apiv1/impl-scl.lisp

   1 ;;;; -*- indent-tabs-mode: nil -*-
   2
   3 #|
   4 Copyright 2008 Scieneer Pty Ltd
   5
   6 Distributed under the MIT license (see LICENSE file)
   7 |#
   8
   9 (in-package #:bordeaux-threads)
  10
  11 (deftype thread ()
  12   'thread:thread)
  13
  14 (defun %make-thread (function name)
  15   (thread:thread-create function :name name))
  16
  17 (defun current-thread ()
  18   thread:*thread*)
  19
  20 (defun threadp (object)
  21   (typep object 'thread:thread))
  22
  23 (defun thread-name (thread)
  24   (thread:thread-name thread))
  25
  26 ;;; Resource contention: locks and recursive locks
  27
  28 (deftype lock () 'thread:lock)
  29
  30 (deftype recursive-lock () 'thread:recursive-lock)
  31
  32 (defun lock-p (object)
  33   (typep object 'thread:lock))
  34
  35 (defun recursive-lock-p (object)
  36   (typep object 'thread:recursive-lock))
  37
  38 (defun make-lock (&optional name)
  39   (thread:make-lock (or name "Anonymous lock")))
  40
  41 (defun acquire-lock (lock &optional (wait-p t))
  42   (thread::acquire-lock lock nil wait-p))
  43
  44 (defun release-lock (lock)
  45   (thread::release-lock lock))
  46
  47 (defmacro with-lock-held ((place) &body body)
  48   `(thread:with-lock-held (,place) ,@body))
  49
  50 (defun make-recursive-lock (&optional name)
  51   (thread:make-lock (or name "Anonymous recursive lock")
  52                     :type :recursive))
  53
  54 ;;; XXX acquire-recursive-lock and release-recursive-lock are actually
  55 ;;; complicated because we can't use control stack tricks.  We need to
  56 ;;; actually count something to check that the acquire/releases are
  57 ;;; balanced
  58
  59 (defmacro with-recursive-lock-held ((place) &body body)
  60   `(thread:with-lock-held (,place)
  61      ,@body))
  62
  63 ;;; Resource contention: condition variables
  64
  65 (defun make-condition-variable (&key name)
  66   (thread:make-cond-var (or name "Anonymous condition variable")))
  67
  68 (defun condition-wait (condition-variable lock &key timeout)
  69   (if timeout
  70       (thread:cond-var-timedwait condition-variable lock timeout)
  71       (thread:cond-var-wait condition-variable lock))
  72   t)
  73
  74 (defun condition-notify (condition-variable)
  75   (thread:cond-var-broadcast condition-variable))
  76
  77 (defun thread-yield ()
  78   (mp:process-yield))
  79
  80 ;;; Introspection/debugging
  81
  82 (defun all-threads ()
  83   (mp:all-processes))
  84
  85 (defun interrupt-thread (thread function &rest args)
  86   (flet ((apply-function ()
  87            (if args
  88                (named-lambda %interrupt-thread-wrapper ()
  89                  (apply function args))
  90                function)))
  91     (declare (dynamic-extent #'apply-function))
  92     (thread:thread-interrupt thread (apply-function))))
  93
  94 (defun destroy-thread (thread)
  95   (thread:destroy-thread thread))
  96
  97 (defun thread-alive-p (thread)
  98   (mp:process-alive-p thread))
  99
 100 (defun join-thread (thread)
 101   (mp:process-wait (format nil "Waiting for thread ~A to complete" thread)
 102                    (named-lambda %thread-completedp ()
 103                      (not (mp:process-alive-p thread)))))
 104
 105 (mark-supported)