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Ensure GC-ing closures before fork #1124

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Ensure GC-ing closures before fork #1124

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11 changes: 9 additions & 2 deletions spec/ffi/callback_spec.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -856,8 +856,8 @@ module CallbackInteropSpecs
module LibTestFFI
extend FFI::Library
ffi_lib TestLibrary::PATH
attach_function :testCallbackVrV, :testClosureVrV, [ :pointer ], :void
attach_function :testCallbackVrV_blocking, :testClosureVrV, [ :pointer ], :void, blocking: true
@cb = attach_function :testCallbackVrV, :testClosureVrV, [ :pointer ], :void
@cb_blocking = attach_function :testCallbackVrV_blocking, :testClosureVrV, [ :pointer ], :void, blocking: true
end

module LibTestFiddle
Expand All @@ -866,6 +866,13 @@ module LibTestFiddle
extern 'void testClosureVrV(void *fp)'
end

after do
LibTestFFI.instance_variable_set(:@cb, nil)
LibTestFFI.instance_variable_set(:@cb_blocking, nil)
GC.start
expect(ObjectSpace.each_object(Fiddle::Closure) {}).to eq(0)
end

def assert_callback_in_same_thread_called_once
called = 0
thread = nil
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