List of arrayIndexScale() Examples

Examples of arrayIndexScale()

sun.misc.Unsafe.arrayIndexScale()

Retrieves the array index scale for the array Class given. The index scale is the value used to determine the offset of a particular element in the array given the array's base offset and an index. The following code snippet illustrates the usage.

 int base = unsafe.arrayBaseOffset(int[].class); int scale = unsafe.arrayIndexScale(int[].class); int elementIdx = 1; int[] array = { 0, 1, 2 }; long offsetForIdx = base + (elementIdx * scale);

The Class passed MUST me any array type, such that the method {@link Class#isArray()} returns true. For example,int[].class.

@param clazz The array Class object. @return The index scale value.

    Unsafe unsafe = getUnsafe();
    // These will vary from platform to platform,
    // so just make sure they exist
    int addrSize = unsafe.addressSize();
    int abo = unsafe.arrayBaseOffset(int[].class);
    int ais = unsafe.arrayIndexScale(int[].class);


    Object f;
    try {
      f = unsafe.allocateInstance(Foo.class);
      System.out.println(((Foo)f).a);

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Examples of arrayIndexScale()

Examples of sun.misc.Unsafe.arrayIndexScale()