(slot usage 'ru-nivcsw))
who (addr usage))))
\f
-;;;; poll.h
-
(defvar *on-dangerous-wait* :warn)
;;; Calling select in a bad place can hang in a nasty manner, so it's better
type)
(sb!debug:backtrace)))
nil))
-
-(define-alien-type nil
- (struct pollfd
- (fd int)
- (events short) ; requested events
- (revents short))) ; returned events
-
-;; Just for a single fd.
-(defun unix-simple-poll (fd direction to-msec)
- (declare (fixnum fd to-msec))
- (when (and (minusp to-msec) (not *interrupts-enabled*))
- (note-dangerous-wait "poll(2)"))
- (let ((events (ecase direction
- (:input (logior pollin pollpri))
- (:output pollout))))
- (with-alien ((fds (struct pollfd)))
- (sb!unix:with-restarted-syscall (count errno)
- (progn
- (setf (slot fds 'fd) fd
- (slot fds 'events) events
- (slot fds 'revents) 0)
- (int-syscall ("poll" (* (struct pollfd)) int int)
- (addr fds) 1 to-msec))
- (if (zerop errno)
- (and (eql 1 count) (logtest events (slot fds 'revents)))
- (error "Syscall poll(2) failed: ~A" (strerror)))))))
+\f
+;;;; poll.h
+#!+os-provides-poll
+(progn
+ (define-alien-type nil
+ (struct pollfd
+ (fd int)
+ (events short) ; requested events
+ (revents short))) ; returned events
+
+ (defun unix-simple-poll (fd direction to-msec)
+ (declare (fixnum fd to-msec))
+ (when (and (minusp to-msec) (not *interrupts-enabled*))
+ (note-dangerous-wait "poll(2)"))
+ (let ((events (ecase direction
+ (:input (logior pollin pollpri))
+ (:output pollout))))
+ (with-alien ((fds (struct pollfd)))
+ (with-restarted-syscall (count errno)
+ (progn
+ (setf (slot fds 'fd) fd
+ (slot fds 'events) events
+ (slot fds 'revents) 0)
+ (int-syscall ("poll" (* (struct pollfd)) int int)
+ (addr fds) 1 to-msec))
+ (if (zerop errno)
+ (let ((revents (slot fds 'revents)))
+ (or (and (eql 1 count) (logtest events revents))
+ (logtest pollhup revents)))
+ (error "Syscall poll(2) failed: ~A" (strerror))))))))
\f
;;;; sys/select.h
(fd-set-to-num nfds xpf))
nfds (frob rdfds rdf) (frob wrfds wrf) (frob xpfds xpf)
(if to-secs (alien-sap (addr tv)) (int-sap 0))))))
+
+;;; Lisp-side implmentations of FD_FOO macros. Abandon all hope who enters
+;;; here...
+;;;
+(defmacro fd-set (offset fd-set)
+ (with-unique-names (word bit)
+ `(multiple-value-bind (,word ,bit) (floor ,offset
+ sb!vm:n-machine-word-bits)
+ (setf (deref (slot ,fd-set 'fds-bits) ,word)
+ (logior (truly-the (unsigned-byte #.sb!vm:n-machine-word-bits)
+ (ash 1 ,bit))
+ (deref (slot ,fd-set 'fds-bits) ,word))))))
+
+(defmacro fd-clr (offset fd-set)
+ (with-unique-names (word bit)
+ `(multiple-value-bind (,word ,bit) (floor ,offset
+ sb!vm:n-machine-word-bits)
+ (setf (deref (slot ,fd-set 'fds-bits) ,word)
+ (logand (deref (slot ,fd-set 'fds-bits) ,word)
+ (sb!kernel:word-logical-not
+ (truly-the (unsigned-byte #.sb!vm:n-machine-word-bits)
+ (ash 1 ,bit))))))))
+
+(defmacro fd-isset (offset fd-set)
+ (with-unique-names (word bit)
+ `(multiple-value-bind (,word ,bit) (floor ,offset
+ sb!vm:n-machine-word-bits)
+ (logbitp ,bit (deref (slot ,fd-set 'fds-bits) ,word)))))
+
+(defmacro fd-zero (fd-set)
+ `(progn
+ ,@(loop for index upfrom 0 below (/ fd-setsize sb!vm:n-machine-word-bits)
+ collect `(setf (deref (slot ,fd-set 'fds-bits) ,index) 0))))
+
+#!-os-provides-poll
+(defun unix-simple-poll (fd direction to-msec)
+ (multiple-value-bind (to-sec to-usec)
+ (if (minusp to-msec)
+ (values nil nil)
+ (multiple-value-bind (to-sec to-msec2) (truncate to-msec 1000)
+ (values to-sec (* to-msec2 1000))))
+ (sb!unix:with-restarted-syscall (count errno)
+ (sb!alien:with-alien ((fds (sb!alien:struct sb!unix:fd-set)))
+ (sb!unix:fd-zero fds)
+ (sb!unix:fd-set fd fds)
+ (multiple-value-bind (read-fds write-fds)
+ (ecase direction
+ (:input
+ (values (addr fds) nil))
+ (:output
+ (values nil (addr fds))))
+ (sb!unix:unix-fast-select (1+ fd)
+ read-fds write-fds nil
+ to-sec to-usec)))
+ (case count
+ ((1) t)
+ ((0) nil)
+ (otherwise
+ (error "Syscall select(2) failed on fd ~D: ~A" fd (strerror)))))))
\f
;;;; sys/stat.h
;;;; the headers that may or may not be the same thing. To be
;;;; investigated. -- CSR, 2002-03-25
(defconstant wstopped #o177)
-
-\f
-;;;; stuff not yet found in the header files
-;;;;
-;;;; Abandon all hope who enters here...
-
-;;; not checked for linux...
-(defmacro fd-set (offset fd-set)
- (with-unique-names (word bit)
- `(multiple-value-bind (,word ,bit) (floor ,offset
- sb!vm:n-machine-word-bits)
- (setf (deref (slot ,fd-set 'fds-bits) ,word)
- (logior (truly-the (unsigned-byte #.sb!vm:n-machine-word-bits)
- (ash 1 ,bit))
- (deref (slot ,fd-set 'fds-bits) ,word))))))
-
-;;; not checked for linux...
-(defmacro fd-clr (offset fd-set)
- (with-unique-names (word bit)
- `(multiple-value-bind (,word ,bit) (floor ,offset
- sb!vm:n-machine-word-bits)
- (setf (deref (slot ,fd-set 'fds-bits) ,word)
- (logand (deref (slot ,fd-set 'fds-bits) ,word)
- (sb!kernel:word-logical-not
- (truly-the (unsigned-byte #.sb!vm:n-machine-word-bits)
- (ash 1 ,bit))))))))
-
-;;; not checked for linux...
-(defmacro fd-isset (offset fd-set)
- (with-unique-names (word bit)
- `(multiple-value-bind (,word ,bit) (floor ,offset
- sb!vm:n-machine-word-bits)
- (logbitp ,bit (deref (slot ,fd-set 'fds-bits) ,word)))))
-
-;;; not checked for linux...
-(defmacro fd-zero (fd-set)
- `(progn
- ,@(loop for index upfrom 0 below (/ fd-setsize sb!vm:n-machine-word-bits)
- collect `(setf (deref (slot ,fd-set 'fds-bits) ,index) 0))))
-
projects / sbcl.git / blobdiff