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require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper"))
require 'java' if RUBY_PLATFORM =~ /java/
describe "Managed Struct" do
include FFI
module LibTest
extend FFI::Library
ffi_lib TestLibrary::PATH
attach_function :ptr_from_address, [ FFI::Platform::ADDRESS_SIZE == 32 ? :uint : :ulong_long ], :pointer
end
it "should raise an error if release() is not defined" do
class NoRelease < FFI::ManagedStruct ; layout :i, :int; end
lambda { NoRelease.new(LibTest.ptr_from_address(0x12345678)) }.should raise_error(NoMethodError)
end
it "should be the right class" do
class WhatClassAmI < FFI::ManagedStruct
layout :i, :int
def self.release
end
end
WhatClassAmI.new(LibTest.ptr_from_address(0x12345678)).class.should == WhatClassAmI
end
it "should release memory properly" do
class PleaseReleaseMe < FFI::ManagedStruct
layout :i, :int
@@count = 0
def self.release
@@count += 1
end
def self.wait_gc(count)
loop = 5
while loop > 0 && @@count < count
loop -= 1
if RUBY_PLATFORM =~ /java/
java.lang.System.gc
else
GC.start
end
sleep 0.05 if @@count < count
end
end
end
loop_count = 30
wiggle_room = 5
PleaseReleaseMe.should_receive(:release).at_least(loop_count-wiggle_room).times
loop_count.times do
s = PleaseReleaseMe.new(LibTest.ptr_from_address(0x12345678))
end
PleaseReleaseMe.wait_gc loop_count
end
end
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