+;;;; unithread stub support for threads in the target machine
+
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
+
(in-package "SB!THREAD")
;;; used bu debug-int.lisp to access interrupt contexts
(sb!sys:sap-ref-32 (alien-sap (extern-alien "all_threads" (* t)))
(* sb!vm::thread-pid-slot 4)))
+(defun reap-dead-threads ())
+
;;;; queues, locks
;; spinlocks use 0 as "free" value: higher-level locks use NIL
(return t))
(setf old-value t1))))
-(defmacro with-mutex ((mutex &key value (wait-p t)) &body body)
- (cond ((not wait-p)
- `(unless (mutex-value ,mutex)
- (unwind-protect
- (progn
- (setf (mutex-value ,mutex) (or ,value t))
- ,@body)
- (setf (mutex-value ,mutex) nil))))
- (t
- `(progn ,@body))))
+(defun get-mutex (lock &optional new-value (wait-p t))
+ (declare (type mutex lock))
+ (let ((old-value (mutex-value lock)))
+ (when (and old-value wait-p)
+ (error "In unithread mode, mutex ~S was requested with WAIT-P ~S and ~
+ new-value ~S, but has already been acquired (with value ~S)."
+ lock wait-p new-value old-value))
+ (setf (mutex-value lock) new-value)
+ t))
+
+(defun release-mutex (lock)
+ (declare (type mutex lock))
+ (setf (mutex-value lock) nil))
;;; what's the best thing to do with these on unithread? commented
;;; functions are the thread versions, just to remind me what they do