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worm

1.0.5
1.0.5 1.0.4 1.0.3

A library for caching deterministic calculations in Gleam

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worm src worm_ffi.erl
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src/worm_ffi.erl 

-module(worm_ffi).

-compile([no_auto_import]).



-export([persist/1]).



persist(Gen) ->

	{ _, GenModule } = erlang:fun_info(Gen, module),

	{ _, GenName } = erlang:fun_info(Gen, name),

	Name = { ?MODULE, GenModule, GenName },

	case catch persistent_term:get(Name) of

		{ 'EXIT', { badarg, _ } } -> 

			Value = Gen(),

			try

				{ ok, Value2 } = persistent_term:get(Name),

				Value2

			catch

				error:badarg:_ ->

					persistent_term:put(Name, { ok, Value }),

					Value

			end;

		{ ok, Value } -> Value

	end.