org.jruby.ext.ffi.jffi

Class FFIUtil

java.lang.Object

org.jruby.ext.ffi.jffi.FFIUtil

public final class FFIUtil
extends java.lang.Object

Some utility functions for FFI <=> jffi conversions

Field Summary

Fields

Modifier and Type	Field and Description
private static com.kenai.jffi.MemoryIO	IO
private static java.util.Map<NativeType,com.kenai.jffi.Type>	typeMap

Constructor Summary

Constructors

Modifier	Constructor and Description
private	FFIUtil()

Method Summary

Modifier and Type	Method and Description
private static java.util.Map<NativeType,com.kenai.jffi.Type>	buildTypeMap()
private static com.kenai.jffi.Type	cacheFFIType(Type type)
(package private) static com.kenai.jffi.Type	getFFIType(NativeType type)
(package private) static com.kenai.jffi.Type	getFFIType(Type type)
(package private) static IRubyObject	getString(Ruby runtime, long address) Reads a nul-terminated string from native memory and boxes it up in a ruby string.
(package private) static com.kenai.jffi.Array	newArray(Type.Array arrayType) Creates a new JFFI type descriptor for an array
(package private) static com.kenai.jffi.Aggregate	newStruct(StructLayout layout) Creates a new JFFI Struct descriptor for a StructLayout

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

IO

private static final com.kenai.jffi.MemoryIO IO

typeMap

private static final java.util.Map<NativeType,com.kenai.jffi.Type> typeMap

Constructor Detail

FFIUtil

private FFIUtil()

Method Detail

buildTypeMap

private static final java.util.Map<NativeType,com.kenai.jffi.Type> buildTypeMap()

getFFIType

static final com.kenai.jffi.Type getFFIType(Type type)

cacheFFIType

private static com.kenai.jffi.Type cacheFFIType(Type type)

getFFIType

static final com.kenai.jffi.Type getFFIType(NativeType type)

newStruct

static final com.kenai.jffi.Aggregate newStruct(StructLayout layout)

Creates a new JFFI Struct descriptor for a StructLayout

Parameters:

layout - The structure layout

Returns:

A new Struct descriptor.

newArray

static com.kenai.jffi.Array newArray(Type.Array arrayType)

Creates a new JFFI type descriptor for an array

Parameters:

arrayType - The structure layout

Returns:

A new Struct descriptor.

getString

static final IRubyObject getString(Ruby runtime,
                                   long address)

Reads a nul-terminated string from native memory and boxes it up in a ruby string.

Parameters:

runtime - The ruby runtime for the resulting string.

address - The memory address to read the string from.

Returns:

A ruby string.