1 /* Copyright (C) 1993,1997,1998,1999,2000,2002,2003,2012
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>.
19 As a special exception, if you link the code in this file with
20 files compiled with a GNU compiler to produce an executable,
21 that does not cause the resulting executable to be covered by
22 the GNU Lesser General Public License. This exception does not
23 however invalidate any other reasons why the executable file
24 might be covered by the GNU Lesser General Public License.
25 This exception applies to code released by its copyright holders
26 in files containing the exception. */
32 # include <shlib-compat.h>
34 # define _IO_new_fopen fopen
38 __fopen_maybe_mmap (fp)
42 if ((fp->_flags2 & _IO_FLAGS2_MMAP) && (fp->_flags & _IO_NO_WRITES))
44 /* Since this is read-only, we might be able to mmap the contents
45 directly. We delay the decision until the first read attempt by
46 giving it a jump table containing functions that choose mmap or
47 vanilla file operations and reset the jump table accordingly. */
50 _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_maybe_mmap;
52 _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps_maybe_mmap;
53 fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_maybe_mmap;
61 __fopen_internal (filename, mode, is32)
68 struct _IO_FILE_plus fp;
72 struct _IO_wide_data wd;
73 } *new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
78 new_f->fp.file._lock = &new_f->lock;
80 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
81 _IO_no_init (&new_f->fp.file, 0, 0, &new_f->wd, &_IO_wfile_jumps);
83 _IO_no_init (&new_f->fp.file, 1, 0, NULL, NULL);
85 _IO_JUMPS (&new_f->fp) = &_IO_file_jumps;
86 INTUSE(_IO_file_init) (&new_f->fp);
87 #if !_IO_UNIFIED_JUMPTABLES
88 new_f->fp.vtable = NULL;
90 if (INTUSE(_IO_file_fopen) ((_IO_FILE *) new_f, filename, mode, is32)
92 return __fopen_maybe_mmap (&new_f->fp.file);
94 INTUSE(_IO_un_link) (&new_f->fp);
100 _IO_new_fopen (filename, mode)
101 const char *filename;
104 return __fopen_internal (filename, mode, 1);
108 strong_alias (_IO_new_fopen, __new_fopen)
109 versioned_symbol (libc, _IO_new_fopen, _IO_fopen, GLIBC_2_1);
110 versioned_symbol (libc, __new_fopen, fopen, GLIBC_2_1);