\f
;;;; Lisp types used by syscalls
-(deftype unix-pathname () 'simple-base-string)
+(deftype unix-pathname () 'simple-string)
(deftype unix-fd () `(integer 0 ,most-positive-fixnum))
(deftype unix-file-mode () '(unsigned-byte 32))
#!+win32
(progn
- (defconstant o_rdonly 0)
- (defconstant o_wronly 1)
- (defconstant o_rdwr 2)
- (defconstant o_creat #x100)
- (defconstant o_trunc #x200)
- (defconstant o_append #x008)
- (defconstant o_excl #x400)
- (defconstant enoent 2)
- (defconstant eexist 17)
(defconstant espipe 29)
- (defconstant o_binary #x8000)
- (defconstant s-ifmt #xf000)
- (defconstant s-ifdir #x4000)
- (defconstant s-ifreg #x8000)
- (define-alien-type ino-t short)
- (define-alien-type time-t long)
- (define-alien-type off-t long)
- (define-alien-type size-t long)
- (define-alien-type mode-t unsigned-short)
-
;; For stat-wrapper hack (different-type or non-existing win32 fields).
(define-alien-type nlink-t short)
(define-alien-type uid-t short)
\f
;;;; hacking the Unix environment
+#!-win32
(define-alien-routine ("getenv" posix-getenv) c-string
"Return the \"value\" part of the environment string \"name=value\" which
corresponds to NAME, or NIL if there is none."
;;; Rename the file with string NAME1 to the string NAME2. NIL and an
;;; error code is returned if an error occurs.
+#!-win32
(defun unix-rename (name1 name2)
(declare (type unix-pathname name1 name2))
(void-syscall ("rename" c-string c-string) name1 name2))
(declare (type unix-pathname path)
(type fixnum flags)
(type unix-file-mode mode))
- (int-syscall ("open" c-string int int) path (logior #!+win32 o_binary flags) mode))
+ (int-syscall ("open" c-string int int)
+ path
+ (logior #!+win32 o_binary
+ #!+largefile o_largefile
+ flags)
+ mode))
;;; UNIX-CLOSE accepts a file descriptor and attempts to close the file
;;; associated with it.
;; A time value that is accurate to the nearest
;; microsecond but also has a range of years.
+;; CLH: Note that tv-usec used to be a time-t, but that this seems
+;; problematic on Darwin x86-64 (and wrong). Trying suseconds-t.
+#!-win32
(define-alien-type nil
(struct timeval
- (tv-sec time-t) ; seconds
- (tv-usec time-t))) ; and microseconds
+ (tv-sec time-t) ; seconds
+ (tv-usec suseconds-t))) ; and microseconds
+
+#!+win32
+(define-alien-type nil
+ (struct timeval
+ (tv-sec time-t) ; seconds
+ (tv-usec long))) ; and microseconds
\f
;;;; resourcebits.h
;;; w_ok Write permission.
;;; x_ok Execute permission.
;;; f_ok Presence of file.
-#!-win32
+
+;;; In Windows, the MODE argument to access is defined in terms of
+;;; literal magic numbers---there are no constants to grovel. X_OK
+;;; is not defined.
+#!+win32
+(progn
+ (defconstant f_ok 0)
+ (defconstant w_ok 2)
+ (defconstant r_ok 4))
+
(defun unix-access (path mode)
(declare (type unix-pathname path)
(type (mod 8) mode))
"
(declare (type unix-fd fd)
(type (integer 0 2) whence))
- (let ((result (alien-funcall (extern-alien "lseek" (function off-t int off-t int))
+ (let ((result (alien-funcall (extern-alien #!-largefile "lseek"
+ #!+largefile "lseek_largefile"
+ (function off-t int off-t int))
fd offset whence)))
(if (minusp result )
(values nil (get-errno))
(defun unix-read (fd buf len)
(declare (type unix-fd fd)
(type (unsigned-byte 32) len))
-
(int-syscall ("read" int (* char) int) fd buf len))
;;; UNIX-WRITE accepts a file descriptor, a buffer, an offset, and the
(defun unix-write (fd buf offset len)
(declare (type unix-fd fd)
(type (unsigned-byte 32) offset len))
- (int-syscall ("write" int (* char) int)
- fd
- (with-alien ((ptr (* char) (etypecase buf
- ((simple-array * (*))
- (vector-sap buf))
- (system-area-pointer
- buf))))
- (addr (deref ptr offset)))
- len))
+ (flet ((%write (sap)
+ (declare (system-area-pointer sap))
+ (int-syscall ("write" int (* char) int)
+ fd
+ (with-alien ((ptr (* char) sap))
+ (addr (deref ptr offset)))
+ len)))
+ (etypecase buf
+ ((simple-array * (*))
+ (with-pinned-objects (buf)
+ (%write (vector-sap buf))))
+ (system-area-pointer
+ (%write buf)))))
;;; Set up a unix-piping mechanism consisting of an input pipe and an
;;; output pipe. Return two values: if no error occurred the first
(syscall ("pipe" (* int))
(values (deref fds 0) (deref fds 1))
(cast fds (* int)))))
+#!+win32
+(defun msvcrt-raw-pipe (fds size mode)
+ (syscall ("_pipe" (* int) int int)
+ (values (deref fds 0) (deref fds 1))
+ (cast fds (* int)) size mode))
+#!+win32
+(defun unix-pipe ()
+ (with-alien ((fds (array int 2)))
+ (msvcrt-raw-pipe fds 256 o_binary)))
;; Windows mkdir() doesn't take the mode argument. It's cdecl, so we could
;; actually call it passing the mode argument, but some sharp-eyed reader
;; would put five and twenty-seven together and ask us about it, so...
;; -- AB, 2005-12-27
+#!-win32
(defun unix-mkdir (name mode)
(declare (type unix-pathname name)
(type unix-file-mode mode)
;;; Return the Unix current directory as a SIMPLE-STRING, in the
;;; style returned by getcwd() (no trailing slash character).
+#!-win32
(defun posix-getcwd ()
;; This implementation relies on a BSD/Linux extension to getcwd()
;; behavior, automatically allocating memory when a null buffer
\f
;;;; sys/select.h
+(defvar *on-dangerous-select* :warn)
+
+;;; Calling select in a bad place can hang in a nasty manner, so it's better
+;;; to have some way to detect these.
+(defun note-dangerous-select ()
+ (let ((action *on-dangerous-select*)
+ (*on-dangerous-select* nil))
+ (case action
+ (:warn
+ (warn "Starting a select without a timeout while interrupts are ~
+ disabled."))
+ (:error
+ (error "Starting a select without a timeout while interrupts are ~
+ disabled."))
+ (:backtrace
+ (write-line
+ "=== Starting a select without a timeout while interrupts are disabled. ==="
+ *debug-io*)
+ (sb!debug:backtrace)))
+ nil))
+
;;;; FIXME: Why have both UNIX-SELECT and UNIX-FAST-SELECT?
;;; Perform the UNIX select(2) system call.
-(declaim (inline unix-fast-select)) ; (used to be a macro in CMU CL)
+(declaim (inline unix-fast-select))
(defun unix-fast-select (num-descriptors
read-fds write-fds exception-fds
- timeout-secs &optional (timeout-usecs 0))
+ timeout-secs timeout-usecs)
(declare (type (integer 0 #.fd-setsize) num-descriptors)
(type (or (alien (* (struct fd-set))) null)
read-fds write-fds exception-fds)
- (type (or null (unsigned-byte 31)) timeout-secs)
- (type (unsigned-byte 31) timeout-usecs))
- ;; FIXME: CMU CL had
- ;; (declare (optimize (speed 3) (safety 0) (inhibit-warnings 3)))
- ;; here. Is that important for SBCL? If so, why? Profiling might tell us..
- (with-alien ((tv (struct timeval)))
- (when timeout-secs
- (setf (slot tv 'tv-sec) timeout-secs)
- (setf (slot tv 'tv-usec) timeout-usecs))
- (int-syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
- (* (struct fd-set)) (* (struct timeval)))
- num-descriptors read-fds write-fds exception-fds
- (if timeout-secs (alien-sap (addr tv)) (int-sap 0)))))
+ (type (or null (unsigned-byte 31)) timeout-secs timeout-usecs))
+ (flet ((select (tv-sap)
+ (int-syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
+ (* (struct fd-set)) (* (struct timeval)))
+ num-descriptors read-fds write-fds exception-fds
+ tv-sap)))
+ (cond ((or timeout-secs timeout-usecs)
+ (with-alien ((tv (struct timeval)))
+ (setf (slot tv 'tv-sec) (or timeout-secs 0))
+ (setf (slot tv 'tv-usec) (or timeout-usecs 0))
+ (select (alien-sap (addr tv)))))
+ (t
+ (unless *interrupts-enabled*
+ (note-dangerous-select))
+ (select (int-sap 0))))))
;;; UNIX-SELECT accepts sets of file descriptors and waits for an event
;;; to happen on one of them or to time out.
(rdf (struct fd-set))
(wrf (struct fd-set))
(xpf (struct fd-set)))
- (when to-secs
- (setf (slot tv 'tv-sec) to-secs)
- (setf (slot tv 'tv-usec) to-usecs))
+ (cond (to-secs
+ (setf (slot tv 'tv-sec) to-secs
+ (slot tv 'tv-usec) to-usecs))
+ ((not *interrupts-enabled*)
+ (note-dangerous-select)))
(num-to-fd-set rdf rdfds)
(num-to-fd-set wrf wrfds)
(num-to-fd-set xpf xpfds)
(int-sap 0)
(alien-sap (addr ,alienvar)))))
(syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
- (* (struct fd-set)) (* (struct timeval)))
+ (* (struct fd-set)) (* (struct timeval)))
(values result
(fd-set-to-num nfds rdf)
(fd-set-to-num nfds wrf)
;;; longer than 32 bits anyway, right?":-|
(define-alien-type nil
(struct wrapped_stat
- #!-mips
- (st-dev unsigned-int) ; would be dev-t in a real stat
- #!+mips
- (st-dev unsigned-long) ; this is _not_ a dev-t on mips
+ (st-dev #!-(or mips largefile) unsigned-int
+ #!+mips unsigned-long
+ #!+largefile dev-t)
(st-ino ino-t)
(st-mode mode-t)
(st-nlink nlink-t)
(st-uid uid-t)
(st-gid gid-t)
- #!-mips
- (st-rdev unsigned-int) ; would be dev-t in a real stat
- #!+mips
- (st-rdev unsigned-long) ; this is _not_ a dev-t on mips
- #!-mips
- (st-size unsigned-int) ; would be off-t in a real stat
- #!+mips
- (st-size off-t)
+ (st-rdev #!-(or mips largefile) unsigned-int
+ #!+mips unsigned-long
+ #!+largefile dev-t)
+ (st-size #!-(or darwin mips largefile) unsigned-int
+ #!+(or darwin mips largefile) off-t)
+ #!+(and darwin)
+ (st-blksize unsigned-int)
+ #!-(and darwin)
(st-blksize unsigned-long)
(st-blocks unsigned-long)
(st-atime time-t)
;;; doesn't work, it returns NIL and the errno.
#!-sb-fluid (declaim (inline unix-gettimeofday))
(defun unix-gettimeofday ()
+ #!+(and x86-64 darwin)
+ (with-alien ((tv (struct timeval)))
+ ;; CLH: FIXME! This seems to be a MacOS bug, but on x86-64/darwin,
+ ;; gettimeofday occasionally fails. passing in a null pointer for
+ ;; the timezone struct seems to work around the problem. I can't
+ ;; find any instances in the SBCL where we actually ues the
+ ;; timezone values, so we just punt for the moment.
+ (syscall* ("gettimeofday" (* (struct timeval))
+ (* (struct timezone)))
+ (values t
+ (slot tv 'tv-sec)
+ (slot tv 'tv-usec))
+ (addr tv)
+ nil))
+ #!-(and x86-64 darwin)
(with-alien ((tv (struct timeval))
(tz (struct timezone)))
(syscall* ("gettimeofday" (* (struct timeval))
(defun unix-file-kind (name &optional check-for-links)
#!+sb-doc
"Return either :FILE, :DIRECTORY, :LINK, :SPECIAL, or NIL."
- (declare (simple-base-string name))
+ (declare (simple-string name))
(multiple-value-bind (res dev ino mode)
(if check-for-links (unix-lstat name) (unix-stat name))
(declare (type (or fixnum null) mode)
;;; paths have been converted to absolute paths, so we don't need to
;;; try to handle any more generality than that.
(defun unix-resolve-links (pathname)
- (declare (type simple-base-string pathname))
+ (declare (type simple-string pathname))
;; KLUDGE: The Win32 platform doesn't have symbolic links, so
;; short-cut this computation (and the check for being an absolute
;; unix pathname...)
;; KLUDGE: readlink and lstat are unreliable if given symlinks
;; ending in slashes -- fix the issue here instead of waiting for
;; libc to change...
+ ;;
+ ;; but be careful! Must not strip the final slash from "/". (This
+ ;; adjustment might be a candidate for being transferred into the C
+ ;; code in a wrap_readlink() function, too.) CSR, 2006-01-18
(let ((len (length pathname)))
- (when (and (plusp len) (eql #\/ (schar pathname (1- len))))
+ (when (and (> len 1) (eql #\/ (schar pathname (1- len))))
(setf pathname (subseq pathname 0 (1- len)))))
(/noshow "entering UNIX-RESOLVE-LINKS")
(loop with previous-pathnames = nil do
(if (null link)
(return pathname)
(let ((new-pathname
- (unix-simplify-pathname
+ (simplify-namestring
(if (relative-unix-pathname? link)
(let* ((dir-len (1+ (position #\/
pathname
:from-end t)))
(dir (subseq pathname 0 dir-len)))
(/noshow dir)
- (concatenate 'base-string dir link))
+ (concatenate 'string dir link))
link))))
(if (unix-file-kind new-pathname)
(setf pathname new-pathname)
(if (member pathname previous-pathnames :test #'string=)
(return pathname)
(push pathname previous-pathnames))))
+\f
-(defun unix-simplify-pathname (src)
- (declare (type simple-base-string src))
- (let* ((src-len (length src))
- (dst (make-string src-len :element-type 'base-char))
- (dst-len 0)
- (dots 0)
- (last-slash nil))
- (macrolet ((deposit (char)
- `(progn
- (setf (schar dst dst-len) ,char)
- (incf dst-len))))
- (dotimes (src-index src-len)
- (let ((char (schar src src-index)))
- (cond ((char= char #\.)
- (when dots
- (incf dots))
- (deposit char))
- ((char= char #\/)
- (case dots
- (0
- ;; either ``/...' or ``...//...'
- (unless last-slash
- (setf last-slash dst-len)
- (deposit char)))
- (1
- ;; either ``./...'' or ``..././...''
- (decf dst-len))
- (2
- ;; We've found ..
- (cond
- ((and last-slash (not (zerop last-slash)))
- ;; There is something before this ..
- (let ((prev-prev-slash
- (position #\/ dst :end last-slash :from-end t)))
- (cond ((and (= (+ (or prev-prev-slash 0) 2)
- last-slash)
- (char= (schar dst (- last-slash 2)) #\.)
- (char= (schar dst (1- last-slash)) #\.))
- ;; The something before this .. is another ..
- (deposit char)
- (setf last-slash dst-len))
- (t
- ;; The something is some directory or other.
- (setf dst-len
- (if prev-prev-slash
- (1+ prev-prev-slash)
- 0))
- (setf last-slash prev-prev-slash)))))
- (t
- ;; There is nothing before this .., so we need to keep it
- (setf last-slash dst-len)
- (deposit char))))
- (t
- ;; something other than a dot between slashes
- (setf last-slash dst-len)
- (deposit char)))
- (setf dots 0))
- (t
- (setf dots nil)
- (setf (schar dst dst-len) char)
- (incf dst-len))))))
- (when (and last-slash (not (zerop last-slash)))
- (case dots
- (1
- ;; We've got ``foobar/.''
- (decf dst-len))
- (2
- ;; We've got ``foobar/..''
- (unless (and (>= last-slash 2)
- (char= (schar dst (1- last-slash)) #\.)
- (char= (schar dst (- last-slash 2)) #\.)
- (or (= last-slash 2)
- (char= (schar dst (- last-slash 3)) #\/)))
- (let ((prev-prev-slash
- (position #\/ dst :end last-slash :from-end t)))
- (if prev-prev-slash
- (setf dst-len (1+ prev-prev-slash))
- (return-from unix-simplify-pathname
- (coerce "./" 'simple-base-string))))))))
- (cond ((zerop dst-len)
- "./")
- ((= dst-len src-len)
- dst)
- (t
- (subseq dst 0 dst-len)))))
+(defconstant micro-seconds-per-internal-time-unit
+ (/ 1000000 sb!xc:internal-time-units-per-second))
+
+;;; UNIX specific code, that has been cleanly separated from the
+;;; Windows build.
+#!-win32
+(progn
+ (declaim (inline system-internal-run-time
+ system-real-time-values))
+
+ (defun system-real-time-values ()
+ (multiple-value-bind (_ sec usec) (unix-gettimeofday)
+ (declare (ignore _) (type (unsigned-byte 32) sec usec))
+ (values sec (truncate usec micro-seconds-per-internal-time-unit))))
+
+ ;; There are two optimizations here that actually matter (on 32-bit
+ ;; systems): substract the epoch from seconds and milliseconds
+ ;; separately, as those should remain fixnums for the first 17 years
+ ;; or so of runtime. Also, avoid doing consing a new bignum if the
+ ;; result would be = to the last result given.
+ ;;
+ ;; Note: the next trick would be to spin a separate thread to update
+ ;; a global value once per internal tick, so each individual call to
+ ;; get-internal-real-time would be just a memory read... but that is
+ ;; probably best left for user-level code. ;)
+ ;;
+ ;; Thanks to James Anderson for the optimization hint.
+ ;;
+ ;; Yes, it is possible to a computation to be GET-INTERNAL-REAL-TIME
+ ;; bound.
+ ;;
+ ;; --NS 2007-04-05
+ (let ((e-sec 0)
+ (e-msec 0)
+ (c-sec 0)
+ (c-msec 0)
+ (now 0))
+ (declare (type (unsigned-byte 32) e-sec c-sec)
+ (type fixnum e-msec c-msec)
+ (type unsigned-byte now))
+ (defun reinit-internal-real-time ()
+ (setf (values e-sec e-msec) (system-real-time-values)
+ c-sec 0
+ c-msec 0))
+ ;; If two threads call this at the same time, we're still safe, I believe,
+ ;; as long as NOW is updated before either of C-MSEC or C-SEC. Same applies
+ ;; to interrupts. --NS
+ (defun get-internal-real-time ()
+ (multiple-value-bind (sec msec) (system-real-time-values)
+ (unless (and (= msec c-msec) (= sec c-sec))
+ (setf now (+ (* (- sec e-sec)
+ sb!xc:internal-time-units-per-second)
+ (- msec e-msec))
+ c-msec msec
+ c-sec sec))
+ now)))
+
+ (defun system-internal-run-time ()
+ (multiple-value-bind (ignore utime-sec utime-usec stime-sec stime-usec)
+ (unix-fast-getrusage rusage_self)
+ (declare (ignore ignore)
+ (type (unsigned-byte 31) utime-sec stime-sec)
+ ;; (Classic CMU CL had these (MOD 1000000) instead, but
+ ;; at least in Linux 2.2.12, the type doesn't seem to
+ ;; be documented anywhere and the observed behavior is
+ ;; to sometimes return 1000000 exactly.)
+ (type (integer 0 1000000) utime-usec stime-usec))
+ (let ((result (+ (* (+ utime-sec stime-sec)
+ sb!xc:internal-time-units-per-second)
+ (floor (+ utime-usec
+ stime-usec
+ (floor micro-seconds-per-internal-time-unit 2))
+ micro-seconds-per-internal-time-unit))))
+ result))))
\f
;;;; A magic constant for wait3().
;;;;
`(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