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#
# This file is part of ruby-ffi.
# For licensing, see LICENSE.SPECS
#
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
expect(module CallbackMember1
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).to be_an_instance_of FFI::Function
end
it 'should take methods as callbacks' do
module CallbackMember2
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 = CallbackMember2::TestStruct.new
ts[:add] = StructCallbacks.method(:add)
expect(CallbackMember2.struct_call_add_cb(ts, 1, 2)).to eq(3)
end
it 'should return callable object from []' do
module CallbackMember3
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 = CallbackMember3::TestStruct.new
add = Proc.new { |a,b| a+b}
s[:add] = add
fn = s[:add]
expect(fn.respond_to?(:call)).to be true
expect(fn.call(1, 2)).to eq(3)
end
it "callback returning :string is rejected in struct" do
expect {
Class.new(FFI::Struct) do
layout :function1, callback([:int, :int], :string)
end
}.to raise_error(TypeError)
end
end
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