1.0.34.5: remove dead DATA-VECTOR-{REF,SET} transforms

[sbcl.git] / contrib / sb-posix / interface.lisp

diff --git a/contrib/sb-posix/interface.lisp b/contrib/sb-posix/interface.lisp
index 1da9d8f..c01f031 100644 (file)
--- a/contrib/sb-posix/interface.lisp
+++ b/contrib/sb-posix/interface.lisp
@@ -281,10 +281,16 @@
     (define-call "setup_mach_exceptions" void never-fails)
     (define-call ("posix_fork" :c-name "fork") pid-t minusp)
     (defun fork ()
-      (let ((pid (posix-fork)))
-        (when (= pid 0)
-          (setup-mach-exceptions))
-        pid))
+      (tagbody
+         (sb-thread::with-all-threads-lock
+           (when (cdr sb-thread::*all-threads*)
+             (go :error))
+           (let ((pid (posix-fork)))
+             (when (= pid 0)
+               (setup-mach-exceptions))
+             (return-from fork pid)))
+       :error
+         (error "Cannot fork with multiple threads running.")))
     (export 'fork :sb-posix))
 
   #-mach-exception-handler
@@ -615,6 +621,11 @@
          (syscall-error))
        (setf termios (alien-to-termios a-termios termios))))
    termios)
+ (define-call "tcdrain" int minusp (fd file-descriptor))
+ (define-call "tcflow" int minusp (fd file-descriptor) (action int))
+ (define-call "tcflush" int minusp (fd file-descriptor) (queue-selector int))
+ (define-call "tcgetsid" pid-t minusp (fd file-descriptor))
+ (define-call "tcsendbreak" int minusp (fd file-descriptor) (duration int))
  (export 'cfsetispeed :sb-posix)
  (declaim (inline cfsetispeed))
  (defun cfsetispeed (speed &optional termios)
@@ -717,7 +728,10 @@
 
 ;;; environment
 
-(export 'getenv :sb-posix)
+(eval-when (:compile-toplevel :load-toplevel)
+  ;; Do this at compile-time as Win32 code below refers to it as
+  ;; sb-posix:getenv.
+  (export 'getenv :sb-posix))
 (defun getenv (name)
   (let ((r (alien-funcall
             (extern-alien "getenv" (function (* char) c-string))
@@ -725,7 +739,40 @@
     (declare (type (alien (* char)) r))
     (unless (null-alien r)
       (cast r c-string))))
-(define-call "putenv" int minusp (string c-string))
+#-win32
+(progn
+  (define-call "setenv" int minusp (name c-string) (value c-string) (overwrite int))
+  (define-call "unsetenv" int minusp (name c-string))
+  (export 'putenv :sb-posix)
+  (defun putenv (string)
+    (declare (string string))
+    ;; We don't want to call actual putenv: the string passed to putenv ends
+    ;; up in environ, and we any string we allocate GC might move.
+    ;;
+    ;; This makes our wrapper nonconformant if you squit hard enough, but
+    ;; users who care about that should really be calling putenv() directly in
+    ;; order to be able to manage memory sanely.
+    (let ((p (position #\= string))
+          (n (length string)))
+      (if p
+          (if (= p n)
+              (unsetenv (subseq string 0 p))
+              (setenv (subseq string 0 p) (subseq string (1+ p)) 1))
+          (error "Invalid argument to putenv: ~S" string)))))
+#+win32
+(progn
+  ;; Windows doesn't define a POSIX setenv, but happily their _putenv is sane.
+  (define-call* "putenv" int minusp (string c-string))
+  (export 'setenv :sb-posix)
+  (defun setenv (name value overwrite)
+    (declare (string name value))
+    (if (and (zerop overwrite) (sb-posix:getenv name))
+        0
+        (putenv (concatenate 'string name "=" value))))
+  (export 'unsetenv :sb-posix)
+  (defun unsetenv (name)
+    (declare (string name))
+    (putenv (concatenate 'string name "="))))
 
 ;;; syslog
 #-win32