Memory cleaning

[matheusdiogenesandrade]

Hello.

I am trying to promote further analysis on the memory management, and, at the moment, I am looking for the snippets responsible for calling the end() function (cf. here and here for the C++ API reference) of the Cplex C API in the julia code. I would like to know if someone could point me such snippets.

Thanks and regards.

[odow]

CPLEX.jl does not use the C+++ API, so it does not call end().

Objects are freed via a finalizer that runs when Julia's GC frees the associated CPLEX Model or Env

CPLEX.jl/src/MOI/MOI_wrapper.jl

Lines 88 to 95 in 6e0fdaf

	finalizer(env) do e
	e.finalize_called = true
	if e.attached_models == 0
	# Only finalize the model if there are no models using it.
	CPXcloseCPLEX(Ref(e.ptr))
	e.ptr = C_NULL
	end
	end

CPLEX.jl/src/MOI/MOI_wrapper.jl

Lines 284 to 297 in 6e0fdaf

	finalizer(model) do m
	ret = CPXfreeprob(m.env, Ref(m.lp))
	_check_ret(m, ret)
	m.env.attached_models -= 1
	if env === nothing
	# We created this env. Finalize it now
	finalize(m.env)
	elseif m.env.finalize_called && m.env.attached_models == 0
	# We delayed finalizing `m.env` earlier because there were still
	# models attached. Finalize it now.
	CPXcloseCPLEX(Ref(m.env.ptr))
	m.env.ptr = C_NULL
	end
	end

I assume this questions is related to https://discourse.julialang.org/t/memory-management-in-cplex-jl/109704. I don't have any suggestions other than what I mentioned there.

[matheusdiogenesandrade]

Thank you very much, that is exactly what I am looking for.