131 lines
3 KiB
Common Lisp
131 lines
3 KiB
Common Lisp
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;;;; -*- indent-tabs-mode: nil -*-
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Copyright 2006, 2007 Greg Pfeil
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Distributed under the MIT license (see LICENSE file)
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|#
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(in-package #:bordeaux-threads)
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;;; documentation on the OpenMCL Threads interface can be found at
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;;; http://openmcl.clozure.com/Doc/Programming-with-Threads.html
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(deftype thread ()
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'ccl:process)
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;;; Thread Creation
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(defun %make-thread (function name)
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(ccl:process-run-function name function))
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(defun current-thread ()
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ccl:*current-process*)
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(defun threadp (object)
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(typep object 'ccl:process))
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(defun thread-name (thread)
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(ccl:process-name thread))
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;;; Resource contention: locks and recursive locks
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(deftype lock () 'ccl:lock)
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(deftype recursive-lock () 'ccl:lock)
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(defun lock-p (object)
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(typep object 'ccl:lock))
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(defun recursive-lock-p (object)
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(typep object 'ccl:lock))
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(defun make-lock (&optional name)
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(ccl:make-lock (or name "Anonymous lock")))
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(defun acquire-lock (lock &optional (wait-p t))
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(if wait-p
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(ccl:grab-lock lock)
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(ccl:try-lock lock)))
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(defun release-lock (lock)
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(ccl:release-lock lock))
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(defmacro with-lock-held ((place) &body body)
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`(ccl:with-lock-grabbed (,place)
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,@body))
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(defun make-recursive-lock (&optional name)
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(ccl:make-lock (or name "Anonymous recursive lock")))
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(defun acquire-recursive-lock (lock)
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(ccl:grab-lock lock))
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(defun release-recursive-lock (lock)
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(ccl:release-lock lock))
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(defmacro with-recursive-lock-held ((place) &body body)
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`(ccl:with-lock-grabbed (,place)
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,@body))
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;;; Resource contention: condition variables
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(defun make-condition-variable (&key name)
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(declare (ignore name))
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(ccl:make-semaphore))
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(defun condition-wait (condition-variable lock &key timeout)
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(release-lock lock)
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(unwind-protect
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(if timeout
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(ccl:timed-wait-on-semaphore condition-variable timeout)
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(ccl:wait-on-semaphore condition-variable))
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(acquire-lock lock t))
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t)
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(defun condition-notify (condition-variable)
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(ccl:signal-semaphore condition-variable))
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(defun thread-yield ()
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(ccl:process-allow-schedule))
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;;; Semaphores
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(deftype semaphore ()
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'ccl:semaphore)
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(defun make-semaphore (&key name (count 0))
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(declare (ignore name))
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(let ((semaphore (ccl:make-semaphore)))
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(dotimes (c count) (ccl:signal-semaphore semaphore))
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semaphore))
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(defun signal-semaphore (semaphore &key (count 1))
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(dotimes (c count) (ccl:signal-semaphore semaphore)))
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(defun wait-on-semaphore (semaphore &key timeout)
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(if timeout
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(ccl:timed-wait-on-semaphore semaphore timeout)
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(ccl:wait-on-semaphore semaphore)))
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;;; Introspection/debugging
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(defun all-threads ()
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(ccl:all-processes))
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(defun interrupt-thread (thread function &rest args)
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(declare (dynamic-extent args))
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(apply #'ccl:process-interrupt thread function args))
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(defun destroy-thread (thread)
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(signal-error-if-current-thread thread)
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(ccl:process-kill thread))
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(defun thread-alive-p (thread)
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(not (ccl:process-exhausted-p thread)))
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(defun join-thread (thread)
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(ccl:join-process thread))
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(mark-supported)
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