Created
April 29, 2011 13:47
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FFI internals 6
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require 'ffi' | |
module RubyInternals | |
extend FFI::Library | |
ffi_lib(FFI::CURRENT_PROCESS) | |
attach_variable :ptr_vm_core, :rb_mRubyVMFrozenCore, :pointer | |
attach_function :const_def_pointer, :rb_define_const, | |
[:pointer, :string, :pointer], :void | |
attach_variable :ptr_object_class, :rb_cObject, :pointer | |
const_def_pointer(ptr_object_class, "RubyCore", ptr_vm_core) | |
def define_iseq_singleton_method(mod,sel,iseq) | |
mod.module_eval do | |
RubyCore.send("core#define_singleton_method",mod,sel,iseq) | |
end | |
end | |
end | |
module Greeter | |
extend RubyInternals | |
iseq = RubyVM::InstructionSequence.compile <<-RUBY | |
puts "Hello, world." | |
RUBY | |
define_iseq_singleton_method(self,:greet,iseq) | |
end | |
Greeter.greet |
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