timpl-sbcl.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-sbcl.lisp (3462B)
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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 SBCL Threads interface can be found at
           12 ;;; http://www.sbcl.org/manual/Threading.html
           13 
           14 (deftype thread ()
           15   'sb-thread:thread)
           16 
           17 ;;; Thread Creation
           18 
           19 (defun %make-thread (function name)
           20   (sb-thread:make-thread function :name name))
           21 
           22 (defun current-thread ()
           23   sb-thread:*current-thread*)
           24 
           25 (defun threadp (object)
           26   (typep object 'sb-thread:thread))
           27 
           28 (defun thread-name (thread)
           29   (sb-thread:thread-name thread))
           30 
           31 ;;; Resource contention: locks and recursive locks
           32 
           33 (deftype lock () 'sb-thread:mutex)
           34 
           35 (deftype recursive-lock () 'sb-thread:mutex)
           36 
           37 (defun lock-p (object)
           38   (typep object 'sb-thread:mutex))
           39 
           40 (defun recursive-lock-p (object)
           41   (typep object 'sb-thread:mutex))
           42 
           43 (defun make-lock (&optional name)
           44   (sb-thread:make-mutex :name (or name "Anonymous lock")))
           45 
           46 (defun acquire-lock (lock &optional (wait-p t))
           47   #+#.(cl:if (cl:find-symbol (cl:string '#:grab-mutex) :sb-thread) '(and) '(or))
           48   (sb-thread:grab-mutex lock :waitp wait-p)
           49   #-#.(cl:if (cl:find-symbol (cl:string '#:grab-mutex) :sb-thread) '(and) '(or))
           50   (sb-thread:get-mutex lock nil wait-p))
           51 
           52 (defun release-lock (lock)
           53   (sb-thread:release-mutex lock))
           54 
           55 (defmacro with-lock-held ((place) &body body)
           56   `(sb-thread:with-mutex (,place) ,@body))
           57 
           58 (defun make-recursive-lock (&optional name)
           59   (sb-thread:make-mutex :name (or name "Anonymous recursive lock")))
           60 
           61 ;;; XXX acquire-recursive-lock and release-recursive-lock are actually
           62 ;;; complicated because we can't use control stack tricks.  We need to
           63 ;;; actually count something to check that the acquire/releases are
           64 ;;; balanced
           65 
           66 (defmacro with-recursive-lock-held ((place) &body body)
           67   `(sb-thread:with-recursive-lock (,place)
           68      ,@body))
           69 
           70 ;;; Resource contention: condition variables
           71 
           72 (defun make-condition-variable (&key name)
           73   (sb-thread:make-waitqueue :name (or name "Anonymous condition variable")))
           74 
           75 (defun condition-wait (condition-variable lock &key timeout)
           76   (sb-thread:condition-wait condition-variable lock :timeout timeout))
           77 
           78 (defun condition-notify (condition-variable)
           79   (sb-thread:condition-notify condition-variable))
           80 
           81 (defun thread-yield ()
           82   (sb-thread:release-foreground))
           83 
           84 ;;; Timeouts
           85 
           86 (deftype timeout ()
           87   'sb-ext:timeout)
           88 
           89 (defmacro with-timeout ((timeout) &body body)
           90   `(sb-ext:with-timeout ,timeout
           91      ,@body))
           92 
           93 ;;; Semaphores
           94 
           95 (deftype semaphore ()
           96   'sb-thread:semaphore)
           97 
           98 (defun make-semaphore (&key name (count 0))
           99   (sb-thread:make-semaphore :name name :count count))
          100 
          101 (defun signal-semaphore (semaphore &key (count 1))
          102   (sb-thread:signal-semaphore semaphore count))
          103 
          104 (defun wait-on-semaphore (semaphore &key timeout)
          105   (sb-thread:wait-on-semaphore semaphore :timeout timeout))
          106 
          107 ;;; Introspection/debugging
          108 
          109 (defun all-threads ()
          110   (sb-thread:list-all-threads))
          111 
          112 (defun interrupt-thread (thread function &rest args)
          113   (flet ((apply-function ()
          114            (if args
          115                (lambda () (apply function args))
          116                function)))
          117     (declare (dynamic-extent #'apply-function))
          118     (sb-thread:interrupt-thread thread (apply-function))))
          119 
          120 (defun destroy-thread (thread)
          121   (signal-error-if-current-thread thread)
          122   (sb-thread:terminate-thread thread))
          123 
          124 (defun thread-alive-p (thread)
          125   (sb-thread:thread-alive-p thread))
          126 
          127 (defun join-thread (thread)
          128   (sb-thread:join-thread thread))
          129 
          130 (mark-supported)