X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Funix.lisp;h=115277ad50e7a0c8d7cf072b18c57fea000d4e4a;hb=b67c2d7522c0b73a18e316faa2b81d7c8b187706;hp=39b23eb04df46b1ff6ef8a1ff506d0f2010e4f7c;hpb=c3334d2307b721cfcea29e6abcd33e48487fb1ea;p=sbcl.git diff --git a/src/code/unix.lisp b/src/code/unix.lisp index 39b23eb..115277a 100644 --- a/src/code/unix.lisp +++ b/src/code/unix.lisp @@ -27,12 +27,6 @@ (/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) @@ -41,14 +35,14 @@ (dotimes (i most-positive-fixnum (error "argh! can't happen")) (declare (type index i)) (let ((c-string (deref c-strings i))) - (if c-string + (if c-string (push c-string reversed-result) - (return (nreverse reversed-result))))))) + (return (nreverse reversed-result))))))) ;;;; Lisp types used by syscalls -(deftype unix-pathname () 'simple-base-string) -(deftype unix-fd () `(integer 0 ,most-positive-fixnum)) +(deftype unix-pathname () 'simple-string) +(deftype unix-fd () `(integer 0 ,sb!xc:most-positive-fixnum)) (deftype unix-file-mode () '(unsigned-byte 32)) (deftype unix-pid () '(unsigned-byte 32)) @@ -62,15 +56,19 @@ ;;; 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) `(locally (declare (optimize (sb!c::float-accuracy 0))) (let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types)) - ,@args))) + ,@args))) (if (minusp result) - (values nil (get-errno)) - ,success-form)))) + (values nil (get-errno)) + ,success-form)))) ;;; This is like SYSCALL, but if it fails, signal an error instead of ;;; returning error codes. Should only be used for syscalls that will @@ -79,33 +77,52 @@ `(locally (declare (optimize (sb!c::float-accuracy 0))) (let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types)) - ,@args))) + ,@args))) (if (minusp result) - (error "Syscall ~A failed: ~A" ,name (strerror)) - ,success-form)))) + (error "Syscall ~A failed: ~A" ,name (strerror)) + ,success-form)))) + +(defmacro int-syscall ((name &rest arg-types) &rest args) + `(syscall (,name ,@arg-types) (values result 0) ,@args)) -(/show0 "unix.lisp 109") +(defmacro with-restarted-syscall ((&optional (value (gensym)) + (errno (gensym))) + syscall-form &rest body) + #!+sb-doc + "Evaluate BODY with VALUE and ERRNO bound to the return values of +SYSCALL-FORM. Repeat evaluation of SYSCALL-FORM if it is interrupted." + `(let (,value ,errno) + (loop (multiple-value-setq (,value ,errno) + ,syscall-form) + (unless #!-win32 (eql ,errno sb!unix:eintr) #!+win32 nil + (return (values ,value ,errno)))) + ,@body)) (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)) +#!+win32 +(progn + (defconstant espipe 29)) ;;;; 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))) ;;; from stdio.h ;;; 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)) + (void-syscall ("rename" (c-string :not-null t) + (c-string :not-null t)) + name1 name2)) ;;; from sys/types.h and gnu/types.h @@ -118,20 +135,17 @@ ;;; layer. (define-alien-type fd-mask unsigned-long) -(eval-when (:compile-toplevel :load-toplevel :execute) - (defconstant fd-setsize 1024)) - (define-alien-type nil (struct fd-set - (fds-bits (array fd-mask #.(/ fd-setsize - sb!vm:n-machine-word-bits))))) + (fds-bits (array fd-mask #.(/ fd-setsize + sb!vm:n-machine-word-bits))))) (/show0 "unix.lisp 304") ;;;; fcntl.h ;;;; -;;;; POSIX Standard: 6.5 File Control Operations +;;;; POSIX Standard: 6.5 File Control Operations ;;; Open the file whose pathname is specified by PATH for reading ;;; and/or writing as specified by the FLAGS argument. Various FLAGS @@ -142,9 +156,15 @@ ;;; file descriptor is returned by UNIX-OPEN. (defun unix-open (path flags mode) (declare (type unix-pathname path) - (type fixnum flags) - (type unix-file-mode mode)) - (int-syscall ("open" c-string int int) path flags mode)) + (type fixnum flags) + (type unix-file-mode mode)) + (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. @@ -153,14 +173,55 @@ (declare (type unix-fd fd)) (void-syscall ("close" int) fd)) +;;;; 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 fd (octets-to-string template-buffer))))))) + ;;;; timebits.h ;; 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. +#!-(or win32 openbsd netbsd) (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 + +;; The above definition doesn't work on 64-bit OpenBSD platforms. +;; Both tv_sec and tv_usec are declared as long instead of time_t, and +;; time_t is a typedef for int. +#!+(or openbsd netbsd) +(define-alien-type nil + (struct timeval + (tv-sec long) ; seconds + (tv-usec long))) ; and microseconds + +#!+win32 +(define-alien-type nil + (struct timeval + (tv-sec time-t) ; seconds + (tv-usec long))) ; and microseconds ;;;; resourcebits.h @@ -170,22 +231,22 @@ (define-alien-type nil (struct rusage - (ru-utime (struct timeval)) ; user time used - (ru-stime (struct timeval)) ; system time used. - (ru-maxrss long) ; maximum resident set size (in kilobytes) - (ru-ixrss long) ; integral shared memory size - (ru-idrss long) ; integral unshared data size - (ru-isrss long) ; integral unshared stack size - (ru-minflt long) ; page reclaims - (ru-majflt long) ; page faults - (ru-nswap long) ; swaps - (ru-inblock long) ; block input operations - (ru-oublock long) ; block output operations - (ru-msgsnd long) ; messages sent - (ru-msgrcv long) ; messages received - (ru-nsignals long) ; signals received - (ru-nvcsw long) ; voluntary context switches - (ru-nivcsw long))) ; involuntary context switches + (ru-utime (struct timeval)) ; user time used + (ru-stime (struct timeval)) ; system time used. + (ru-maxrss long) ; maximum resident set size (in kilobytes) + (ru-ixrss long) ; integral shared memory size + (ru-idrss long) ; integral unshared data size + (ru-isrss long) ; integral unshared stack size + (ru-minflt long) ; page reclaims + (ru-majflt long) ; page faults + (ru-nswap long) ; swaps + (ru-inblock long) ; block input operations + (ru-oublock long) ; block output operations + (ru-msgsnd long) ; messages sent + (ru-msgrcv long) ; messages received + (ru-nsignals long) ; signals received + (ru-nvcsw long) ; voluntary context switches + (ru-nivcsw long))) ; involuntary context switches ;;;; unistd.h @@ -193,15 +254,25 @@ ;;; return T if the file is accessible with that mode and NIL if not. ;;; When NIL, also return an errno value with NIL which tells why the ;;; file was not accessible. -;;; +;;; ;;; The access modes are: ;;; r_ok Read permission. ;;; w_ok Write permission. ;;; x_ok Execute permission. ;;; f_ok Presence of file. + +;;; 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)) + (type (mod 8) mode)) (void-syscall ("access" c-string int) path mode)) ;;; values for the second argument to UNIX-LSEEK @@ -215,7 +286,7 @@ (int-syscall ("isatty" int) fd)) (defun unix-lseek (fd offset whence) - "Unix-lseek accepts a file descriptor and moves the file pointer by + "Unix-lseek accepts a file descriptor and moves the file pointer by OFFSET octets. Whence can be any of the following: L_SET Set the file pointer. @@ -223,21 +294,26 @@ L_XTND Extend the file size. " (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 ) - (values nil (get-errno)) + (type (integer 0 2) whence)) + (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)) (values result 0)))) ;;; UNIX-READ accepts a file descriptor, a buffer, and the length to read. ;;; 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)) - + (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 @@ -246,32 +322,52 @@ ;;; the actual number of bytes written. (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)) + (type (unsigned-byte 32) 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 ;;; value is the pipe to be read from and the second is can be written ;;; to. If an error occurred the first value is NIL and the second the ;;; unix error code. +#!-win32 (defun unix-pipe () (with-alien ((fds (array int 2))) (syscall ("pipe" (* int)) - (values (deref fds 0) (deref fds 1)) - (cast fds (* 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)) - (void-syscall ("mkdir" c-string int) name mode)) + (type unix-file-mode mode) + #!+win32 (ignore mode)) + (void-syscall ("mkdir" c-string #!-win32 int) name #!-win32 mode)) ;;; Given a C char* pointer allocated by malloc(), free it and return a ;;; corresponding Lisp string (or return NIL if the pointer is a C NULL). @@ -280,11 +376,12 @@ (if (null-alien newcharstar) nil (prog1 - (cast newcharstar c-string) - (free-alien newcharstar)))) + (cast newcharstar c-string) + (free-alien newcharstar)))) ;;; Return the Unix current directory as a SIMPLE-STRING, in the -;;; style returned by getcwd() (no trailing slash character). +;;; 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 @@ -298,15 +395,20 @@ ;; a constant. Going the grovel_headers route doesn't seem to be ;; helpful, either, as Solaris doesn't export PATH_MAX from ;; unistd.h. - #!-(or linux openbsd freebsd netbsd sunos osf1 darwin) (,stub,) - #!+(or linux openbsd freebsd netbsd sunos osf1 darwin) + ;; + ;; 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 hpux win32) (,stub,) + #!+(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) 0 - #!+(or sunos osf1) 1025)) + (function (* char) + (* char) + size-t)) + nil + #!+(or linux openbsd freebsd netbsd darwin win32) 0 + #!+(or sunos osf1 hpux) 1025)) (simple-perror "getcwd"))) ;;; Return the Unix current directory as a SIMPLE-STRING terminated @@ -314,22 +416,6 @@ (defun posix-getcwd/ () (concatenate 'string (posix-getcwd) "/")) -;;; Convert at the UNIX level from a possibly relative filename to -;;; an absolute filename. -;;; -;;; FIXME: Do we still need this even as we switch to -;;; *DEFAULT-PATHNAME-DEFAULTS*? I think maybe we do, since it seems -;;; to be valid for the user to set *DEFAULT-PATHNAME-DEFAULTS* to -;;; have a NIL directory component, and then this'd be the only way to -;;; interpret a relative directory specification. But I don't find the -;;; ANSI pathname documentation to be a model of clarity. Maybe -;;; someone who understands it better can take a look at this.. -- WHN -(defun unix-maybe-prepend-current-directory (name) - (declare (simple-string name)) - (if (and (> (length name) 0) (char= (schar name 0) #\/)) - name - (concatenate 'simple-string (posix-getcwd/) name))) - ;;; 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. @@ -348,53 +434,86 @@ (define-alien-routine ("getpid" unix-getpid) int) ;;; Return the real user id associated with the current process. +#!-win32 (define-alien-routine ("getuid" unix-getuid) int) ;;; Translate a user id into a login name. +#!-win32 (defun uid-username (uid) (or (newcharstar-string (alien-funcall (extern-alien "uid_username" - (function (* char) int)) - uid)) + (function (* char) int)) + uid)) (error "found no match for Unix uid=~S" uid))) ;;; Return the namestring of the home directory, being careful to ;;; include a trailing #\/ -(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))) +#!-win32 +(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 ;;; failure. +#!-win32 +(defun unix-readlink (path) + (declare (type unix-pathname path)) + (with-alien ((ptr (* char) + (alien-funcall (extern-alien + "wrapped_readlink" + (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))))) +#!+win32 +;; Win32 doesn't do links, but something likes to call this anyway. +;; Something in this file, no less. But it only takes one result, so... (defun unix-readlink (path) + (declare (ignore path)) + nil) + +(defun unix-realpath (path) (declare (type unix-pathname path)) (with-alien ((ptr (* char) - (alien-funcall (extern-alien - "wrapped_readlink" - (function (* char) c-string)) - path))) + (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))))) + (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. +;;; 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)) ;;; Return the name of the host machine as a string. +#!-win32 (defun unix-gethostname () (with-alien ((buf (array char 256))) (syscall ("gethostname" (* char) int) - (cast buf c-string) - (cast buf (* char)) 256))) + (cast buf c-string) + (cast buf (* char)) 256))) +#!-win32 (defun unix-setsid () (int-syscall ("setsid"))) @@ -403,9 +522,10 @@ ;;; UNIX-IOCTL performs a variety of operations on open i/o ;;; descriptors. See the UNIX Programmer's Manual for more ;;; information. +#!-win32 (defun unix-ioctl (fd cmd arg) (declare (type unix-fd fd) - (type (signed-byte 32) cmd)) + (type (signed-byte 32) cmd)) (void-syscall ("ioctl" int int (* char)) fd cmd arg)) ;;;; sys/resource.h @@ -416,130 +536,258 @@ ;;; user time, and returns the seconds and microseconds as separate ;;; values. #!-sb-fluid (declaim (inline unix-fast-getrusage)) +#!-win32 (defun unix-fast-getrusage (who) (declare (values (member t) - (unsigned-byte 31) (integer 0 1000000) - (unsigned-byte 31) (integer 0 1000000))) + (unsigned-byte 31) (integer 0 1000000) + (unsigned-byte 31) (integer 0 1000000))) (with-alien ((usage (struct rusage))) (syscall* ("getrusage" int (* (struct rusage))) - (values t - (slot (slot usage 'ru-utime) 'tv-sec) - (slot (slot usage 'ru-utime) 'tv-usec) - (slot (slot usage 'ru-stime) 'tv-sec) - (slot (slot usage 'ru-stime) 'tv-usec)) - who (addr usage)))) + (values t + (slot (slot usage 'ru-utime) 'tv-sec) + (slot (slot usage 'ru-utime) 'tv-usec) + (slot (slot usage 'ru-stime) 'tv-sec) + (slot (slot usage 'ru-stime) 'tv-usec)) + who (addr usage)))) ;;; Return information about the resource usage of the process ;;; specified by WHO. WHO can be either the current process ;;; (rusage_self) or all of the terminated child processes ;;; (rusage_children). NIL and an error number is returned if the call ;;; fails. +#!-win32 (defun unix-getrusage (who) (with-alien ((usage (struct rusage))) (syscall ("getrusage" int (* (struct rusage))) - (values t - (+ (* (slot (slot usage 'ru-utime) 'tv-sec) 1000000) - (slot (slot usage 'ru-utime) 'tv-usec)) - (+ (* (slot (slot usage 'ru-stime) 'tv-sec) 1000000) - (slot (slot usage 'ru-stime) 'tv-usec)) - (slot usage 'ru-maxrss) - (slot usage 'ru-ixrss) - (slot usage 'ru-idrss) - (slot usage 'ru-isrss) - (slot usage 'ru-minflt) - (slot usage 'ru-majflt) - (slot usage 'ru-nswap) - (slot usage 'ru-inblock) - (slot usage 'ru-oublock) - (slot usage 'ru-msgsnd) - (slot usage 'ru-msgrcv) - (slot usage 'ru-nsignals) - (slot usage 'ru-nvcsw) - (slot usage 'ru-nivcsw)) - who (addr usage)))) + (values t + (+ (* (slot (slot usage 'ru-utime) 'tv-sec) 1000000) + (slot (slot usage 'ru-utime) 'tv-usec)) + (+ (* (slot (slot usage 'ru-stime) 'tv-sec) 1000000) + (slot (slot usage 'ru-stime) 'tv-usec)) + (slot usage 'ru-maxrss) + (slot usage 'ru-ixrss) + (slot usage 'ru-idrss) + (slot usage 'ru-isrss) + (slot usage 'ru-minflt) + (slot usage 'ru-majflt) + (slot usage 'ru-nswap) + (slot usage 'ru-inblock) + (slot usage 'ru-oublock) + (slot usage 'ru-msgsnd) + (slot usage 'ru-msgrcv) + (slot usage 'ru-nsignals) + (slot usage 'ru-nvcsw) + (slot usage 'ru-nivcsw)) + who (addr usage)))) + +(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)) + +;;;; 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)))))))) ;;;; 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- num-descriptors))))) + (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) - (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))))) + read-fds write-fds exception-fds + 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 timeout-usecs)) + (with-fd-setsize (num-descriptors) + (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-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))) + (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)))))) + ,@(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)))))) + sb!vm:n-machine-word-bits) + collect `(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) - (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)))))) + (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-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 ("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. 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))))))) ;;;; sys/stat.h @@ -552,24 +800,28 @@ ;;; synthesize a nice consistent structure for us. ;;; ;;; Note that st-dev is a long, not a dev-t. This is because dev-t on -;;; linux 32 bit archs is a 64 bit quantity, but alien doesn's support +;;; linux 32 bit archs is a 64 bit quantity, but alien doesn't support ;;; those. We don't actually access that field anywhere, though, so ;;; until we can get 64 bit alien support it'll do. Also note that ;;; 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 - (st-dev unsigned-int) ; would be dev-t in a real stat + (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) - (st-rdev unsigned-int) ; would be dev-t in a real stat - (st-size unsigned-int) ; would be off-t in a real stat - (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))) @@ -590,19 +842,19 @@ (defun %extract-stat-results (wrapped-stat) (declare (type (alien (* (struct wrapped_stat))) wrapped-stat)) (values t - (slot wrapped-stat 'st-dev) - (slot wrapped-stat 'st-ino) - (slot wrapped-stat 'st-mode) - (slot wrapped-stat 'st-nlink) - (slot wrapped-stat 'st-uid) - (slot wrapped-stat 'st-gid) - (slot wrapped-stat 'st-rdev) - (slot wrapped-stat 'st-size) - (slot wrapped-stat 'st-atime) - (slot wrapped-stat 'st-mtime) - (slot wrapped-stat 'st-ctime) - (slot wrapped-stat 'st-blksize) - (slot wrapped-stat 'st-blocks))) + (slot wrapped-stat 'st-dev) + (slot wrapped-stat 'st-ino) + (slot wrapped-stat 'st-mode) + (slot wrapped-stat 'st-nlink) + (slot wrapped-stat 'st-uid) + (slot wrapped-stat 'st-gid) + (slot wrapped-stat 'st-rdev) + (slot wrapped-stat 'st-size) + (slot wrapped-stat 'st-atime) + (slot wrapped-stat 'st-mtime) + (slot wrapped-stat 'st-ctime) + (slot wrapped-stat 'st-blksize) + (slot wrapped-stat 'st-blocks))) ;;; Unix system calls in the stat(2) family are handled by calls to ;;; C-level wrapper functions which copy all the raw "struct stat" @@ -614,50 +866,119 @@ (declare (type unix-pathname name)) (with-alien ((buf (struct wrapped_stat))) (syscall ("stat_wrapper" c-string (* (struct wrapped_stat))) - (%extract-stat-results (addr buf)) - name (addr buf)))) + (%extract-stat-results (addr buf)) + name (addr buf)))) (defun unix-lstat (name) (declare (type unix-pathname name)) (with-alien ((buf (struct wrapped_stat))) (syscall ("lstat_wrapper" c-string (* (struct wrapped_stat))) - (%extract-stat-results (addr buf)) - name (addr buf)))) + (%extract-stat-results (addr buf)) + name (addr buf)))) (defun unix-fstat (fd) (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)))) + (%extract-stat-results (addr buf)) + fd (addr buf)))) + +(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)))) ;;;; time.h ;; the POSIX.4 structure for a time value. This is like a "struct ;; timeval" but has nanoseconds instead of microseconds. +#!-(or openbsd netbsd) +(define-alien-type nil + (struct timespec + (tv-sec long) ; seconds + (tv-nsec long))) ; nanoseconds + +;; Just as with struct timeval, 64-bit OpenBSD has problems with the +;; above definition. tv_sec is declared as time_t instead of long, +;; and time_t is a typedef for int. +#!+(or openbsd netbsd) (define-alien-type nil (struct timespec - (tv-sec long) ; seconds - (tv-nsec long))) ; nanoseconds + (tv-sec time-t) ; seconds + (tv-nsec long))) ; nanoseconds ;; used by other time functions (define-alien-type nil (struct tm - (tm-sec int) ; Seconds. [0-60] (1 leap second) - (tm-min int) ; Minutes. [0-59] - (tm-hour int) ; Hours. [0-23] - (tm-mday int) ; Day. [1-31] - (tm-mon int) ; Month. [0-11] - (tm-year int) ; Year - 1900. - (tm-wday int) ; Day of week. [0-6] - (tm-yday int) ; Days in year. [0-365] - (tm-isdst int) ; DST. [-1/0/1] - (tm-gmtoff long) ; Seconds east of UTC. - (tm-zone c-string))) ; Timezone abbreviation. + (tm-sec int) ; Seconds. [0-60] (1 leap second) + (tm-min int) ; Minutes. [0-59] + (tm-hour int) ; Hours. [0-23] + (tm-mday int) ; Day. [1-31] + (tm-mon int) ; Month. [0-11] + (tm-year int) ; Year - 1900. + (tm-wday int) ; Day of week. [0-6] + (tm-yday int) ; Days in year. [0-365] + (tm-isdst int) ; DST. [-1/0/1] + (tm-gmtoff long) ; Seconds east of UTC. + (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)) +#!-win32 +(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 (and (eql sb!unix:eintr + (nth-value 1 + (int-syscall ("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))) + (setf secs rem-sec + nsecs rem-nsec) + t))) + do (rotatef req rem)))) + (defun unix-get-seconds-west (secs) (multiple-value-bind (ignore seconds dst) (get-timezone secs) (declare (ignore ignore) (ignore dst)) @@ -669,61 +990,45 @@ ;;; obsolete and should never be used. (define-alien-type nil (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)))) + (tz-minuteswest int) ; minutes west of Greenwich + (tz-dsttime int))) ; type of dst correction ;; Type of the second argument to `getitimer' and -;; the second and third arguments `setitimer'. +;; the second and third arguments `setitimer'. (define-alien-type nil (struct itimerval - (it-interval (struct timeval)) ; timer interval - (it-value (struct timeval)))) ; current value + (it-interval (struct timeval)) ; timer interval + (it-value (struct timeval)))) ; current value -(defconstant ITIMER-REAL 0) -(defconstant ITIMER-VIRTUAL 1) -(defconstant ITIMER-PROF 2) +(defconstant itimer-real 0) +(defconstant itimer-virtual 1) +(defconstant itimer-prof 2) -(defun unix-getitimer(which) +#!-win32 +(defun unix-getitimer (which) "Unix-getitimer returns the INTERVAL and VALUE slots of one of three system timers (:real :virtual or :profile). On success, unix-getitimer returns 5 values, 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))) + (values t + (unsigned-byte 29) (mod 1000000) + (unsigned-byte 29) (mod 1000000))) (let ((which (ecase which - (:real ITIMER-REAL) - (:virtual ITIMER-VIRTUAL) - (:profile ITIMER-PROF)))) + (:real itimer-real) + (:virtual itimer-virtual) + (:profile itimer-prof)))) (with-alien ((itv (struct itimerval))) (syscall* ("getitimer" int (* (struct itimerval))) - (values T - (slot (slot itv 'it-interval) 'tv-sec) - (slot (slot itv 'it-interval) 'tv-usec) - (slot (slot itv 'it-value) 'tv-sec) - (slot (slot itv 'it-value) 'tv-usec)) - which (alien-sap (addr itv)))))) - + (values t + (slot (slot itv 'it-interval) 'tv-sec) + (slot (slot itv 'it-interval) 'tv-usec) + (slot (slot itv 'it-value) 'tv-sec) + (slot (slot itv 'it-value) 'tv-usec)) + which (alien-sap (addr itv)))))) + +#!-win32 (defun unix-setitimer (which int-secs int-usec val-secs val-usec) " Unix-setitimer sets the INTERVAL and VALUE slots of one of three system timers (:real :virtual or :profile). A SIGALRM signal @@ -734,51 +1039,29 @@ 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 (integer 0 (1000000)) int-usec val-usec) - (values t - (unsigned-byte 29) (mod 1000000) - (unsigned-byte 29) (mod 1000000))) + (type (unsigned-byte 29) int-secs val-secs) + (type (integer 0 (1000000)) int-usec val-usec) + (values t + (unsigned-byte 29) (mod 1000000) + (unsigned-byte 29) (mod 1000000))) (let ((which (ecase which - (:real ITIMER-REAL) - (:virtual ITIMER-VIRTUAL) - (:profile ITIMER-PROF)))) + (:real itimer-real) + (:virtual itimer-virtual) + (:profile itimer-prof)))) (with-alien ((itvn (struct itimerval)) - (itvo (struct itimerval))) + (itvo (struct itimerval))) (setf (slot (slot itvn 'it-interval) 'tv-sec ) int-secs - (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) + (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))) - (values T - (slot (slot itvo 'it-interval) 'tv-sec) - (slot (slot itvo 'it-interval) 'tv-usec) - (slot (slot itvo 'it-value) 'tv-sec) - (slot (slot itvo 'it-value) 'tv-usec)) - which (alien-sap (addr itvn))(alien-sap (addr itvo)))))) - -(defmacro sb!ext:with-timeout (expires &body body) - "Execute the body, interrupting it with a SIGALRM after at least -EXPIRES seconds have passed. Uses Unix setitimer(), restoring any -previous timer after the body has finished executing" - (with-unique-names (saved-seconds saved-useconds s u) - `(let (- ,saved-seconds ,saved-useconds) - (multiple-value-setq (- - - ,saved-seconds ,saved-useconds) - (unix-getitimer :real)) - (multiple-value-bind (,s ,u) (floor ,expires) - (setf ,u (floor (* ,u 1000000))) - (if (and (> ,expires 0) - (or (and (zerop ,saved-seconds) (zerop ,saved-useconds)) - (> ,saved-seconds ,s) - (and (= ,saved-seconds ,s) - (> ,saved-useconds ,u)))) - (unwind-protect - (progn - (unix-setitimer :real 0 0 ,s ,u) - ,@body) - (unix-setitimer :real 0 0 ,saved-seconds ,saved-useconds)) - (progn - ,@body)))))) + (values t + (slot (slot itvo 'it-interval) 'tv-sec) + (slot (slot itvo 'it-interval) 'tv-usec) + (slot (slot itvo 'it-value) 'tv-sec) + (slot (slot itvo 'it-value) 'tv-usec)) + which (alien-sap (addr itvn))(alien-sap (addr itvo)))))) + ;;; FIXME: Many Unix error code definitions were deleted from the old ;;; CMU CL source code here, but not in the exports of SB-UNIX. I @@ -787,162 +1070,174 @@ previous timer after the body has finished executing" ;;; enough of them all in one place here that they should probably be ;;; removed by hand. -;;;; support routines for dealing with Unix pathnames - -(defun unix-file-kind (name &optional check-for-links) - #!+sb-doc - "Return either :FILE, :DIRECTORY, :LINK, :SPECIAL, or NIL." - (declare (simple-base-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) - ((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-base-string pathname)) - (aver (not (relative-unix-pathname? pathname))) - (/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 - (unix-simplify-pathname - (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)) - 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)))) - -(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 + + #!-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.)" + #!+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. NS notes: Darwin + ;; manpage says the timezone is not used anymore in their implementation + ;; at all. + (syscall* ("gettimeofday" (* (struct timeval)) + (* (struct timezone))) + (values (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)) + (* (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 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 + ;; + ;; 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) + ;; (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)))) + +;;; 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))) + +;;;; 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)) ;;;; A magic constant for wait3(). ;;;; @@ -953,47 +1248,3 @@ previous timer after the body has finished executing" ;;;; the headers that may or may not be the same thing. To be ;;;; investigated. -- CSR, 2002-03-25 (defconstant wstopped #o177) - - -;;;; 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)))) - -