0.8.10.23:

[sbcl.git] / src / code / target-unithread.lisp

diff --git a/src/code/target-unithread.lisp b/src/code/target-unithread.lisp
index c79c011..0eddbbb 100644 (file)
--- a/src/code/target-unithread.lisp
+++ b/src/code/target-unithread.lisp
@@ -1,15 +1,35 @@
+;;;; 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-fluid (declaim (inline sb!vm::current-thread-offset-sap))
+(defun sb!vm::current-thread-offset-sap (n) 
+  (declare (type (unsigned-byte 27) n))
+  (sb!sys:sap-ref-sap (alien-sap (extern-alien "all_threads" (* t))) 
+              (* n 4)))
+
 (defun current-thread-id ()
-  (sb!sys:sap-int
-   (sb!vm::current-thread-offset-sap sb!vm::thread-pid-slot)))
+  (sb!sys:sap-ref-32 (alien-sap (extern-alien "all_threads" (* t))) 
+              (* sb!vm::thread-pid-slot 4)))
 
 ;;;; 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
@@ -49,7 +69,7 @@
     (let ((h (car (waitqueue-data queue))))
       (setf (waitqueue-lock queue) 0)
       (when h
-       (sb!unix:unix-kill h :sigcont)))))
+       (sb!unix:unix-kill h sb!unix:sigcont)))))
 
 ;;;; mutex
 
@@ -83,12 +103,24 @@
        (return t))
      (setf old-value t1))))
 
-(defmacro with-mutex ((mutex &key value (wait-p t))  &body body)
-  (declare (ignore mutex value wait-p))
-  `(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?
-#+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
@@ -107,11 +139,16 @@ 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 ())