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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::Function do
module LibTest
extend FFI::Library
ffi_lib TestLibrary::PATH
attach_function :testFunctionAdd, [:int, :int, :pointer], :int
end
before do
@libtest = FFI::DynamicLibrary.open(TestLibrary::PATH,
FFI::DynamicLibrary::RTLD_LAZY | FFI::DynamicLibrary::RTLD_GLOBAL)
end
it 'is initialized with a signature and a block' do
fn = FFI::Function.new(:int, []) { 5 }
expect(fn.call).to eql 5
end
it 'raises an error when passing a wrong signature' do
expect { FFI::Function.new([], :int).new { } }.to raise_error TypeError
end
it 'returns a native pointer' do
expect(FFI::Function.new(:int, []) { }).to be_a_kind_of FFI::Pointer
end
it 'can be used as callback from C passing to it a block' do
function_add = FFI::Function.new(:int, [:int, :int]) { |a, b| a + b }
expect(LibTest.testFunctionAdd(10, 10, function_add)).to eq(20)
end
it 'can be used as callback from C passing to it a Proc object' do
function_add = FFI::Function.new(:int, [:int, :int], Proc.new { |a, b| a + b })
expect(LibTest.testFunctionAdd(10, 10, function_add)).to eq(20)
end
it 'can be used to wrap an existing function pointer' do
expect(FFI::Function.new(:int, [:int, :int], @libtest.find_function('testAdd')).call(10, 10)).to eq(20)
end
it 'can be attached to a module' do
module Foo; end
fp = FFI::Function.new(:int, [:int, :int], @libtest.find_function('testAdd'))
fp.attach(Foo, 'add')
expect(Foo.add(10, 10)).to eq(20)
end
it 'can be used to extend an object' do
fp = FFI::Function.new(:int, [:int, :int], @libtest.find_function('testAdd'))
foo = Object.new
class << foo
def singleton_class
class << self; self; end
end
end
fp.attach(foo.singleton_class, 'add')
expect(foo.add(10, 10)).to eq(20)
end
it 'can wrap a blocking function' do
fp = FFI::Function.new(:void, [ :int ], @libtest.find_function('testBlocking'), :blocking => true)
threads = 10.times.map do |x|
Thread.new do
time = Time.now
fp.call(2)
expect(Time.now - time).to be >= 2
end
end
threads.each { |t| t.join }
end
it 'autorelease flag is set to true by default' do
fp = FFI::Function.new(:int, [:int, :int], @libtest.find_function('testAdd'))
expect(fp.autorelease?).to be true
end
it 'can explicity free itself' do
fp = FFI::Function.new(:int, []) { }
fp.free
expect { fp.free }.to raise_error RuntimeError
end
it 'can\'t explicity free itself if not previously allocated' do
fp = FFI::Function.new(:int, [:int, :int], @libtest.find_function('testAdd'))
expect { fp.free }.to raise_error RuntimeError
end
end
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