Insert libio rewrite and its various changes from devo.

From-SVN: r15129

1 files changed, 56 insertions, 43 deletions

diff --git a/libio/iofdopen.c b/libio/iofdopen.c
index f8bc768..841e703 100644
--- a/libio/iofdopen.c
+++ b/libio/iofdopen.c
@@ -1,26 +1,27 @@
-/* 
-Copyright (C) 1993, 1994 Free Software Foundation
-
-This file is part of the GNU IO Library.  This library is free
-software; you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this library; see the file COPYING.  If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-
-As a special exception, if you link this library with files
-compiled with a GNU compiler to produce an executable, this does not cause
-the resulting executable to be covered by the GNU General Public License.
-This exception does not however invalidate any other reasons why
-the executable file might be covered by the GNU General Public License. */
+/* Copyright (C) 1993, 1994, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU IO Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This library is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this library; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.
+
+   As a special exception, if you link this library with files
+   compiled with a GNU compiler to produce an executable, this does
+   not cause the resulting executable to be covered by the GNU General
+   Public License.  This exception does not however invalidate any
+   other reasons why the executable file might be covered by the GNU
+   General Public License.  */
 
 #ifdef __STDC__
 #include <stdlib.h>
@@ -33,12 +34,19 @@ the executable file might be covered by the GNU General Public License. */
 #endif
 
 _IO_FILE *
-DEFUN(_IO_fdopen, (fd, mode),
-      int fd AND const char *mode)
+_IO_fdopen (fd, mode)
+     int fd;
+     const char *mode;
 {
   int read_write;
   int posix_mode = 0;
-  struct _IO_FILE_plus *fp;
+  struct locked_FILE
+  {
+    struct _IO_FILE_plus fp;
+#ifdef _IO_MTSAFE_IO
+    _IO_lock_t lock;
+#endif
+  } *new_f;
   int fd_flags;
 
   switch (*mode++)
@@ -54,9 +62,7 @@ DEFUN(_IO_fdopen, (fd, mode),
       read_write = _IO_NO_READS|_IO_IS_APPENDING;
       break;
     default:
-#ifdef EINVAL
-      errno = EINVAL;
-#endif
+      MAYBE_SET_EINVAL;
       return NULL;
   }
   if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+'))
@@ -96,26 +102,33 @@ DEFUN(_IO_fdopen, (fd, mode),
     }
 #endif
 
-  fp = (struct _IO_FILE_plus*)malloc(sizeof(struct _IO_FILE_plus));
-  if (fp == NULL)
+  new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
+  if (new_f == NULL)
     return NULL;
-  _IO_init(&fp->file, 0);
-  _IO_JUMPS(&fp->file) = &_IO_file_jumps;
-  _IO_file_init(&fp->file);
+#ifdef _IO_MTSAFE_IO
+  new_f->fp.file._lock = &new_f->lock;
+#endif
+  _IO_init (&new_f->fp.file, 0);
+  _IO_JUMPS (&new_f->fp.file) = &_IO_file_jumps;
+  _IO_file_init (&new_f->fp.file);
 #if  !_IO_UNIFIED_JUMPTABLES
-  fp->vtable = NULL;
+  new_f->fp.vtable = NULL;
 #endif
-  if (_IO_file_attach(&fp->file, fd) == NULL)
+  if (_IO_file_attach (&new_f->fp.file, fd) == NULL)
     {
-      _IO_un_link(&fp->file);
-      free (fp);
+      _IO_un_link (&new_f->fp.file);
+      free (new_f);
       return NULL;
     }
-  fp->file._flags &= ~_IO_DELETE_DONT_CLOSE;
+  new_f->fp.file._flags &= ~_IO_DELETE_DONT_CLOSE;
 
-  fp->file._IO_file_flags = 
-    _IO_mask_flags(&fp->file, read_write,
-		   _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
+  new_f->fp.file._IO_file_flags =
+    _IO_mask_flags (&new_f->fp.file, read_write,
+		    _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
 
-  return (_IO_FILE*)fp;
+  return (_IO_FILE *) &new_f->fp;
 }
+
+#ifdef weak_alias
+weak_alias (_IO_fdopen, fdopen)
+#endif