X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-unithread.lisp;h=4fc86d5f92580f8152845a2b6ffea2b6b3f79291;hb=15d6e7c9a2c3234f95dfe278046fa2fee1b0c007;hp=33f4b68ce21ae8efddbea1bec4b7abe1a5e99b51;hpb=5a2b6553fbbbb62fa789350facd0d56bb136045f;p=sbcl.git

diff --git a/src/code/target-unithread.lisp b/src/code/target-unithread.lisp
index 33f4b68..4fc86d5 100644
--- a/src/code/target-unithread.lisp
+++ b/src/code/target-unithread.lisp
@@ -1,3 +1,14 @@
+;;;; 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
@@ -11,12 +22,16 @@
   (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
-(defun get-spinlock (lock offset new-value) )
+(defun get-spinlock (lock offset new-value)
+  (declare (ignore lock offset new-value)))
 
 (defmacro with-spinlock ((queue) &body body)
+  (declare (ignore queue))
   `(progn ,@body))
 
 ;;;; the higher-level locking operations are based on waitqueues
@@ -90,19 +105,24 @@
        (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))))
-
-;;; what's the best thing to do with these on unithread?
-#+NIl
+(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
+;;; there
+#+nil
 (defun condition-wait (queue lock)
   "Atomically release LOCK and enqueue ourselves on QUEUE.  Another
 thread may subsequently notify us using CONDITION-NOTIFY, at which
@@ -121,11 +141,16 @@ time we reacquire LOCK and return to the caller."
   "Notify one of the processes waiting on QUEUE"
   (signal-queue-head queue))
 
-
-;;;; multiple independent listeners
-
-(defvar *session-lock* nil)
+(defun maybe-install-futex-functions () nil)
 
 ;;;; job control
 
-(defun debugger-wait-until-foreground-thread (stream) t)
+(defun init-job-control () t)
+(defun debugger-wait-until-foreground-thread (stream)
+  (declare (ignore stream))
+  t)
+(defun get-foreground () t)
+(defun release-foreground (&optional next)
+  (declare (ignore next))
+  t)
+(defun terminate-session ())