Package org.jruby.ext.ffi

Class StructLayout.Member

java.lang.Object

org.jruby.ext.ffi.StructLayout.Member

Enclosing class:

StructLayout

public static final class StructLayout.Member
extends Object

A struct member. This defines the offset within a chunk of memory to use when reading/writing the member, as well as how to convert between the native representation of the member and the JRuby representation.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Member(StructLayout.Field f, int index, int cacheIndex, int referenceIndex)	Initializes a new Member instance

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
final IRubyObject	get(ThreadContext context, StructLayout.Storage cache, AbstractMemory ptr)	Reads a ruby value from the struct member.
int	hashCode()
final int	offset()
final void	put(ThreadContext context, StructLayout.Storage cache, AbstractMemory ptr, IRubyObject value)	Writes a ruby value to the native struct member as the appropriate native value.
final Type	type()

Methods inherited from class java.lang.Object

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

Constructor Details

Member

protected Member(StructLayout.Field f,
 int index,
 int cacheIndex,
 int referenceIndex)

Initializes a new Member instance

Method Details

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

put

public final void put(ThreadContext context,
 StructLayout.Storage cache,
 AbstractMemory ptr,
 IRubyObject value)

Writes a ruby value to the native struct member as the appropriate native value.

Parameters:

context - the current context

cache - The value cache

ptr - The struct memory area.

value - The ruby value to write to the native struct member.

get

public final IRubyObject get(ThreadContext context,
 StructLayout.Storage cache,
 AbstractMemory ptr)

Reads a ruby value from the struct member.

Parameters:

cache - The cache used to store

ptr - The struct memory area.

Returns:

A ruby object equivalent to the native member value.

offset

public final int offset()

type

public final Type type()