionCount();
        int[] minIdx = new int[dimensions];
        int[] maxIdx = new int[dimensions];
        int[] elements = new int[dimensions];
        int[] cumElements = new int[dimensions];
        int varType = sa.getVarType().intValue();
        for (int i = 0; i < dimensions; i++) {
            minIdx[i] = sa.getLBound(i);
            maxIdx[i] = sa.getUBound(i);
            elements[i] = maxIdx[i] - minIdx[i] + 1;
        }
        for (int i = dimensions - 1; i >= 0; i--) {
            if (i == (dimensions - 1)) {
                cumElements[i] = 1;
            } else {
                cumElements[i] = cumElements[i + 1] * elements[i + 1];
            }
        }
        if (dimensions == 0) {
            throw new IllegalArgumentException("Supplied Array has no dimensions.");
        }
        int elementCount = cumElements[0] * elements[0];
        Object sourceArray;
        switch(varType) {
            case VT_UI1:
            case VT_I1:
                sourceArray = dataPointer.getByteArray(0, elementCount);
                break;
            case VT_BOOL:
            case VT_UI2:
            case VT_I2:
                sourceArray = dataPointer.getShortArray(0, elementCount);
                break;
            case VT_UI4:
            case VT_UINT:
            case VT_I4:
            case VT_INT:
            case VT_ERROR:
                sourceArray = dataPointer.getIntArray(0, elementCount);
                break;
            case VT_R4:
                sourceArray = dataPointer.getFloatArray(0, elementCount);
                break;
            case VT_R8:
            case VT_DATE:
                sourceArray = dataPointer.getDoubleArray(0, elementCount);
                break;
            case VT_BSTR:
                sourceArray = dataPointer.getPointerArray(0, elementCount);
                break;
            case VT_VARIANT:
                VARIANT variant = new VARIANT(dataPointer);
                sourceArray = variant.toArray(elementCount);
                break;
            case VT_UNKNOWN:
            case VT_DISPATCH:
            case VT_CY:
            case VT_DECIMAL:
            case VT_RECORD:
            default:
                throw new IllegalStateException("Type not supported: " + varType);
        }
        Object targetArray = Array.newInstance(Object.class, elements);
        toPrimitiveArray(sourceArray, targetArray, minIdx, maxIdx, elements, cumElements, varType, new int[0]);
        return targetArray;
    } finally {
        sa.unaccessData();
        if (destruct) {
            sa.destroy();
        }
    }
}

Example 30 with Pointer

use of com.sun.jna.Pointer in project jna by java-native-access.

the class W32Service method getFailureActionsFlag.

/**
	 * Get the failure actions flag of the specified service. Corresponds to 
	 * <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/ms681988.aspx">QueryServiceConfig2</a>
	 * with parameter dwInfoLevel set to SERVICE_CONFIG_FAILURE_ACTIONS_FLAG. 
	 */
public boolean getFailureActionsFlag() {
    Pointer buffer = queryServiceConfig2(Winsvc.SERVICE_CONFIG_FAILURE_ACTIONS_FLAG);
    SERVICE_FAILURE_ACTIONS_FLAG result = new SERVICE_FAILURE_ACTIONS_FLAG(buffer);
    return result.fFailureActionsOnNonCrashFailures != 0;
}