mirror of
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03e4ab0d58
* src/thread.c (lisp_mutex_lock, lisp_mutex_unlock) (lisp_mutex_unlock_for_wait, condition_wait_callback) (condition_notify_callback): Improve commentary. (condition_wait_callback): Call post_acquire_global_lock before attempting to lock the mutex, to make sure the lock's owner is recorded correctly. * test/src/thread-tests.el (threads-condvar-wait): New test.
288 lines
8.3 KiB
EmacsLisp
288 lines
8.3 KiB
EmacsLisp
;;; threads.el --- tests for threads.
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;; Copyright (C) 2012-2017 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(ert-deftest threads-is-one ()
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"test for existence of a thread"
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(should (current-thread)))
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(ert-deftest threads-threadp ()
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"test of threadp"
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(should (threadp (current-thread))))
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(ert-deftest threads-type ()
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"test of thread type"
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(should (eq (type-of (current-thread)) 'thread)))
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(ert-deftest threads-name ()
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"test for name of a thread"
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(should
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(string= "hi bob" (thread-name (make-thread #'ignore "hi bob")))))
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(ert-deftest threads-alive ()
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"test for thread liveness"
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(should
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(thread-alive-p (make-thread #'ignore))))
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(ert-deftest threads-all-threads ()
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"simple test for all-threads"
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(should (listp (all-threads))))
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(defvar threads-test-global nil)
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(defun threads-test-thread1 ()
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(setq threads-test-global 23))
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(ert-deftest threads-basic ()
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"basic thread test"
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(should
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(progn
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(setq threads-test-global nil)
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(make-thread #'threads-test-thread1)
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(while (not threads-test-global)
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(thread-yield))
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threads-test-global)))
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(ert-deftest threads-join ()
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"test of thread-join"
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(should
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(progn
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(setq threads-test-global nil)
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(let ((thread (make-thread #'threads-test-thread1)))
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(thread-join thread)
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(and threads-test-global
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(not (thread-alive-p thread)))))))
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(ert-deftest threads-join-self ()
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"cannot thread-join the current thread"
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(should-error (thread-join (current-thread))))
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(defvar threads-test-binding nil)
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(defun threads-test-thread2 ()
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(let ((threads-test-binding 23))
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(thread-yield))
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(setq threads-test-global 23))
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(ert-deftest threads-let-binding ()
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"simple test of threads and let bindings"
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(should
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(progn
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(setq threads-test-global nil)
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(make-thread #'threads-test-thread2)
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(while (not threads-test-global)
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(thread-yield))
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(and (not threads-test-binding)
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threads-test-global))))
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(ert-deftest threads-mutexp ()
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"simple test of mutexp"
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(should-not (mutexp 'hi)))
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(ert-deftest threads-mutexp-2 ()
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"another simple test of mutexp"
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(should (mutexp (make-mutex))))
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(ert-deftest threads-mutex-type ()
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"type-of mutex"
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(should (eq (type-of (make-mutex)) 'mutex)))
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(ert-deftest threads-mutex-lock-unlock ()
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"test mutex-lock and unlock"
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(should
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(let ((mx (make-mutex)))
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(mutex-lock mx)
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(mutex-unlock mx)
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t)))
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(ert-deftest threads-mutex-recursive ()
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"test mutex-lock and unlock"
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(should
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(let ((mx (make-mutex)))
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(mutex-lock mx)
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(mutex-lock mx)
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(mutex-unlock mx)
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(mutex-unlock mx)
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t)))
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(defvar threads-mutex nil)
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(defvar threads-mutex-key nil)
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(defun threads-test-mlock ()
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(mutex-lock threads-mutex)
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(setq threads-mutex-key 23)
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(while threads-mutex-key
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(thread-yield))
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(mutex-unlock threads-mutex))
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(ert-deftest threads-mutex-contention ()
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"test of mutex contention"
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(should
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(progn
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(setq threads-mutex (make-mutex))
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(setq threads-mutex-key nil)
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(make-thread #'threads-test-mlock)
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;; Wait for other thread to get the lock.
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(while (not threads-mutex-key)
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(thread-yield))
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;; Try now.
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(setq threads-mutex-key nil)
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(mutex-lock threads-mutex)
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(mutex-unlock threads-mutex)
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t)))
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(defun threads-test-mlock2 ()
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(setq threads-mutex-key 23)
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(mutex-lock threads-mutex))
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(ert-deftest threads-mutex-signal ()
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"test signaling a blocked thread"
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(should
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(progn
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(setq threads-mutex (make-mutex))
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(setq threads-mutex-key nil)
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(mutex-lock threads-mutex)
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(let ((thr (make-thread #'threads-test-mlock2)))
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(while (not threads-mutex-key)
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(thread-yield))
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(thread-signal thr 'quit nil)
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(thread-join thr))
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t)))
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(defun threads-test-io-switch ()
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(setq threads-test-global 23))
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(ert-deftest threads-io-switch ()
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"test that accept-process-output causes thread switch"
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(should
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(progn
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(setq threads-test-global nil)
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(make-thread #'threads-test-io-switch)
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(while (not threads-test-global)
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(accept-process-output nil 1))
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threads-test-global)))
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(ert-deftest threads-condvarp ()
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"simple test of condition-variable-p"
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(should-not (condition-variable-p 'hi)))
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(ert-deftest threads-condvarp-2 ()
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"another simple test of condition-variable-p"
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(should (condition-variable-p (make-condition-variable (make-mutex)))))
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(ert-deftest threads-condvar-type ()
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"type-of condvar"
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(should (eq (type-of (make-condition-variable (make-mutex)))
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'condition-variable)))
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(ert-deftest threads-condvar-mutex ()
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"simple test of condition-mutex"
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(should
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(let ((m (make-mutex)))
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(eq m (condition-mutex (make-condition-variable m))))))
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(ert-deftest threads-condvar-name ()
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"simple test of condition-name"
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(should
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(eq nil (condition-name (make-condition-variable (make-mutex))))))
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(ert-deftest threads-condvar-name-2 ()
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"another simple test of condition-name"
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(should
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(string= "hi bob"
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(condition-name (make-condition-variable (make-mutex)
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"hi bob")))))
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(defun call-error ()
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"Call `error'."
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(error "Error is called"))
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;; This signals an error internally; the error should be caught.
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(defun thread-custom ()
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(defcustom thread-custom-face 'highlight
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"Face used for thread customizations."
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:type 'face
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:group 'widget-faces))
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(ert-deftest thread-errors ()
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"Test what happens when a thread signals an error."
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(should (threadp (make-thread #'call-error "call-error")))
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(should (threadp (make-thread #'thread-custom "thread-custom"))))
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(ert-deftest thread-sticky-point ()
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"Test bug #25165 with point movement in cloned buffer."
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(with-temp-buffer
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(insert "Lorem ipsum dolor sit amet, consectetur adipiscing elit.")
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(goto-char (point-min))
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(clone-indirect-buffer nil nil)
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(forward-char 20)
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(sit-for 1)
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(should (= (point) 21))))
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(ert-deftest thread-signal-early ()
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"Test signaling a thread as soon as it is started by the OS."
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(let ((thread
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(make-thread #'(lambda ()
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(while t (thread-yield))))))
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(thread-signal thread 'error nil)
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(sit-for 1)
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(should-not (thread-alive-p thread))))
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(defvar threads-condvar nil)
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(defun threads-test-condvar-wait ()
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;; Wait for condvar to be notified
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(mutex-lock (condition-mutex threads-condvar))
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(condition-wait threads-condvar)
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(mutex-unlock (condition-mutex threads-condvar))
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;; Wait again, it will be signaled.
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(with-mutex (condition-mutex threads-condvar)
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(condition-wait threads-condvar)))
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(ert-deftest threads-condvar-wait ()
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"test waiting on conditional variable"
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(let* ((cv-mutex (make-mutex))
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(nthreads (length (all-threads)))
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new-thread)
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(setq threads-condvar (make-condition-variable cv-mutex))
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(setq new-thread (make-thread #'threads-test-condvar-wait))
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(while (not (eq (thread--blocker new-thread) threads-condvar))
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(thread-yield))
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(should (thread-alive-p new-thread))
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(should (= (length (all-threads)) (1+ nthreads)))
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;; Notify the waiting thread.
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(with-mutex cv-mutex
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(condition-notify threads-condvar t))
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;; Allow new-thread to process the notification.
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(sleep-for 0.1)
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;; Make sure the thread is still there. This used to fail due to
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;; a bug in condition_wait_callback.
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(should (thread-alive-p new-thread))
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(should (= (length (all-threads)) (1+ nthreads)))
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(should (memq new-thread (all-threads)))
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;; Make sure the other thread waits at the condition variable again.
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(should (eq (thread--blocker new-thread) threads-condvar))
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;; Signal the thread.
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(thread-signal new-thread 'error '("Die, die, die!"))
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(sleep-for 0.1)
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;; Make sure the thread died.
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(should (= (length (all-threads)) nthreads))))
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;;; threads.el ends here
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