(cond-expand
 (modules (import (srfi 18) (chibi test)))
 (else #f))

(test-begin "threads")

(test "no threads" 'ok (begin 'ok))

(test "unstarted thread" 'ok
  (let ((t (make-thread (lambda () (error "oops"))))) 'ok))

(test "ignored thread terminates" 'ok
  (let ((t (make-thread (lambda () 'oops)))) (thread-start! t) 'ok))

(test "ignored thread hangs" 'ok
  (let ((t (make-thread (lambda () (let lp () (lp))))))
    (thread-start! t)
    'ok))

(test "joined thread terminates" 'ok
  (let ((t (make-thread (lambda () 'oops))))
    (thread-start! t)
    (thread-join! t)
    'ok))

(test "joined thread hangs, timeout" 'timeout
  (let ((t (make-thread (lambda () (let lp () (lp))))))
    (thread-start! t)
    (thread-join! t 0.1 'timeout)))

(test "basic mutex" 'ok
  (let ((m (make-mutex)))
    (and (mutex? m) 'ok)))

(test "mutex unlock" 'ok
  (let ((m (make-mutex)))
    (and (mutex-unlock! m) 'ok)))

(test "mutex lock/unlock" 'ok
  (let ((m (make-mutex)))
    (and (mutex-lock! m)
         (mutex-unlock! m)
         'ok)))

(test "mutex lock/lock" 'timeout
  (let ((m (make-mutex)))
    (and (mutex-lock! m)
         (if (mutex-lock! m 0.1) 'fail 'timeout))))

(test "mutex lock timeout" 'timeout
  (let* ((m (make-mutex))
         (t (make-thread (lambda () (mutex-lock! m)))))
    (thread-start! t)
    (thread-yield!)
    (if (mutex-lock! m 0.1) 'fail 'timeout)))

(test "mutex lock/unlock/lock/lock" 'timeout
  (let* ((m (make-mutex))
         (t (make-thread (lambda () (mutex-unlock! m)))))
    (mutex-lock! m)
    (thread-start! t)
    (if (mutex-lock! m 0.1)
        (if (mutex-lock! m 0.1) 'fail-second 'timeout)
        'bad-timeout)))

(test "thread-join! end result" 5
  (let* ((th (make-thread (lambda () (+ 3 2)))))
    (thread-start! th)
    (thread-join! th)))

(test-error "thread-join! exception"
  (let* ((th (make-thread (lambda () (+ 3 "2")))))
    (thread-start! th)
    (thread-join! th)))

(test-assert "make-condition-variable"
  (condition-variable? (make-condition-variable)))

(test "condition-variable signal" 'ok
  (let* ((mutex (make-mutex))
         (cndvar (make-condition-variable))
         (th (make-thread
              (lambda ()
                (if (mutex-unlock! mutex cndvar 0.1) 'ok 'timeout1)))))
    (thread-start! th)
    (thread-yield!)
    (condition-variable-signal! cndvar)
    (thread-join! th 0.1 'timeout2)))

(test "condition-variable broadcast" '(ok1 ok2)
  (let* ((mutex (make-mutex))
         (cndvar (make-condition-variable))
         (th1 (make-thread
               (lambda ()
                 (mutex-lock! mutex)
                 (if (mutex-unlock! mutex cndvar 1.0) 'ok1 'timeout1))))
         (th2 (make-thread
               (lambda ()
                 (mutex-lock! mutex)
                 (if (mutex-unlock! mutex cndvar 1.0) 'ok2 'timeout2)))))
    (thread-start! th1)
    (thread-start! th2)
    (thread-yield!)
    (mutex-lock! mutex)
    (condition-variable-broadcast! cndvar)
    (mutex-unlock! mutex)
    (list (thread-join! th1 0.1 'timeout3)
          (thread-join! th2 0.1 'timeout4))))

(test-end)