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require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper"))
describe FFI::Struct, ' with inline callback functions' do
it 'should be able to define inline callback field' do
module CallbackMember
extend FFI::Library
ffi_lib TestLibrary::PATH
DUMMY_CB = callback :dummy_cb, [ :int ], :int
class TestStruct < FFI::Struct
layout \
:add, callback([ :int, :int ], :int),
:sub, callback([ :int, :int ], :int),
:cb_with_cb_parameter, callback([ DUMMY_CB, :int ], :int)
end
attach_function :struct_call_add_cb, [TestStruct, :int, :int], :int
attach_function :struct_call_sub_cb, [TestStruct, :int, :int], :int
end
end
it 'should take methods as callbacks' do
module CallbackMember
extend FFI::Library
ffi_lib TestLibrary::PATH
class TestStruct < FFI::Struct
layout \
:add, callback([ :int, :int ], :int),
:sub, callback([ :int, :int ], :int)
end
attach_function :struct_call_add_cb, [TestStruct, :int, :int], :int
attach_function :struct_call_sub_cb, [TestStruct, :int, :int], :int
end
module StructCallbacks
def self.add a, b
a+b
end
end
ts = CallbackMember::TestStruct.new
ts[:add] = StructCallbacks.method(:add)
CallbackMember.struct_call_add_cb(ts, 1, 2).should == 3
end
it 'should return callable object from []' do
module CallbackMember
extend FFI::Library
ffi_lib TestLibrary::PATH
class TestStruct < FFI::Struct
layout \
:add, callback([ :int, :int ], :int),
:sub, callback([ :int, :int ], :int)
end
attach_function :struct_call_add_cb, [TestStruct, :int, :int], :int
attach_function :struct_call_sub_cb, [TestStruct, :int, :int], :int
end
s = CallbackMember::TestStruct.new
add = Proc.new { |a,b| a+b}
s[:add] = add
fn = s[:add]
fn.respond_to?(:call).should be_true
fn.call(1, 2).should == 3
end
end
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