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;; This file is part of scheme-GNUnet.
;; Copyright (C) 2021 Maxime Devos
;;
;; scheme-GNUnet is free software: you can redistribute it and/or modify it
;; under the terms of the GNU Affero General Public License as published
;; by the Free Software Foundation, either version 3 of the License,
;; or (at your option) any later version.
;;
;; scheme-GNUnet is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; Affero General Public License for more details.
;;
;; You should have received a copy of the GNU Affero General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;
;; SPDX-License-Identifier: AGPL3.0-or-later
(import (gnu gnunet concurrency repeated-condition)
(gnu gnunet utils hat-let)
(fibers operations)
(fibers conditions)
(fibers timers)
(fibers)
(srfi srfi-43))
;; Copied from 'tests/update.scm'.
;; TODO abstract this?
(define expected-blocking-operation
(wrap-operation (sleep-operation 1e-4)
(lambda () 'blocking)))
;; First some basic sequential tests, ignoring memory ordering
;; issues and other concurrency.
(test-begin "repeated condition")
(test-assert "repeated conditions are condition?"
(repeated-condition? (make-repeated-condition)))
(test-equal "initially, await-trigger! blocks"
'(blocking)
(let^ ((<-- (rcvar) (make-repeated-condition))
(<-- (operation) (prepare-await-trigger! rcvar)))
(call-with-values
(lambda ()
(perform-operation
(choice-operation operation expected-blocking-operation)))
list)))
(test-assert "trigger-condition! & await-trigger! completes, sequential"
(let^ ((<-- (rcvar) (make-repeated-condition))
(<-- () (trigger-condition! rcvar))
(<-- () (await-trigger! rcvar)))
#t))
(test-assert "likewise, but multiple times"
(let^ ((<-- (rcvar) (make-repeated-condition))
(/o/ loop (todo 10))
(<-- () (trigger-condition! rcvar))
(<-- () (await-trigger! rcvar))
(? (> todo 1)
(loop (- todo 1))))
#t))
(test-assert "likewise, but prepare awaiting the trigger before triggering"
(let^ ((<-- (rcvar) (make-repeated-condition))
(<-- (operation) (prepare-await-trigger! rcvar))
(<-- () (trigger-condition! rcvar))
(<-- () (perform-operation operation)))
#t))
;; This is a departure from fiber's conditions:
;; ‘repeated conditions’ are re-usable.
(test-equal "await-trigger! hangs the second time (without trigger-condition!)"
'(blocking)
(let^ ((<-- (rcvar) (make-repeated-condition))
(<-- () (trigger-condition! rcvar))
(<-- () (await-trigger! rcvar))
(<-- (operation) (prepare-await-trigger! rcvar)))
(call-with-values
(lambda ()
(perform-operation
(choice-operation operation expected-blocking-operation)))
list)))
;; Now some concurrency tests.
;;
;; This test was meant to detect the absence of
;; (? (not next-old) (spin next-old)))
;;
;; but I didn't ever notice 'spin' being run.
;; (Try adding a 'pk' before 'spin').
(test-assert "concurrent ping pong completes"
(let^ ((! n/games 400)
(! n/rounds 500)
(! game/done?
(vector-unfold (lambda (_) (make-condition)) n/games))
(! start? (make-condition))
(! (run-game done?)
;; In each round, concurrently ‘await’
;; and ‘trigger’ the condition. The result
;; should be that the round eventually
;; is completed.
(let^ ((! rcvar (make-repeated-condition))
(/o/ loop (round 0))
(! (next-round) (loop (+ round 1)))
(? (= round n/rounds)
(signal-condition! done?))
(! start-round? (make-condition))
(! awaiter-done? (make-condition))
(! trigger-done? (make-condition))
(<-- ()
(spawn-fiber
(lambda ()
(wait start-round?)
(await-trigger! rcvar)
(signal-condition! awaiter-done?))))
(<-- ()
(spawn-fiber
(lambda ()
(wait start-round?)
(trigger-condition! rcvar)
(signal-condition! trigger-done?))))
(<-- (_) (signal-condition! start-round?))
(<-- () (wait awaiter-done?))
(<-- () (wait trigger-done?)))
(next-round)))
(! (spawn-game _ done?)
(spawn-fiber
(lambda ()
(wait start?)
(run-game done?)))))
(run-fibers
(lambda ()
(vector-for-each spawn-game game/done?)
(signal-condition! start?)
(vector-for-each (lambda (_ c) (wait c)) game/done?)
#t)
#:hz 6000)))
(test-end "repeated condition")
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