(/show0 "unix.lisp 21")
-(defmacro def-enum (inc cur &rest names)
- (flet ((defform (name)
- (prog1 (when name `(defconstant ,name ,cur))
- (setf cur (funcall inc cur 1)))))
- `(progn ,@(mapcar #'defform names))))
-
;;; Given a C-level zero-terminated array of C strings, return a
;;; corresponding Lisp-level list of SIMPLE-STRINGs.
(defun c-strings->string-list (c-strings)
;;;; Lisp types used by syscalls
(deftype unix-pathname () 'simple-string)
-(deftype unix-fd () `(integer 0 ,most-positive-fixnum))
+(deftype unix-fd () `(integer 0 ,sb!xc:most-positive-fixnum))
(deftype unix-file-mode () '(unsigned-byte 32))
(deftype unix-pid () '(unsigned-byte 32))
;;; FIXME: The various FOO-SYSCALL-BAR macros, and perhaps some other
;;; macros in this file, are only used in this file, and could be
;;; implemented using SB!XC:DEFMACRO wrapped in EVAL-WHEN.
+;;;
+;;; SB-EXECUTABLE, at least, uses one of these macros; other libraries
+;;; and programs have been known to use them as well. Perhaps they
+;;; should live in SB-SYS or even SB-EXT?
(defmacro syscall ((name &rest arg-types) success-form &rest args)
+ (when (eql 3 (mismatch "[_]" name))
+ (setf name
+ (concatenate 'string #!+win32 "_" (subseq name 3))))
`(locally
(declare (optimize (sb!c::float-accuracy 0)))
(let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types))
(error "Syscall ~A failed: ~A" ,name (strerror))
,success-form))))
-(/show0 "unix.lisp 109")
-
-(defmacro void-syscall ((name &rest arg-types) &rest args)
- `(syscall (,name ,@arg-types) (values t 0) ,@args))
-
(defmacro int-syscall ((name &rest arg-types) &rest args)
`(syscall (,name ,@arg-types) (values result 0) ,@args))
(return (values ,value ,errno))))
,@body))
+(defmacro void-syscall ((name &rest arg-types) &rest args)
+ `(syscall (,name ,@arg-types) (values t 0) ,@args))
+
#!+win32
(progn
- (defconstant espipe 29)
- ;; For stat-wrapper hack (different-type or non-existing win32 fields).
- (define-alien-type nlink-t short)
- (define-alien-type uid-t short)
- (define-alien-type gid-t short))
+ (defconstant espipe 29))
\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."
- (name c-string))
+corresponds to NAME, or NIL if there is none."
+ (name (c-string :not-null t)))
\f
;;; from stdio.h
#!-win32
(defun unix-rename (name1 name2)
(declare (type unix-pathname name1 name2))
- (void-syscall ("rename" c-string c-string) name1 name2))
+ (void-syscall ("rename" (c-string :not-null t)
+ (c-string :not-null t))
+ name1 name2))
\f
;;; from sys/types.h and gnu/types.h
;;; is not extreme enough, since it doesn't need to be blindingly
;;; fast: we can just implement those functions in C as a wrapper
;;; layer.
-(define-alien-type fd-mask unsigned-long)
-
-(eval-when (:compile-toplevel :load-toplevel :execute)
- (defconstant fd-setsize 1024))
+(define-alien-type fd-mask unsigned)
(define-alien-type nil
(struct fd-set
(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))
+ #!+win32 (sb!win32:unixlike-open path flags mode)
+ #!-win32
+ (with-restarted-syscall (value errno)
+ (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.
(/show0 "unix.lisp 391")
(defun unix-close (fd)
- (declare (type unix-fd fd))
- (void-syscall ("close" int) fd))
+ #!+win32 (sb!win32:unixlike-close fd)
+ #!-win32 (declare (type unix-fd fd))
+ #!-win32 (void-syscall ("close" int) fd))
\f
-;;;; timebits.h
-
-;; A time value that is accurate to the nearest
-;; microsecond but also has a range of years.
-(define-alien-type nil
- (struct timeval
- (tv-sec time-t) ; seconds
- (tv-usec time-t))) ; and microseconds
+;;;; stdlib.h
+
+;;; There are good reasons to implement some OPEN options with an
+;;; mkstemp(3)-like routine, but we don't do that yet. Instead, this
+;;; function is used only to make a temporary file for RUN-PROGRAM.
+;;; sb_mkstemp() is a wrapper that lives in src/runtime/wrap.c. Since
+;;; SUSv3 mkstemp() doesn't specify the mode of the created file and
+;;; since we have to implement most of this ourselves for Windows
+;;; anyway, it seems worthwhile to depart from the mkstemp()
+;;; specification by taking a mode to use when creating the new file.
+(defun sb-mkstemp (template-string mode)
+ (declare (type string template-string)
+ (type unix-file-mode mode))
+ (let ((template-buffer (string-to-octets template-string :null-terminate t)))
+ (with-pinned-objects (template-buffer)
+ (let ((fd (alien-funcall (extern-alien "sb_mkstemp"
+ (function int (* char) int))
+ (vector-sap template-buffer)
+ mode)))
+ (if (minusp fd)
+ (values nil (get-errno))
+ (values #!-win32 fd #!+win32 (sb!win32::duplicate-and-unwrap-fd fd)
+ (octets-to-string template-buffer)))))))
\f
;;;; resourcebits.h
(defun unix-access (path mode)
(declare (type unix-pathname path)
(type (mod 8) mode))
- (void-syscall ("access" c-string int) path mode))
+ (void-syscall ("[_]access" c-string int) path mode))
;;; values for the second argument to UNIX-LSEEK
+;;; Note that nowadays these are called SEEK_SET, SEEK_CUR, and SEEK_END
(defconstant l_set 0) ; to set the file pointer
(defconstant l_incr 1) ; to increment the file pointer
(defconstant l_xtnd 2) ; to extend the file size
+;; off_t is 32 bit on Windows, yet our functions support 64 bit seeks.
+(define-alien-type unix-offset
+ #!-win32 off-t
+ #!+win32 (signed 64))
+
;;; Is a stream interactive?
(defun unix-isatty (fd)
(declare (type unix-fd fd))
- (int-syscall ("isatty" int) fd))
+ #!-win32 (int-syscall ("isatty" int) fd)
+ #!+win32 (sb!win32::windows-isatty fd))
(defun unix-lseek (fd offset whence)
"Unix-lseek accepts a file descriptor and moves the file pointer by
"
(declare (type unix-fd fd)
(type (integer 0 2) whence))
- (let ((result (alien-funcall (extern-alien "lseek" (function off-t int off-t int))
- fd offset whence)))
- (if (minusp result )
+ (let ((result
+ #!-win32
+ (alien-funcall (extern-alien #!-largefile "lseek"
+ #!+largefile "lseek_largefile"
+ (function off-t int off-t int))
+ fd offset whence)
+ #!+win32 (sb!win32:lseeki64 fd offset whence)))
+ (if (minusp result)
(values nil (get-errno))
(values result 0))))
;;; It attempts to read len bytes from the device associated with fd
;;; and store them into the buffer. It returns the actual number of
;;; bytes read.
+
+#!-sb!fluid
+(declaim (maybe-inline unix-read))
+
(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))
+ (int-syscall (#!-win32 "read" #!+win32 "win32_unix_read"
+ int (* char) int) fd buf len))
;;; UNIX-WRITE accepts a file descriptor, a buffer, an offset, and the
;;; length to write. It attempts to write len bytes to the device
(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 (#!-win32 "write" #!+win32 "win32_unix_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)))
+ (sb!win32::windows-pipe))
;; 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
;; helpful, either, as Solaris doesn't export PATH_MAX from
;; unistd.h.
;;
- ;; FIXME: The (,stub,) nastiness produces an error message about a
- ;; comma not inside a backquote. This error has absolutely nothing
- ;; to do with the actual meaning of the error (and little to do with
- ;; its location, either).
- #!-(or linux openbsd freebsd netbsd sunos osf1 darwin win32) (,stub,)
- #!+(or linux openbsd freebsd netbsd sunos osf1 darwin win32)
+ ;; Signal an error at compile-time, since it's needed for the
+ ;; runtime to start up
+ #!-(or linux openbsd freebsd netbsd sunos osf1 darwin hpux win32)
+ #.(error "POSIX-GETCWD is not implemented.")
+ #!+(or linux openbsd freebsd netbsd sunos osf1 darwin hpux win32)
(or (newcharstar-string (alien-funcall (extern-alien "getcwd"
(function (* char)
(* char)
size-t))
nil
#!+(or linux openbsd freebsd netbsd darwin win32) 0
- #!+(or sunos osf1) 1025))
+ #!+(or sunos osf1 hpux) 1025))
(simple-perror "getcwd")))
;;; Return the Unix current directory as a SIMPLE-STRING terminated
;;; Duplicate an existing file descriptor (given as the argument) and
;;; return it. If FD is not a valid file descriptor, NIL and an error
;;; number are returned.
+#!-win32
(defun unix-dup (fd)
(declare (type unix-fd fd))
(int-syscall ("dup" int) fd))
;;; Terminate the current process with an optional error code. If
;;; successful, the call doesn't return. If unsuccessful, the call
;;; returns NIL and an error number.
-(defun unix-exit (&optional (code 0))
- (declare (type (signed-byte 32) code))
- (void-syscall ("exit" int) code))
+(deftype exit-code ()
+ `(signed-byte 32))
+(defun os-exit (code &key abort)
+ #!+sb-doc
+ "Exit the process with CODE. If ABORT is true, exit is performed using _exit(2),
+avoiding atexit(3) hooks, etc. Otherwise exit(2) is called."
+ (unless (typep code 'exit-code)
+ (setf code (if abort 1 0)))
+ (if abort
+ (void-syscall ("_exit" int) code)
+ (void-syscall ("exit" int) code)))
+
+(define-deprecated-function :early "1.0.56.55" unix-exit os-exit (code)
+ (os-exit code))
;;; Return the process id of the current process.
-(define-alien-routine ("getpid" unix-getpid) int)
+(define-alien-routine (#!+win32 "_getpid" #!-win32 "getpid" unix-getpid) int)
;;; Return the real user id associated with the current process.
#!-win32
;;; Return the namestring of the home directory, being careful to
;;; include a trailing #\/
#!-win32
-(defun uid-homedir (uid)
- (or (newcharstar-string (alien-funcall (extern-alien "uid_homedir"
- (function (* char) int))
- uid))
- (error "failed to resolve home directory for Unix uid=~S" uid)))
+(progn
+ (defun uid-homedir (uid)
+ (or (newcharstar-string (alien-funcall (extern-alien "uid_homedir"
+ (function (* char) int))
+ uid))
+ (error "failed to resolve home directory for Unix uid=~S" uid)))
+
+ (defun user-homedir (uid)
+ (or (newcharstar-string (alien-funcall (extern-alien "user_homedir"
+ (function (* char) c-string))
+ uid))
+ (error "failed to resolve home directory for Unix uid=~S" uid))))
;;; Invoke readlink(2) on the file name specified by PATH. Return
;;; (VALUES LINKSTRING NIL) on success, or (VALUES NIL ERRNO) on
(declare (ignore path))
nil)
+(defun unix-realpath (path)
+ (declare (type unix-pathname path))
+ (with-alien ((ptr (* char)
+ (alien-funcall (extern-alien
+ "sb_realpath"
+ (function (* char) c-string))
+ path)))
+ (if (null-alien ptr)
+ (values nil (get-errno))
+ (multiple-value-prog1
+ (values (with-alien ((c-string c-string ptr)) c-string)
+ nil)
+ (free-alien ptr)))))
+
;;; UNIX-UNLINK accepts a name and deletes the directory entry for that
;;; name and the file if this is the last link.
(defun unix-unlink (name)
(declare (type unix-pathname name))
- (void-syscall ("unlink" c-string) name))
+ (void-syscall ("[_]unlink" c-string) name))
;;; Return the name of the host machine as a string.
#!-win32
#!-win32
(defun unix-fast-getrusage (who)
(declare (values (member t)
- (unsigned-byte 31) (integer 0 1000000)
- (unsigned-byte 31) (integer 0 1000000)))
+ unsigned-byte fixnum
+ unsigned-byte fixnum))
(with-alien ((usage (struct rusage)))
- (syscall* ("getrusage" int (* (struct rusage)))
+ (syscall* ("sb_getrusage" int (* (struct rusage)))
(values t
(slot (slot usage 'ru-utime) 'tv-sec)
(slot (slot usage 'ru-utime) 'tv-usec)
#!-win32
(defun unix-getrusage (who)
(with-alien ((usage (struct rusage)))
- (syscall ("getrusage" int (* (struct rusage)))
+ (syscall ("sb_getrusage" int (* (struct rusage)))
(values t
(+ (* (slot (slot usage 'ru-utime) 'tv-sec) 1000000)
(slot (slot usage 'ru-utime) 'tv-usec))
(slot usage 'ru-nivcsw))
who (addr usage))))
\f
+(defvar *on-dangerous-wait* :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-wait (type)
+ (let ((action *on-dangerous-wait*)
+ (*on-dangerous-wait* nil))
+ (case action
+ (:warn
+ (warn "Starting a ~A without a timeout while interrupts are ~
+ disabled."
+ type))
+ (:error
+ (error "Starting a ~A without a timeout while interrupts are ~
+ disabled."
+ type))
+ (:backtrace
+ (format *debug-io*
+ "~&=== Starting a ~A without a timeout while interrupts are disabled. ===~%"
+ type)
+ (sb!debug:backtrace)))
+ nil))
+\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
+(defmacro with-fd-setsize ((n) &body body)
+ `(let ((,n (if (< 0 ,n fd-setsize)
+ ,n
+ (error "Cannot select(2) on ~D: above FD_SETSIZE limit."
+ (1- ,n)))))
+ (declare (type (integer 0 #.fd-setsize) ,n))
+ ,@body))
+
;;;; 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))
- (declare (type (integer 0 #.fd-setsize) num-descriptors)
+ timeout-secs timeout-usecs)
+ (declare (type integer 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))
+ (with-fd-setsize (num-descriptors)
+ (flet ((select (tv-sap)
+ (int-syscall ("sb_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-wait "select(2)"))
+ (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.
-(defmacro num-to-fd-set (fdset num)
- `(if (fixnump ,num)
- (progn
- (setf (deref (slot ,fdset 'fds-bits) 0) ,num)
- ,@(loop for index upfrom 1 below (/ fd-setsize
- sb!vm:n-machine-word-bits)
- collect `(setf (deref (slot ,fdset 'fds-bits) ,index) 0)))
- (progn
- ,@(loop for index upfrom 0 below (/ fd-setsize
- sb!vm:n-machine-word-bits)
- collect `(setf (deref (slot ,fdset 'fds-bits) ,index)
- (ldb (byte sb!vm:n-machine-word-bits
- ,(* index sb!vm:n-machine-word-bits))
- ,num))))))
-
-(defmacro fd-set-to-num (nfds fdset)
- `(if (<= ,nfds sb!vm:n-machine-word-bits)
- (deref (slot ,fdset 'fds-bits) 0)
- (+ ,@(loop for index upfrom 0 below (/ fd-setsize
- sb!vm:n-machine-word-bits)
- collect `(ash (deref (slot ,fdset 'fds-bits) ,index)
- ,(* index sb!vm:n-machine-word-bits))))))
+(declaim (inline num-to-fd-set fd-set-to-num))
+(defun num-to-fd-set (fdset num)
+ (typecase num
+ (fixnum
+ (setf (deref (slot fdset 'fds-bits) 0) num)
+ (loop for index from 1 below (/ fd-setsize
+ sb!vm:n-machine-word-bits)
+ do (setf (deref (slot fdset 'fds-bits) index) 0)))
+ (t
+ (loop for index from 0 below (/ fd-setsize
+ sb!vm:n-machine-word-bits)
+ do (setf (deref (slot fdset 'fds-bits) index)
+ (ldb (byte sb!vm:n-machine-word-bits
+ (* index sb!vm:n-machine-word-bits))
+ num))))))
+
+(defun fd-set-to-num (nfds fdset)
+ (if (<= nfds sb!vm:n-machine-word-bits)
+ (deref (slot fdset 'fds-bits) 0)
+ (loop for index below (/ fd-setsize
+ sb!vm:n-machine-word-bits)
+ sum (ash (deref (slot fdset 'fds-bits) index)
+ (* index sb!vm:n-machine-word-bits)))))
;;; Examine the sets of descriptors passed as arguments to see whether
;;; they are ready for reading and writing. See the UNIX Programmer's
;;; Manual for more information.
(defun unix-select (nfds rdfds wrfds xpfds to-secs &optional (to-usecs 0))
- (declare (type (integer 0 #.fd-setsize) nfds)
+ (declare (type integer nfds)
(type unsigned-byte rdfds wrfds xpfds)
(type (or (unsigned-byte 31) null) to-secs)
(type (unsigned-byte 31) to-usecs)
- (optimize (speed 3) (safety 0) (inhibit-warnings 3)))
- (with-alien ((tv (struct timeval))
- (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))
- (num-to-fd-set rdf rdfds)
- (num-to-fd-set wrf wrfds)
- (num-to-fd-set xpf xpfds)
- (macrolet ((frob (lispvar alienvar)
- `(if (zerop ,lispvar)
- (int-sap 0)
- (alien-sap (addr ,alienvar)))))
- (syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
- (* (struct fd-set)) (* (struct timeval)))
- (values result
- (fd-set-to-num nfds rdf)
- (fd-set-to-num nfds wrf)
- (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))))))
+ (optimize (speed 3) (safety 0)))
+ (with-fd-setsize (nfds)
+ (with-alien ((tv (struct timeval))
+ (rdf (struct fd-set))
+ (wrf (struct fd-set))
+ (xpf (struct fd-set)))
+ (cond (to-secs
+ (setf (slot tv 'tv-sec) to-secs
+ (slot tv 'tv-usec) to-usecs))
+ ((not *interrupts-enabled*)
+ (note-dangerous-wait "select(2)")))
+ (num-to-fd-set rdf rdfds)
+ (num-to-fd-set wrf wrfds)
+ (num-to-fd-set xpf xpfds)
+ (macrolet ((frob (lispvar alienvar)
+ `(if (zerop ,lispvar)
+ (int-sap 0)
+ (alien-sap (addr ,alienvar)))))
+ (syscall ("sb_select" int (* (struct fd-set)) (* (struct fd-set))
+ (* (struct fd-set)) (* (struct timeval)))
+ (values result
+ (fd-set-to-num nfds rdf)
+ (fd-set-to-num nfds wrf)
+ (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.
+(declaim (inline fd-set fd-clr fd-isset fd-zero))
+(defun fd-set (offset fd-set)
+ (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)))))
+
+(defun fd-clr (offset fd-set)
+ (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)))))))
+
+(defun fd-isset (offset fd-set)
+ (multiple-value-bind (word bit) (floor offset
+ sb!vm:n-machine-word-bits)
+ (logbitp bit (deref (slot fd-set 'fds-bits) word))))
+
+(defun fd-zero (fd-set)
+ (loop for index below (/ fd-setsize sb!vm:n-machine-word-bits)
+ do (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
;;; st_size is a long, not an off-t, because off-t is a 64-bit
;;; quantity on Alpha. And FIXME: "No one would want a file length
;;; longer than 32 bits anyway, right?":-|
+;;;
+;;; The comment about alien and 64-bit quantities has not been kept in
+;;; sync with the comment now in wrap.h (formerly wrap.c), but it's
+;;; not clear whether either comment is correct. -- RMK 2007-11-14.
(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 wst-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-blksize unsigned-long)
- (st-blocks unsigned-long)
+ (st-nlink wst-nlink-t)
+ (st-uid wst-uid-t)
+ (st-gid wst-gid-t)
+ (st-rdev wst-dev-t)
+ (st-size wst-off-t)
+ (st-blksize wst-blksize-t)
+ (st-blocks wst-blkcnt-t)
(st-atime time-t)
(st-mtime time-t)
(st-ctime time-t)))
(%extract-stat-results (addr buf))
name (addr buf))))
(defun unix-fstat (fd)
+ #!-win32
(declare (type unix-fd fd))
- (with-alien ((buf (struct wrapped_stat)))
- (syscall ("fstat_wrapper" int (* (struct wrapped_stat)))
- (%extract-stat-results (addr buf))
- fd (addr buf))))
+ (#!-win32 funcall #!+win32 sb!win32::call-with-crt-fd
+ (lambda (fd)
+ (with-alien ((buf (struct wrapped_stat)))
+ (syscall ("fstat_wrapper" int (* (struct wrapped_stat)))
+ (%extract-stat-results (addr buf))
+ fd (addr buf))))
+ fd))
+
+#!-win32
+(defun fd-type (fd)
+ (declare (type unix-fd fd))
+ (let ((fmt (logand
+ sb!unix:s-ifmt
+ (or (with-alien ((buf (struct wrapped_stat)))
+ (syscall ("fstat_wrapper" int (* (struct wrapped_stat)))
+ (slot buf 'st-mode)
+ fd (addr buf)))
+ 0))))
+ (cond ((logtest sb!unix:s-ififo fmt)
+ :fifo)
+ ((logtest sb!unix:s-ifchr fmt)
+ :character)
+ ((logtest sb!unix:s-ifdir fmt)
+ :directory)
+ ((logtest sb!unix:s-ifblk fmt)
+ :block)
+ ((logtest sb!unix:s-ifreg fmt)
+ :regular)
+ ((logtest sb!unix:s-ifsock fmt)
+ :socket)
+ (t
+ :unknown))))
\f
;;;; time.h
-;; the POSIX.4 structure for a time value. This is like a "struct
-;; timeval" but has nanoseconds instead of microseconds.
-(define-alien-type nil
- (struct timespec
- (tv-sec long) ; seconds
- (tv-nsec long))) ; nanoseconds
-
;; used by other time functions
(define-alien-type nil
(struct tm
(tm-zone c-string))) ; Timezone abbreviation.
(define-alien-routine get-timezone sb!alien:void
- (when sb!alien:long :in)
+ (when time-t :in)
(seconds-west sb!alien:int :out)
(daylight-savings-p sb!alien:boolean :out))
(defun nanosleep (secs nsecs)
(with-alien ((req (struct timespec))
(rem (struct timespec)))
- (setf (slot req 'tv-sec) secs)
- (setf (slot req 'tv-nsec) nsecs)
- (loop while (eql sb!unix:eintr
- (nth-value 1
- (int-syscall ("nanosleep" (* (struct timespec))
- (* (struct timespec)))
- (addr req) (addr rem))))
- do (rotatef req rem))))
+ (setf (slot req 'tv-sec) secs
+ (slot req 'tv-nsec) nsecs)
+ (loop while (and (eql sb!unix:eintr
+ (nth-value 1
+ (int-syscall ("sb_nanosleep" (* (struct timespec))
+ (* (struct timespec)))
+ (addr req) (addr rem))))
+ ;; KLUDGE: On Darwin, if an interrupt cases nanosleep to
+ ;; take longer than the requested time, the call will
+ ;; return with EINT and (unsigned)-1 seconds in the
+ ;; remainder timespec, which would cause us to enter
+ ;; nanosleep again for ~136 years. So, we check that the
+ ;; remainder time is actually decreasing.
+ ;;
+ ;; It would be neat to do this bit of defensive
+ ;; programming on all platforms, but unfortunately on
+ ;; Linux, REM can be a little higher than REQ if the
+ ;; nanosleep() call is interrupted quickly enough,
+ ;; probably due to the request being rounded up to the
+ ;; nearest HZ. This would cause the sleep to return way
+ ;; too early.
+ #!+darwin
+ (let ((rem-sec (slot rem 'tv-sec))
+ (rem-nsec (slot rem 'tv-nsec)))
+ (when (or (> secs rem-sec)
+ (and (= secs rem-sec) (>= nsecs rem-nsec)))
+ ;; Update for next round.
+ (setf secs rem-sec
+ nsecs rem-nsec)
+ t)))
+ do (setf (slot req 'tv-sec) (slot rem 'tv-sec)
+ (slot req 'tv-nsec) (slot rem 'tv-nsec)))))
(defun unix-get-seconds-west (secs)
(multiple-value-bind (ignore seconds dst) (get-timezone secs)
(struct timezone
(tz-minuteswest int) ; minutes west of Greenwich
(tz-dsttime int))) ; type of dst correction
-
-;;; If it works, UNIX-GETTIMEOFDAY returns 5 values: T, the seconds
-;;; and microseconds of the current time of day, the timezone (in
-;;; minutes west of Greenwich), and a daylight-savings flag. If it
-;;; doesn't work, it returns NIL and the errno.
-#!-sb-fluid (declaim (inline unix-gettimeofday))
-(defun unix-gettimeofday ()
- (with-alien ((tv (struct timeval))
- (tz (struct timezone)))
- (syscall* ("gettimeofday" (* (struct timeval))
- (* (struct timezone)))
- (values t
- (slot tv 'tv-sec)
- (slot tv 'tv-usec)
- (slot tz 'tz-minuteswest)
- (slot tz 'tz-dsttime))
- (addr tv)
- (addr tz))))
\f
;; Type of the second argument to `getitimer' and
T, it-interval-secs, it-interval-usec, it-value-secs, it-value-usec."
(declare (type (member :real :virtual :profile) which)
(values t
- (unsigned-byte 29) (mod 1000000)
- (unsigned-byte 29) (mod 1000000)))
+ unsigned-byte (mod 1000000)
+ unsigned-byte (mod 1000000)))
(let ((which (ecase which
(:real itimer-real)
(:virtual itimer-virtual)
(:profile itimer-prof))))
(with-alien ((itv (struct itimerval)))
- (syscall* ("getitimer" int (* (struct itimerval)))
+ (syscall* ("sb_getitimer" int (* (struct itimerval)))
(values t
(slot (slot itv 'it-interval) 'tv-sec)
(slot (slot itv 'it-interval) 'tv-usec)
unix-setitimer returns the old contents of the INTERVAL and VALUE
slots as in unix-getitimer."
(declare (type (member :real :virtual :profile) which)
- (type (unsigned-byte 29) int-secs val-secs)
+ (type unsigned-byte int-secs val-secs)
(type (integer 0 (1000000)) int-usec val-usec)
(values t
- (unsigned-byte 29) (mod 1000000)
- (unsigned-byte 29) (mod 1000000)))
+ unsigned-byte (mod 1000000)
+ unsigned-byte (mod 1000000)))
(let ((which (ecase which
(:real itimer-real)
(:virtual itimer-virtual)
(slot (slot itvn 'it-interval) 'tv-usec) int-usec
(slot (slot itvn 'it-value ) 'tv-sec ) val-secs
(slot (slot itvn 'it-value ) 'tv-usec) val-usec)
- (syscall* ("setitimer" int (* (struct timeval))(* (struct timeval)))
+ (syscall* ("sb_setitimer" int (* (struct timeval))(* (struct timeval)))
(values t
(slot (slot itvo 'it-interval) 'tv-sec)
(slot (slot itvo 'it-interval) 'tv-usec)
;;; enough of them all in one place here that they should probably be
;;; removed by hand.
\f
-;;;; support routines for dealing with Unix pathnames
+(defconstant micro-seconds-per-internal-time-unit
+ (/ 1000000 sb!xc:internal-time-units-per-second))
-(defun unix-file-kind (name &optional check-for-links)
- #!+sb-doc
- "Return either :FILE, :DIRECTORY, :LINK, :SPECIAL, or NIL."
- (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)
- (ignore dev ino))
- (when res
- (let ((kind (logand mode s-ifmt)))
- (cond ((eql kind s-ifdir) :directory)
- ((eql kind s-ifreg) :file)
- #!-win32
- ((eql kind s-iflnk) :link)
- (t :special))))))
-
-;;; Is the Unix pathname PATHNAME relative, instead of absolute? (E.g.
-;;; "passwd" or "etc/passwd" instead of "/etc/passwd"?)
-(defun relative-unix-pathname? (pathname)
- (declare (type simple-string pathname))
- (or (zerop (length pathname))
- (char/= (schar pathname 0) #\/)))
-
-;;; Return PATHNAME with all symbolic links resolved. PATHNAME should
-;;; already be a complete absolute Unix pathname, since at least in
-;;; sbcl-0.6.12.36 we're called only from TRUENAME, and only after
-;;; 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-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...)
- #!+win32 (return-from unix-resolve-links pathname)
- (aver (not (relative-unix-pathname? 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 (> 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
- (/noshow pathname previous-pathnames)
- (let ((link (unix-readlink pathname)))
- (/noshow link)
- ;; Unlike the old CMU CL code, we handle a broken symlink by
- ;; returning the link itself. That way, CL:TRUENAME on a
- ;; broken link returns the link itself, so that CL:DIRECTORY
- ;; can return broken links, so that even without
- ;; Unix-specific extensions to do interesting things with
- ;; them, at least Lisp programs can see them and, if
- ;; necessary, delete them. (This is handy e.g. when your
- ;; managed-by-Lisp directories are visited by Emacs, which
- ;; creates broken links as notes to itself.)
- (if (null link)
- (return pathname)
- (let ((new-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 'string dir link))
- link))))
- (if (unix-file-kind new-pathname)
- (setf pathname new-pathname)
- (return pathname)))))
- ;; To generalize the principle that even if portable Lisp code
- ;; can't do anything interesting with a broken symlink, at
- ;; least it should be able to see and delete it, when we
- ;; detect a cyclic link, we return the link itself. (So even
- ;; though portable Lisp code can't do anything interesting
- ;; with a cyclic link, at least it can see it and delete it.)
- (if (member pathname previous-pathnames :test #'string=)
- (return pathname)
- (push pathname previous-pathnames))))
-\f
;;; UNIX specific code, that has been cleanly separated from the
;;; Windows build.
#!-win32
(progn
- (defconstant micro-seconds-per-internal-time-unit
- (/ 1000000 sb!xc:internal-time-units-per-second))
-
- (declaim (inline system-internal-real-time system-internal-run-time))
- (defun system-internal-real-time ()
- (multiple-value-bind (ignore seconds useconds) (unix-gettimeofday)
- (declare (ignore ignore) (type (unsigned-byte 32) seconds useconds))
- (let ((uint (truncate useconds
- micro-seconds-per-internal-time-unit)))
- (declare (type (unsigned-byte 32) uint))
- (+ (* seconds sb!xc:internal-time-units-per-second)
- uint))))
+
+ #!-sb-fluid (declaim (inline get-time-of-day))
+ (defun get-time-of-day ()
+ "Return the number of seconds and microseconds since the beginning of
+the UNIX epoch (January 1st 1970.)"
+ #!+(or darwin netbsd)
+ (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. NS notes: Darwin
+ ;; manpage says the timezone is not used anymore in their implementation
+ ;; at all.
+ (syscall* ("sb_gettimeofday" (* (struct timeval))
+ (* (struct timezone)))
+ (values (slot tv 'tv-sec)
+ (slot tv 'tv-usec))
+ (addr tv)
+ nil))
+ #!-(or darwin netbsd)
+ (with-alien ((tv (struct timeval))
+ (tz (struct timezone)))
+ (syscall* ("sb_gettimeofday" (* (struct timeval))
+ (* (struct timezone)))
+ (values (slot tv 'tv-sec)
+ (slot tv 'tv-usec))
+ (addr tv)
+ (addr tz))))
+
+ (declaim (inline system-internal-run-time
+ system-real-time-values))
+
+ (defun system-real-time-values ()
+ (multiple-value-bind (sec usec) (get-time-of-day)
+ (declare (type unsigned-byte sec) (type (unsigned-byte 31) 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 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
+ ;;
+ ;; I believe this is almost correct with x86/x86-64 cache
+ ;; coherency, but if the new value of C-SEC, C-MSEC can become
+ ;; visible to another CPU without NOW doing the same then it's
+ ;; unsafe. It's `almost' correct on x86 because writes by other
+ ;; processors may become visible in any order provided transitity
+ ;; holds. With at least three cpus, C-MSEC and C-SEC may be from
+ ;; different threads and an incorrect value may be returned.
+ ;; Considering that this failure is not detectable by the caller -
+ ;; it looks like time passes a bit slowly - and that it should be
+ ;; an extremely rare occurance I'm inclinded to leave it as it is.
+ ;; --MG
+ (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)
+ (type unsigned-byte 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))
+ (type fixnum utime-usec stime-usec))
(let ((result (+ (* (+ utime-sec stime-sec)
sb!xc:internal-time-units-per-second)
(floor (+ utime-usec
micro-seconds-per-internal-time-unit))))
result))))
\f
+;;; FIXME, KLUDGE: GET-TIME-OF-DAY used to be UNIX-GETTIMEOFDAY, and had a
+;;; primary return value indicating sucess, and also returned timezone
+;;; information -- though the timezone data was not there on Darwin.
+;;; Now we have GET-TIME-OF-DAY, but it turns out that despite SB-UNIX being
+;;; an implementation package UNIX-GETTIMEOFDAY has users in the wild.
+;;; So we're stuck with it for a while -- maybe delete it towards the end
+;;; of 2009.
+(defun unix-gettimeofday ()
+ (multiple-value-bind (sec usec) (get-time-of-day)
+ (values t sec usec nil nil)))
+\f
+;;;; opendir, readdir, closedir, and dirent-name
+
+(declaim (inline unix-opendir))
+(defun unix-opendir (namestring &optional (errorp t))
+ (let ((dir (alien-funcall
+ (extern-alien "sb_opendir"
+ (function system-area-pointer c-string))
+ namestring)))
+ (if (zerop (sap-int dir))
+ (when errorp (simple-perror
+ (format nil "Error opening directory ~S"
+ namestring)))
+ dir)))
+
+(declaim (inline unix-readdir))
+(defun unix-readdir (dir &optional (errorp t) namestring)
+ (let ((ent (alien-funcall
+ (extern-alien "sb_readdir"
+ (function system-area-pointer system-area-pointer))
+ dir)))
+ (if (zerop (sap-int ent))
+ (when errorp (simple-perror
+ (format nil "Error reading directory entry~@[ from ~S~]"
+ namestring)))
+ ent)))
+
+(declaim (inline unix-closedir))
+(defun unix-closedir (dir &optional (errorp t) namestring)
+ (let ((r (alien-funcall
+ (extern-alien "sb_closedir" (function int system-area-pointer))
+ dir)))
+ (if (minusp r)
+ (when errorp (simple-perror
+ (format nil "Error closing directory~@[ ~S~]"
+ namestring)))
+ r)))
+
+(declaim (inline unix-dirent-name))
+(defun unix-dirent-name (ent)
+ (alien-funcall
+ (extern-alien "sb_dirent_name" (function c-string system-area-pointer))
+ ent))
+\f
;;;; A magic constant for wait3().
;;;;
;;;; FIXME: This used to be defined in run-program.lisp as
;;;; 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)
- (let ((word (gensym))
- (bit (gensym)))
- `(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)
- (let ((word (gensym))
- (bit (gensym)))
- `(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)
- (let ((word (gensym))
- (bit (gensym)))
- `(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