#!+(and sb-lutex sb-thread)
(lutex (make-lutex)))
-;;; FIXME: We probably want to rename the accessor MUTEX-OWNER.
(defun mutex-value (mutex)
- "Current owner of the mutex, NIL if the mutex is free."
+ "Current owner of the mutex, NIL if the mutex is free. May return a
+stale value, use MUTEX-OWNER instead."
(mutex-%owner mutex))
+(defun holding-mutex-p (mutex)
+ "Test whether the current thread is holding MUTEX."
+ ;; This is about the only use for which a stale value of owner is
+ ;; sufficient.
+ (eq sb!thread:*current-thread* (mutex-%owner mutex)))
+
(defsetf mutex-value set-mutex-value)
(declaim (inline set-mutex-value))
,value
,wait-p)))
-(sb!xc:defmacro with-system-mutex ((mutex &key without-gcing) &body body)
+(sb!xc:defmacro with-system-mutex ((mutex
+ &key without-gcing allow-with-interrupts)
+ &body body)
`(dx-flet ((with-system-mutex-thunk () ,@body))
- (call-with-system-mutex
- #'with-system-mutex-thunk
- ,mutex
- ,without-gcing)))
+ (,(cond (without-gcing
+ 'call-with-system-mutex/without-gcing)
+ (allow-with-interrupts
+ 'call-with-system-mutex/allow-with-interrupts)
+ (t
+ 'call-with-system-mutex))
+ #'with-system-mutex-thunk
+ ,mutex)))
+
+(sb!xc:defmacro with-system-spinlock ((spinlock &key) &body body)
+ `(dx-flet ((with-system-spinlock-thunk () ,@body))
+ (call-with-system-spinlock
+ #'with-system-spinlock-thunk
+ ,spinlock)))
(sb!xc:defmacro with-recursive-lock ((mutex) &body body)
#!+sb-doc
#'with-recursive-spinlock-thunk
,spinlock)))
-(sb!xc:defmacro with-recursive-system-spinlock ((spinlock &key without-gcing)
+(sb!xc:defmacro with-recursive-system-spinlock ((spinlock
+ &key without-gcing)
&body body)
`(dx-flet ((with-recursive-system-spinlock-thunk () ,@body))
- (call-with-recursive-system-spinlock
- #'with-recursive-system-spinlock-thunk
- ,spinlock
- ,without-gcing)))
+ (,(cond (without-gcing
+ 'call-with-recursive-system-spinlock/without-gcing)
+ (t
+ 'call-with-recursive-system-spinlock))
+ #'with-recursive-system-spinlock-thunk
+ ,spinlock)))
(sb!xc:defmacro with-spinlock ((spinlock) &body body)
`(dx-flet ((with-spinlock-thunk () ,@body))
#'with-spinlock-thunk
,spinlock)))
-;;; KLUDGE: this separate implementation for (NOT SB-THREAD) is not
-;;; strictly necessary; GET-MUTEX and RELEASE-MUTEX are implemented.
-;;; However, there would be a (possibly slight) performance hit in
-;;; using them.
+(macrolet ((def (name &optional variant)
+ `(defun ,(if variant (symbolicate name "/" variant) name)
+ (function mutex)
+ (declare (function function))
+ (flet ((%call-with-system-mutex ()
+ (dx-let (got-it)
+ (unwind-protect
+ (when (setf got-it (get-mutex mutex))
+ (funcall function))
+ (when got-it
+ (release-mutex mutex))))))
+ (declare (inline %call-with-system-mutex))
+ ,(ecase variant
+ (:without-gcing
+ `(without-gcing (%call-with-system-mutex)))
+ (:allow-with-interrupts
+ `(without-interrupts
+ (allow-with-interrupts (%call-with-system-mutex))))
+ ((nil)
+ `(without-interrupts (%call-with-system-mutex))))))))
+ (def call-with-system-mutex)
+ (def call-with-system-mutex :without-gcing)
+ (def call-with-system-mutex :allow-with-interrupts))
+
#!-sb-thread
(progn
- (defun call-with-system-mutex (function mutex &optional without-gcing-p)
- (declare (ignore mutex)
- (function function))
- (if without-gcing-p
- (without-gcing
- (funcall function))
- (without-interrupts
- (allow-with-interrupts (funcall function)))))
-
- (defun call-with-system-spinlock (function spinlock &optional without-gcing-p)
- (declare (ignore spinlock)
- (function function))
- (if without-gcing-p
- (without-gcing
- (funcall function))
- (without-interrupts
- (allow-with-interrupts (funcall function)))))
-
- (defun call-with-recursive-system-spinlock (function lock
- &optional without-gcing-p)
- (declare (ignore lock)
- (function function))
- (if without-gcing-p
- (without-gcing
- (funcall function))
- (without-interrupts
- (allow-with-interrupts (funcall function)))))
+ (macrolet ((def (name &optional variant)
+ `(defun ,(if variant (symbolicate name "/" variant) name)
+ (function lock)
+ (declare (ignore lock) (function function))
+ ,(ecase variant
+ (:without-gcing
+ `(without-gcing (funcall function)))
+ (:allow-with-interrupts
+ `(without-interrupts
+ (allow-with-interrupts (funcall function))))
+ ((nil)
+ `(without-interrupts (funcall function)))))))
+ (def call-with-system-spinlock)
+ (def call-with-recursive-system-spinlock)
+ (def call-with-recursive-system-spinlock :without-gcing))
(defun call-with-mutex (function mutex value waitp)
(declare (ignore mutex value waitp)
#!+sb-thread
;;; KLUDGE: These need to use DX-LET, because the cleanup form that
-;;; closes over GOT-IT causes a value-cell to be allocated for it -- and
-;;; we prefer that to go on the stack since it can.
+;;; closes over GOT-IT causes a value-cell to be allocated for it --
+;;; and we prefer that to go on the stack since it can.
(progn
- (defun call-with-system-mutex (function mutex &optional without-gcing-p)
- (declare (function function))
- (flet ((%call-with-system-mutex ()
- (dx-let (got-it)
- (unwind-protect
- (when (setf got-it (get-mutex mutex))
- (funcall function))
- (when got-it
- (release-mutex mutex))))))
- (if without-gcing-p
- (without-gcing
- (%call-with-system-mutex))
- (without-interrupts
- (allow-with-interrupts (%call-with-system-mutex))))))
-
- (defun call-with-system-spinlock (function spinlock &optional without-gcing-p)
+ (defun call-with-system-spinlock (function spinlock)
(declare (function function))
- (flet ((%call-with-system-spinlock ()
- (dx-let (got-it)
- (unwind-protect
- (when (setf got-it (get-spinlock spinlock))
- (funcall function))
- (when got-it
- (release-spinlock spinlock))))))
- (if without-gcing-p
- (without-gcing
- (%call-with-system-spinlock))
- (without-interrupts
- (allow-with-interrupts (%call-with-system-spinlock))))))
-
- (defun call-with-recursive-system-spinlock (function lock
- &optional without-gcing-p)
- (declare (function function))
- (flet ((%call-with-system-spinlock ()
- (dx-let ((inner-lock-p (eq *current-thread* (spinlock-value lock)))
- (got-it nil))
- (unwind-protect
- (when (or inner-lock-p (setf got-it (get-spinlock lock)))
- (funcall function))
- (when got-it
- (release-spinlock lock))))))
- (if without-gcing-p
- (without-gcing
- (%call-with-system-spinlock))
- (without-interrupts
- (allow-with-interrupts (%call-with-system-spinlock))))))
+ (without-interrupts
+ (dx-let (got-it)
+ (unwind-protect
+ (when (setf got-it (get-spinlock spinlock))
+ (funcall function))
+ (when got-it
+ (release-spinlock spinlock))))))
+
+ (macrolet ((def (name &optional variant)
+ `(defun ,(if variant (symbolicate name "/" variant) name)
+ (function spinlock)
+ (declare (function function))
+ (flet ((%call-with-system-spinlock ()
+ (dx-let ((inner-lock-p
+ (eq *current-thread*
+ (spinlock-value spinlock)))
+ (got-it nil))
+ (unwind-protect
+ (when (or inner-lock-p
+ (setf got-it
+ (get-spinlock spinlock)))
+ (funcall function))
+ (when got-it
+ (release-spinlock spinlock))))))
+ (declare (inline %call-with-system-spinlock))
+ ,(ecase variant
+ (:without-gcing
+ `(without-gcing (%call-with-system-spinlock)))
+ ((nil)
+ `(without-interrupts (%call-with-system-spinlock))))))))
+ (def call-with-recursive-system-spinlock)
+ (def call-with-recursive-system-spinlock :without-gcing))
(defun call-with-spinlock (function spinlock)
(declare (function function))
(when got-it
(release-mutex mutex))))))
-
-
(defun call-with-recursive-spinlock (function spinlock)
(declare (function function))
(dx-let ((inner-lock-p (eq (spinlock-value spinlock) *current-thread*))
projects / sbcl.git / blobdiff