(in-package "SB!THREAD")
-(sb!xc:defmacro with-mutex ((mutex &key value (wait-p t)) &body body)
+(def!struct mutex
+ #!+sb-doc
+ "Mutex type."
+ (name nil :type (or null simple-string))
+ (value nil)
+ #!+(and sb-lutex sb-thread)
+ (lutex (make-lutex)))
+
+(def!struct spinlock
+ #!+sb-doc
+ "Spinlock type."
+ (name nil :type (or null simple-string))
+ (value nil))
+
+(sb!xc:defmacro with-mutex ((mutex &key (value '*current-thread*) (wait-p t))
+ &body body)
#!+sb-doc
"Acquire MUTEX for the dynamic scope of BODY, setting it to
NEW-VALUE or some suitable default value if NIL. If WAIT-P is non-NIL
and the mutex is in use, sleep until it is available"
- #!-sb-thread (declare (ignore mutex value wait-p))
- #!+sb-thread
- (with-unique-names (got)
- `(let ((,got (get-mutex ,mutex ,value ,wait-p)))
- (when ,got
- (unwind-protect
- (locally ,@body)
- (release-mutex ,mutex)))))
- ;; KLUDGE: this separate expansion 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.
- #!-sb-thread
- `(locally ,@body))
+ `(call-with-mutex
+ (lambda () ,@body)
+ ,mutex
+ ,value
+ ,wait-p))
(sb!xc:defmacro with-recursive-lock ((mutex) &body body)
#!+sb-doc
"Acquires MUTEX for the dynamic scope of BODY. Within that scope
-further recursive lock attempts for the same mutex succeed. However,
-it is an error to mix WITH-MUTEX and WITH-RECURSIVE-LOCK for the same
-mutex."
- #!-sb-thread (declare (ignore mutex))
- #!+sb-thread
- (with-unique-names (cfp inner-lock)
- `(let ((,cfp (sb!kernel:current-fp))
- (,inner-lock
- (and (mutex-value ,mutex)
- (sb!vm:control-stack-pointer-valid-p
- (sb!sys:int-sap
- (sb!kernel:get-lisp-obj-address (mutex-value ,mutex)))))))
- (unless ,inner-lock
- ;; this punning with MAKE-LISP-OBJ depends for its safety on
- ;; the frame pointer being a lispobj-aligned integer. While
- ;; it is, then MAKE-LISP-OBJ will always return a FIXNUM, so
- ;; we're safe to do that. Should this ever change, this
- ;; MAKE-LISP-OBJ could return something that looks like a
- ;; pointer, but pointing into neverneverland, which will
- ;; confuse GC completely. -- CSR, 2003-06-03
- (get-mutex ,mutex (sb!kernel:make-lisp-obj (sb!sys:sap-int ,cfp))))
- (unwind-protect
- (locally ,@body)
- (unless ,inner-lock
- (release-mutex ,mutex)))))
- #!-sb-thread
- `(locally ,@body))
+further recursive lock attempts for the same mutex succeed. It is
+allowed to mix WITH-MUTEX and WITH-RECURSIVE-LOCK for the same mutex
+provided the default value is used for the mutex."
+ `(call-with-recursive-lock
+ (lambda () ,@body)
+ ,mutex))
+
+(sb!xc:defmacro with-recursive-spinlock ((spinlock) &body body)
+ `(call-with-recursive-spinlock
+ (lambda () ,@body)
+ ,spinlock))
+
+(sb!xc:defmacro with-spinlock ((spinlock) &body body)
+ `(call-with-spinlock
+ (lambda () ,@body)
+ ,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.
+#!-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
+ (funcall function))))
+
+ (defun call-with-system-spinlock (function lock &optional without-gcing-p)
+ (declare (ignore lock)
+ (function function))
+ (if without-gcing-p
+ (without-gcing
+ (funcall function))
+ (without-interrupts
+ (funcall function))))
+
+ (defun call-with-mutex (function mutex value waitp)
+ (declare (ignore mutex value waitp)
+ (function function))
+ (funcall function))
+
+ (defun call-with-recursive-lock (function mutex)
+ (declare (ignore mutex) (function function))
+ (funcall function))
+
+ (defun call-with-spinlock (function spinlock)
+ (declare (ignore spinlock) (function function))
+ (funcall function))
+
+ (defun call-with-recursive-spinlock (function spinlock)
+ (declare (ignore spinlock) (function function))
+ (funcall function)))
+
+#!+sb-thread
+(progn
+ (defun call-with-system-mutex (function mutex &optional without-gcing-p)
+ (declare (function function))
+ (flet ((%call-with-system-mutex ()
+ (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
+ (%call-with-system-mutex)))))
+
+ (defun call-with-recursive-system-spinlock (function lock &optional without-gcing-p)
+ (declare (function function))
+ (flet ((%call-with-system-spinlock ()
+ (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
+ (%call-with-system-spinlock)))))
+
+ (defun call-with-mutex (function mutex value waitp)
+ (declare (function function))
+ (let ((got-it nil))
+ (without-interrupts
+ (unwind-protect
+ (when (setq got-it (allow-with-interrupts
+ (get-mutex mutex value waitp)))
+ (with-local-interrupts (funcall function)))
+ (when got-it
+ (release-mutex mutex))))))
+
+ (defun call-with-recursive-lock (function mutex)
+ (declare (function function))
+ (let ((inner-lock-p (eq (mutex-value mutex) *current-thread*))
+ (got-it nil))
+ (without-interrupts
+ (unwind-protect
+ (when (or inner-lock-p (setf got-it (allow-with-interrupts
+ (get-mutex mutex))))
+ (with-local-interrupts (funcall function)))
+ (when got-it
+ (release-mutex mutex))))))
+
+ (defun call-with-spinlock (function spinlock)
+ (declare (function function))
+ (let ((got-it nil))
+ (without-interrupts
+ (unwind-protect
+ (when (setf got-it (allow-with-interrupts
+ (get-spinlock spinlock)))
+ (with-local-interrupts (funcall function)))
+ (when got-it
+ (release-spinlock spinlock))))))
+
+ (defun call-with-recursive-spinlock (function spinlock)
+ (declare (function function))
+ (let ((inner-lock-p (eq (spinlock-value spinlock) *current-thread*))
+ (got-it nil))
+ (without-interrupts
+ (unwind-protect
+ (when (or inner-lock-p (setf got-it (allow-with-interrupts
+ (get-spinlock spinlock))))
+ (with-local-interrupts (funcall function)))
+ (when got-it
+ (release-spinlock spinlock)))))))
projects / sbcl.git / blobdiff