apiv1/impl-clasp.lisp

   1 ;;;; -*- indent-tabs-mode: nil -*-
   2
   3 #|
   4 Copyright 2006, 2007 Greg Pfeil
   5
   6 Distributed under the MIT license (see LICENSE file)
   7 |#
   8
   9 (in-package #:bordeaux-threads)
  10
  11 ;;; documentation on the ECL Multiprocessing interface can be found at
  12 ;;; http://ecls.sourceforge.net/cgi-bin/view/Main/MultiProcessing
  13
  14 (deftype thread ()
  15   'mp:process)
  16
  17 ;;; Thread Creation
  18
  19 (defun %make-thread (function name)
  20   (mp:process-run-function name function bordeaux-threads:*default-special-bindings*))
  21
  22 (defun current-thread ()
  23   mp:*current-process*)
  24
  25 (defun threadp (object)
  26   (typep object 'mp:process))
  27
  28 (defun thread-name (thread)
  29   (mp:process-name thread))
  30
  31 ;;; Resource contention: locks and recursive locks
  32
  33 (deftype lock () 'mp:mutex)
  34
  35 (deftype recursive-lock ()
  36   '(and mp:mutex (satisfies mp:recursive-lock-p)))
  37
  38 (defun lock-p (object)
  39   (typep object 'mp:mutex))
  40
  41 (defun recursive-lock-p (object)
  42   (and (typep object 'mp:mutex)
  43        (mp:recursive-lock-p object)))
  44
  45 (defun make-lock (&optional name)
  46   (mp:make-lock :name (or name :anonymous)))
  47
  48 (defun acquire-lock (lock &optional (wait-p t))
  49   (mp:get-lock lock wait-p))
  50
  51 (defun release-lock (lock)
  52   (mp:giveup-lock lock))
  53
  54
  55 (defmacro with-lock-held ((place) &body body)
  56   `(mp:with-lock (,place) ,@body))
  57
  58 (defun make-recursive-lock (&optional name)
  59   (mp:make-recursive-mutex (or name :anonymous-recursive-lock)))
  60
  61 (defun acquire-recursive-lock (lock &optional (wait-p t))
  62   (mp:get-lock lock wait-p))
  63
  64 (defun release-recursive-lock (lock)
  65   (mp:giveup-lock lock))
  66
  67 (defmacro with-recursive-lock-held ((place) &body body)
  68   `(mp:with-lock (,place) ,@body))
  69
  70 ;;; Resource contention: condition variables
  71
  72 (defun make-condition-variable (&key name)
  73   (declare (ignore name))
  74   (mp:make-condition-variable))
  75
  76 (defun condition-wait (condition-variable lock &key timeout)
  77   (if timeout
  78       (mp:condition-variable-timedwait condition-variable lock timeout)
  79       (mp:condition-variable-wait condition-variable lock))
  80   t)
  81
  82 (defun condition-notify (condition-variable)
  83   (mp:condition-variable-signal condition-variable))
  84
  85 (defun thread-yield ()
  86   (mp:process-yield))
  87
  88 ;;; Introspection/debugging
  89
  90 (defun all-threads ()
  91   (mp:all-processes))
  92
  93 (defun interrupt-thread (thread function &rest args)
  94   (flet ((apply-function ()
  95            (if args
  96                (named-lambda %interrupt-thread-wrapper ()
  97                  (apply function args))
  98                function)))
  99     (declare (dynamic-extent #'apply-function))
 100     (mp:interrupt-process thread (apply-function))))
 101
 102 (defun destroy-thread (thread)
 103   (signal-error-if-current-thread thread)
 104   (mp:process-kill thread))
 105
 106 (defun thread-alive-p (thread)
 107   (mp:process-active-p thread))
 108
 109 (defun join-thread (thread)
 110   (mp:process-join thread))
 111
 112 (mark-supported)