src/impl-clozure.lisp

   1 ;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; 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 OpenMCL Threads interface can be found at
  12 ;;; http://openmcl.clozure.com/Doc/Programming-with-Threads.html
  13
  14 ;;; Thread Creation
  15
  16 (defun %make-thread (function name)
  17   (ccl:process-run-function name function))
  18
  19 (defun current-thread ()
  20   ccl:*current-process*)
  21
  22 (defun threadp (object)
  23   (typep object 'ccl:process))
  24
  25 (defun thread-name (thread)
  26   (ccl:process-name thread))
  27
  28 ;;; Resource contention: locks and recursive locks
  29
  30 (defun make-lock (&optional name)
  31   (ccl:make-lock (or name "Anonymous lock")))
  32
  33 (defun acquire-lock (lock &optional (wait-p t))
  34   (if wait-p
  35       (ccl:grab-lock lock)
  36       (ccl:try-lock lock)))
  37
  38 (defun release-lock (lock)
  39   (ccl:release-lock lock))
  40
  41 (defmacro with-lock-held ((place) &body body)
  42   `(ccl:with-lock-grabbed (,place)
  43      ,@body))
  44
  45 (defun make-recursive-lock (&optional name)
  46   (ccl:make-lock (or name "Anonymous recursive lock")))
  47
  48 (defun acquire-recursive-lock (lock)
  49   (ccl:grab-lock lock))
  50
  51 (defun release-recursive-lock (lock)
  52   (ccl:release-lock lock))
  53
  54 (defmacro with-recursive-lock-held ((place) &body body)
  55   `(ccl:with-lock-grabbed (,place)
  56      ,@body))
  57
  58 ;;; Resource contention: condition variables
  59
  60 (defun make-condition-variable (&key name)
  61   (declare (ignore name))
  62   (ccl:make-semaphore))
  63
  64 (defun condition-wait (condition-variable lock)
  65   (unwind-protect
  66        (progn
  67          (release-lock lock)
  68          (ccl:wait-on-semaphore condition-variable))
  69     (acquire-lock lock t)))
  70
  71 (defun condition-notify (condition-variable)
  72   (ccl:signal-semaphore condition-variable))
  73
  74 (defun thread-yield ()
  75   (ccl:process-allow-schedule))
  76
  77 ;;; Introspection/debugging
  78
  79 (defun all-threads ()
  80   (ccl:all-processes))
  81
  82 (defun interrupt-thread (thread function)
  83   (ccl:process-interrupt thread function))
  84
  85 (defun destroy-thread (thread)
  86   (signal-error-if-current-thread thread)
  87   (ccl:process-kill thread))
  88
  89 (defun thread-alive-p (thread)
  90   (ccl::process-active-p thread))
  91
  92 (defun join-thread (thread)
  93   (ccl:join-process thread))
  94
  95 (mark-supported)