timpl-clozure.lisp - clic - Clic is an command line interactive client for gopher written in Common LISP
 (HTM) git clone git://bitreich.org/clic/ git://hg6vgqziawt5s4dj.onion/clic/
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       timpl-clozure.lisp (3061B)
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            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 OpenMCL Threads interface can be found at
           12 ;;; http://openmcl.clozure.com/Doc/Programming-with-Threads.html
           13 
           14 (deftype thread ()
           15   'ccl:process)
           16 
           17 ;;; Thread Creation
           18 
           19 (defun %make-thread (function name)
           20   (ccl:process-run-function name function))
           21 
           22 (defun current-thread ()
           23   ccl:*current-process*)
           24 
           25 (defun threadp (object)
           26   (typep object 'ccl:process))
           27 
           28 (defun thread-name (thread)
           29   (ccl:process-name thread))
           30 
           31 ;;; Resource contention: locks and recursive locks
           32 
           33 (deftype lock () 'ccl:lock)
           34 
           35 (deftype recursive-lock () 'ccl:lock)
           36 
           37 (defun lock-p (object)
           38   (typep object 'ccl:lock))
           39 
           40 (defun recursive-lock-p (object)
           41   (typep object 'ccl:lock))
           42 
           43 (defun make-lock (&optional name)
           44   (ccl:make-lock (or name "Anonymous lock")))
           45 
           46 (defun acquire-lock (lock &optional (wait-p t))
           47   (if wait-p
           48       (ccl:grab-lock lock)
           49       (ccl:try-lock lock)))
           50 
           51 (defun release-lock (lock)
           52   (ccl:release-lock lock))
           53 
           54 (defmacro with-lock-held ((place) &body body)
           55   `(ccl:with-lock-grabbed (,place)
           56      ,@body))
           57 
           58 (defun make-recursive-lock (&optional name)
           59   (ccl:make-lock (or name "Anonymous recursive lock")))
           60 
           61 (defun acquire-recursive-lock (lock)
           62   (ccl:grab-lock lock))
           63 
           64 (defun release-recursive-lock (lock)
           65   (ccl:release-lock lock))
           66 
           67 (defmacro with-recursive-lock-held ((place) &body body)
           68   `(ccl:with-lock-grabbed (,place)
           69      ,@body))
           70 
           71 ;;; Resource contention: condition variables
           72 
           73 (defun make-condition-variable (&key name)
           74   (declare (ignore name))
           75   (ccl:make-semaphore))
           76 
           77 (defun condition-wait (condition-variable lock &key timeout)
           78   (release-lock lock)
           79   (unwind-protect
           80        (if timeout
           81            (ccl:timed-wait-on-semaphore condition-variable timeout)
           82            (ccl:wait-on-semaphore condition-variable))
           83     (acquire-lock lock t))
           84   t)
           85 
           86 (defun condition-notify (condition-variable)
           87   (ccl:signal-semaphore condition-variable))
           88 
           89 (defun thread-yield ()
           90   (ccl:process-allow-schedule))
           91 
           92 ;;; Semaphores
           93 
           94 (deftype semaphore ()
           95   'ccl:semaphore)
           96 
           97 (defun make-semaphore (&key name (count 0))
           98   (declare (ignore name))
           99   (let ((semaphore (ccl:make-semaphore)))
          100     (dotimes (c count) (ccl:signal-semaphore semaphore))
          101     semaphore))
          102 
          103 (defun signal-semaphore (semaphore &key (count 1))
          104   (dotimes (c count) (ccl:signal-semaphore semaphore)))
          105 
          106 (defun wait-on-semaphore (semaphore &key timeout)
          107   (if timeout
          108       (ccl:timed-wait-on-semaphore semaphore timeout)
          109       (ccl:wait-on-semaphore semaphore)))
          110 
          111 ;;; Introspection/debugging
          112 
          113 (defun all-threads ()
          114   (ccl:all-processes))
          115 
          116 (defun interrupt-thread (thread function &rest args)
          117   (declare (dynamic-extent args))
          118   (apply #'ccl:process-interrupt thread function args))
          119 
          120 (defun destroy-thread (thread)
          121   (signal-error-if-current-thread thread)
          122   (ccl:process-kill thread))
          123 
          124 (defun thread-alive-p (thread)
          125   (not (ccl:process-exhausted-p thread)))
          126 
          127 (defun join-thread (thread)
          128   (ccl:join-process thread))
          129 
          130 (mark-supported)