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revision 1.32 by wlott, Sun Mar 8 18:30:32 1992 UTC revision 1.33 by wlott, Sun Apr 12 00:24:12 1992 UTC
# Line 19  Line 19 
19  (in-package "LISP" :use '("SYSTEM" "DEBUG"))  (in-package "LISP" :use '("SYSTEM" "DEBUG"))
21  (export '(most-positive-fixnum most-negative-fixnum sleep  (export '(most-positive-fixnum most-negative-fixnum sleep
22                                 ++ +++ ** *** // ///))            ++ +++ ** *** // ///))
24  (in-package "SYSTEM" :nicknames '("SYS"))  (in-package "SYSTEM" :nicknames '("SYS"))
25  (export '(without-gcing  (export '(compiler-version scrub-control-stack))
           *in-the-compiler* compiler-version *pornography-of-death*  
           *port-receive-rights-handlers* *port-ownership-rights-handlers*  
           without-interrupts with-reply-port map-port add-port-object  
           remove-port-object make-object-set object-set-operation  
           server-message *xwindow-table* map-xwindow add-xwindow-object  
           remove-xwindow-object server-event coerce-to-key-event  
           coerce-to-motion-event coerce-to-expose-event  
           coerece-to-exposecopy-event coerce-to-focuschange-event server  
           *task-self* *task-data* *task-notify* with-interrupts  
           with-enabled-interrupts enable-interrupt ignore-interrupt  
           default-interrupt scrub-control-stack))  
27  (in-package "EXTENSIONS")  (in-package "EXTENSIONS")
28  (export '(quit *prompt* save-lisp gc-on gc-off *clx-server-displays*))  (export '(quit *prompt*))
30  (in-package "LISP")  (in-package "LISP")
# Line 54  Line 42 
43  (defvar *lisp-implementation-version* "4.0(?)")  (defvar *lisp-implementation-version* "4.0(?)")
 (defvar *in-the-compiler* nil  
   "Bound to T while running code inside the compiler.  Macros may test this to  
   see where they are being expanded.")  
46  ;;; Must be initialized in %INITIAL-FUNCTION before the DEFVAR runs...  ;;; Must be initialized in %INITIAL-FUNCTION before the DEFVAR runs...
47  (proclaim '(special *gc-inhibit* *already-maybe-gcing*  (proclaim '(special *gc-inhibit* *already-maybe-gcing*
# Line 79  Line 63 
 ;;;; Global ports:  
 (defvar *task-self* nil  
   "Port that refers to the current task.")  
 (defvar *task-data* nil  
   "Port used to receive data for the current task.")  
 ;;;; Reply port allocation.  
 ;;;    We maintain a global stack of reply ports which is shared among  
 ;;; all matchmaker interfaces, and could be used by other people as well.  
 #| More stuff that will probably be drastically different.  
 ;;;    The stack is represented by a vector, and a pointer to the first  
 ;;; free port.  The stack grows upward.  There is always at least one  
 ;;; NIL entry in the stack after the last allocated port.  
 (defvar *reply-port-stack* (make-array 16)) ; Vector of reply ports.  
 (defvar *reply-port-pointer* 0) ; Index of first free port.  
 (defvar *reply-port-depth* 0)   ; Dynamic depth in With-Reply-Port forms.  
 ;;; We use this as the reply port when allocating or deallocating reply  
 ;;; ports to get around potentially nasty interactions.  Interrupts  
 ;;; are always off when we are doing this, so we don't have to have  
 ;;; more than one of these, or worry about unwinding.  
 (defvar *allocate-reply-port* (mach:mach-task_data))  
 ;;; Reset-Reply-Port-Stack  --  Internal  
 ;;;    This is a before-save initialization which Nil's out the reply  
 ;;; port stack and sets *allocate-reply-port* back to DataPort so that  
 ;;; things initialize right at OS-Init time.  
 (defun reset-reply-port-stack ()  
   (setf *reply-port-pointer* 0  *reply-port-depth* 0)  
   (fill (the simple-vector *reply-port-stack*) nil)  
   (setf *allocate-reply-port* (mach:mach-task_data)))  
 (pushnew 'reset-reply-port-stack *before-save-initializations*)  
 ;;; Allocate-New-Reply-Ports  --  Internal  
 ;;;    If we run out of reply ports, we allocate another one, possibly  
 ;;; growing the stack.  
 (defun allocate-new-reply-ports ()  
   (let* ((stack *reply-port-stack*)  
          (pointer *reply-port-pointer*)  
          (len (length stack)))  
     (declare (simple-vector stack) (fixnum len))  
     (when (eql pointer (1- len))  
       (let ((new (make-array (* len 2))))  
         (replace new stack :end1 len :end2 len)  
         (setf stack new  *reply-port-stack* new)))  
     (setf (svref stack pointer) *allocate-reply-port*)  
     (let ((port (gr-call* mach:port_allocate (mach:mach-task_self))))  
       (gr-call mach:port_disable (mach:mach-task_self) port)  
       ;; Nil out the allocate reply port so it isn't used for mundane purposes.  
       (setf (svref stack pointer) nil)  
       (setf (svref stack (1- pointer)) port)  
 ;;; Reallocate-Reply-Ports  --  Internal  
 ;;;    This function is called when With-Reply-Port finds the stack pointer  
 ;;; to be other than what it expected when it finishes.  Reallocates all  
 ;;; of the ports on the stack from Start to *reply-port-pointer*.  We  
 ;;; stick the *allocate-reply-port* out at *reply-port-pointer*, and  
 ;;; bind *reply-port-depth*, so that the allocation functions are happy.  
 (defun reallocate-reply-ports (start)  
   (let* ((pointer *reply-port-pointer*)  
          (*reply-port-depth* pointer)  
          (stack *reply-port-stack*)  
          (save-port (svref stack pointer)))  
     (when (> start pointer)  
       (error "More ports in use than allocated???"))  
     (setf (svref stack pointer) *allocate-reply-port*)  
     (do ((i start (1+ i)))  
         ((= i pointer)  
          (setf (svref stack pointer) save-port))  
       (let ((port (svref stack i)))  
         (gr-call mach:port_deallocate *task-self* port)  
         (setf (svref stack i)  
               (gr-call* mach:port_allocate *task-self*))))))  
 ;;;; Server stuff:  
 ;;;    There is a fair amount of stuff to support Matchmaker RPC servers  
 ;;; and asynchonous message service.  RPC message service needs to be  
 ;;; centralized since a server must receive on all ports, and there is  
 ;;; no way for a particular server to know about all other servers  
 ;;; in the same lisp.  
 ;;;    The idea is that you receive the message, and then dispatch off  
 ;;; of the port received on and the message ID received.  Ports correspond  
 ;;; to objects that the server manages.  Message ID's correspond to the  
 ;;; operations on the objects.  Objects are grouped into object sets, which  
 ;;; are sets of objects having the same operations defined.  
 ;;;    The same mechanism is used for handling asynchronous messages.  
 ;;;    The current implementation uses standard eq[l] hashtables for both  
 ;;; levels of dispatching.  Special purpose data structures would be more  
 ;;; efficient, but the ~1ms overhead will probably be lost in the noise.  
 ;;;    Hashtable from ports to objects.  Each entry is a cons (object . set).  
 (defvar *port-table* (make-hash-table :test #'eql))  
 ;;; Hashtable from windows to objects.  Each entry is a cons (object . set).  
 (defvar *xwindow-table* (make-hash-table :test #'eql))  
 (defstruct (object-set  
             (:constructor make-object-set  
                           (name &optional  
                                 (default-handler #'default-default-handler)))  
              (lambda (s stream d)  
                (declare (ignore d))  
                (format stream "#<Object Set ~S>" (object-set-name s)))))  
   name                                  ; Name, for descriptive purposes.  
   (table (make-hash-table :test #'eq))  ; Message-ID or xevent-type --> handler fun.  
 (setf (documentation 'make-object-set 'function)  
       "Make an object set for use by a RPC/xevent server.  Name is for  
       descriptive purposes only.")  
 ;;; Default-Default-Handler  --  Internal  
 ;;;    If no such operation defined, signal an error.  
 (defun default-default-handler (object)  
   (alien-bind ((msg (server-message-msg server-message)))  
     (error "No operation for ID ~D on ~S in ~S."  
            (alien-access (mach:msg-id (alien-value msg))) object  
            (car (gethash (alien-access (mach:msg-localport (alien-value msg)))  
   (error "You lose, object: ~S" object))  
 ;;; MAP-XWINDOW and MAP-PORT return as multiple values the object and  
 ;;; object set mapped to by a xwindow or port in *xwindow-table* or  
 ;;; *port-table*.  
 (macrolet ((defmapper (name table)  
               `(defun ,(intern (concatenate 'simple-string  
                                             "MAP-" (symbol-name name)))  
                  ,(format nil "Return as multiple values the object and ~  
                                object-set mapped to by ~A."  
                           (string-downcase (symbol-name name)))  
                  (let ((temp (gethash ,name ,table)))  
                    (if temp  
                        (values (car temp) (cdr temp))  
                        (values nil nil))))))  
   (defmapper port *port-table*)  
   (defmapper xwindow *xwindow-table*))  
 ;;; ADD-PORT-OBJECT and ADD-XWINDOW-OBJECT store an object/object-set pair  
 ;;; mapped to by a port or xwindow in either *port-table* or *xwindow-table*.  
 (macrolet ((def-add-object (name table)  
               `(defun ,(intern (concatenate 'simple-string  
                                             "ADD-" (symbol-name name)  
                       (,name object object-set)  
                  ,(format nil "Add a new ~A/object/object-set association."  
                           (string-downcase (symbol-name name)))  
                  (check-type object-set object-set)  
                  (setf (gethash ,name ,table) (cons object object-set))  
   (def-add-object port *port-table*)  
   (def-add-object xwindow *xwindow-table*))  
 ;;; REMOVE-PORT-OBJECT and REMOVE-XWINDOW-OBJECT remove a port or xwindow and  
 ;;; its associated object/object-set pair from *port-table* or *xwindow-table*.  
 (macrolet ((def-remove-object (name table)  
               `(defun ,(intern (concatenate 'simple-string  
                                             "REMOVE-" (symbol-name name)  
                  ,(format nil  
                           "Remove ~A and its associated object/object-set pair."  
                           (string-downcase (symbol-name name)))  
                  (remhash ,name ,table))))  
   (def-remove-object port *port-table*)  
   (def-remove-object xwindow *xwindow-table*))  
 ;;; Object-Set-Operation  --  Public  
 ;;;    Look up the handler function for a given message ID.  
 (defun object-set-operation (object-set message-id)  
   "Return the handler function in Object-Set for the operation specified by  
   Message-ID, if none, NIL is returned.  The handler function is passed  
   the object.  The received message is in server-Message."  
   (check-type object-set object-set)  
   (check-type message-id fixnum)  
   (values (gethash message-id (object-set-table object-set))))  
 ;;; %Set-Object-Set-Operation  --  Internal  
 ;;;    The setf inverse for Object-Set-Operation.  
 (defun %set-object-set-operation (object-set message-id new-value)  
   (check-type object-set object-set)  
   (check-type message-id fixnum)  
   (setf (gethash message-id (object-set-table object-set)) new-value))  
 (defsetf object-set-operation %set-object-set-operation  
   "Sets the handler function for an object set operation.")  
 ;;;; Emergency Message Handling:  
 ;;; We use the same mechanism for asynchronous messages as is used for  
 ;;; normal server messages.   The only tricky part is that we don't want  
 ;;; some random server function being called when we really want to  
 ;;; receive an emergency message, so we can't receive on all ports.  
 ;;; Instead, we use MessagesWaiting to find the ports with emergency  
 ;;; messages.  
 #| still more noise that will be different.  
 (defalien waiting-ports nil (long-words 128))  
 ;;; Service-Emergency-Message-Interrupt  --  Internal  
 ;;;    This is a lot like the server function, but we only receive on  
 ;;; ports with one emergency message.  We only receive one message because  
 ;;; the handler function might have caused any other messages to be received.  
 ;;; When we re-enable interrupts, if any emergency messages are left, we  
 ;;; should be interrupted again.  
 (defun service-emergency-message-interrupt ()  
 ;;; This object set is used for DataPort, which is the port various magical  
 ;;; message from the kernel are received on...  
 (defvar *kernel-messages* (make-object-set "Kernel Messages"))  
 (compiler-let ((*alien-eval-when* '(compile eval)))  
 (defrecord port-death-msg  
   (msg mach:msg #.(record-size 'mach:msg))  
   (ex-port-tt pad (long-words 1))  
   (ex-port (signed-byte 32) (long-words 1)))  
 (defoperator (server-message-port-death-msg port-death-msg)  
              ((msg server-message))  
   `(alien-index (alien-value ,msg) 0 (record-size 'port-death-msg)))  
 ); Compiler-Let  
 ;;; *Port-Death-Handlers* is an EQ hash table of lists of functions that are  
 ;;; called upon port death.  If a port dies that is not in the table, we print  
 ;;; out a message on *Trace-Output* describing its death.  If  
 ;;; *Pornography-Of-Death* is true, we don't even print that message.  
 (defvar *port-death-handlers* (make-hash-table :test #'eql)  
   "Don't use this --- use Add-Port-Death-Handler instead.")  
 ;;; Add-Port-Death-Handler, Remove-Port-Death-Handler  --  Public  
 (defun add-port-death-handler (port function)  
   "Make Function a handler for port death on Port.  When the port dies,  
   Function is called with the port and an argument.  See also  
   (pushnew function (gethash port *port-death-handlers*))  
 (defun remove-port-death-handler (port function)  
   "Undoes the effect of Add-Port-Death-Handler."  
   (setf (gethash port *port-death-handlers*)  
         (delete function (gethash port *port-death-handlers*)))  
 (setf (object-set-operation *kernel-messages* mach:notify-port-deleted)  
       #'(lambda (obj)  
           (declare (ignore obj))  
           (let* ((ex-port (alien-access  
                             (server-message-port-death-msg server-message))))  
                  (handlers (gethash ex-port *port-death-handlers*)))  
             (remhash ex-port *port-table*)  
             (remhash ex-port *port-death-handlers*)  
             (if (null handlers)  
                 (handle-unclaimed-port-death ex-port)  
                 (dolist (fun handlers) (funcall fun ex-port))))  
 (defvar *pornography-of-death* t  
   "If true, nothing is said about port deaths.")  
 (defun handle-unclaimed-port-death (port)  
   (unless *pornography-of-death*  
     (format *trace-output* "~&[Port ~S just bit the dust.]~%" port)))  
 ;;; Port receive and ownership rights messages are handled simlarly, but  
 ;;; by default we deallocate the port to make sure it's really dead.  This  
 ;;; gets around problems with ports being exhausted because some servers  
 ;;; don't really nuke the port when the deallocate the object.  
 (defvar *port-receive-rights-handlers* (make-hash-table :test #'eql)  
   "This is a hashtable from ports to functions.  The function is called with  
   the port as its argument when a port receive rights message for that port  
   is received from the kernel.")  
 (defvar *port-ownership-rights-handlers* (make-hash-table :test #'eql)  
   "This is a hashtable from ports to functions.  The function is called with  
   the port as its argument when a port ownership rights message for that port  
   is received from the kernel.")  
 (setf (object-set-operation *kernel-messages* mach:notify-receive-rights)  
       #'(lambda (obj)  
           (declare (ignore obj))  
           (let ((ex-port (alien-access  
                            (server-message-port-death-msg server-message)))))  
             (funcall (gethash ex-port *port-receive-rights-handlers*  
 (setf (object-set-operation *kernel-messages* mach:notify-ownership-rights)  
       #'(lambda (obj)  
           (declare (ignore obj))  
           (let ((ex-port (alien-access  
                            (server-message-port-death-msg server-message)))))  
             (funcall (gethash ex-port *port-ownership-rights-handlers*  
 (defun handle-unclaimed-port-rights (port)  
   (unless *pornography-of-death*  
     (format *trace-output* "~&[Rights received for port ~D, deallocating it.]~%"  
   (mach:port_deallocate *task-self* port)  
   (remhash port *port-receive-rights-handlers*)  
   (remhash port *port-ownership-rights-handlers*)  
   (remhash port *port-table*))  
 (add-port-object *task-data* nil *kernel-messages*)  
 ;;; Clear-Port-Tables  --  Internal  
 ;;;    A before-save initialization which clears all of the port hashtables.  
 (defun clear-port-tables ()  
   (clrhash *port-table*)  
   (clrhash *port-death-handlers*)  
   (clrhash *port-receive-rights-handlers*)  
   (clrhash *port-ownership-rights-handlers*))  
 (pushnew 'clear-port-tables *before-save-initializations*)  
66  ;;; %Initial-Function is called when a cold system starts up.  First we zoom  ;;; %Initial-Function is called when a cold system starts up.  First we zoom
67  ;;; down the *Lisp-Initialization-Functions* doing things that wanted to happen  ;;; down the *Lisp-Initialization-Functions* doing things that wanted to happen
68  ;;; at "load time."  Then we initialize the various subsystems and call the  ;;; at "load time."  Then we initialize the various subsystems and call the
# Line 570  Line 172 
173  ;;;; Initialization functions:  ;;;; Initialization functions:
 ;;; Reinit is called to reinitialize the world when a saved core image  
 ;;; is resumed.  
 (defvar *task-notify* NIL)  
175  (defun reinit ()  (defun reinit ()
176    (without-interrupts    (without-interrupts
177     (setf *already-maybe-gcing* t)     (without-gcing
178     (os-init)      (os-init)
179     (stream-reinit)      (stream-reinit)
180     (kernel::signal-init)      (kernel::signal-init)
181     (setf (alien:extern-alien "internal_errors_enabled" alien:boolean) t)      (gc-init)
182     (setf *already-maybe-gcing* nil))      (setf (alien:extern-alien "internal_errors_enabled" alien:boolean) t)
183    (set-floating-point-modes :traps '(:overflow :underflow :invalid      (set-floating-point-modes :traps
184                                                 :divide-by-zero))                                '(:overflow :underflow :invalid
185    #+nil                                            :divide-by-zero)))))
   (mach:port_enable (mach:mach-task_self) *task-notify*)  
   (add-port-object *task-notify* nil *kernel-messages*))  

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