diff options
Diffstat (limited to 'lib/unlocked-io.h')
| -rw-r--r-- | lib/unlocked-io.h | 66 |
1 files changed, 54 insertions, 12 deletions
diff --git a/lib/unlocked-io.h b/lib/unlocked-io.h index a7240fb9..36a7a488 100644 --- a/lib/unlocked-io.h +++ b/lib/unlocked-io.h @@ -1,21 +1,20 @@ /* Prefer faster, non-thread-safe stdio functions if available. - Copyright (C) 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc. - This program is free software; you can redistribute it and/or modify it - under the terms of the GNU Library General Public License as published - by the Free Software Foundation; either version 2, or (at your option) + This program 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 program 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 - Library General Public License for more details. + 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 Library General Public - License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, - USA. */ + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Written by Jim Meyering. */ @@ -28,63 +27,106 @@ # if USE_UNLOCKED_IO -/* These are wrappers for functions/macros from GNU libc. +/* These are wrappers for functions/macros from the GNU C library, and + from other C libraries supporting POSIX's optional thread-safe functions. + The standard I/O functions are thread-safe. These *_unlocked ones are more efficient but not thread-safe. That they're not thread-safe is - fine since all of the applications in this package are single threaded. */ + fine since all of the applications in this package are single threaded. + + Also, some code that is shared with the GNU C library may invoke + the *_unlocked functions directly. On hosts that lack those + functions, invoke the non-thread-safe versions instead. */ + +# include <stdio.h> # if HAVE_DECL_CLEARERR_UNLOCKED # undef clearerr # define clearerr(x) clearerr_unlocked (x) +# else +# define clearerr_unlocked(x) clearerr (x) # endif # if HAVE_DECL_FEOF_UNLOCKED # undef feof # define feof(x) feof_unlocked (x) +# else +# define feof_unlocked(x) feof (x) # endif # if HAVE_DECL_FERROR_UNLOCKED # undef ferror # define ferror(x) ferror_unlocked (x) +# else +# define ferror_unlocked(x) ferror (x) # endif # if HAVE_DECL_FFLUSH_UNLOCKED # undef fflush # define fflush(x) fflush_unlocked (x) +# else +# define fflush_unlocked(x) fflush (x) # endif # if HAVE_DECL_FGETS_UNLOCKED # undef fgets # define fgets(x,y,z) fgets_unlocked (x,y,z) +# else +# define fgets_unlocked(x,y,z) fgets (x,y,z) # endif # if HAVE_DECL_FPUTC_UNLOCKED # undef fputc # define fputc(x,y) fputc_unlocked (x,y) +# else +# define fputc_unlocked(x,y) fputc (x,y) # endif # if HAVE_DECL_FPUTS_UNLOCKED # undef fputs # define fputs(x,y) fputs_unlocked (x,y) +# else +# define fputs_unlocked(x,y) fputs (x,y) # endif # if HAVE_DECL_FREAD_UNLOCKED # undef fread # define fread(w,x,y,z) fread_unlocked (w,x,y,z) +# else +# define fread_unlocked(w,x,y,z) fread (w,x,y,z) # endif # if HAVE_DECL_FWRITE_UNLOCKED # undef fwrite # define fwrite(w,x,y,z) fwrite_unlocked (w,x,y,z) +# else +# define fwrite_unlocked(w,x,y,z) fwrite (w,x,y,z) # endif # if HAVE_DECL_GETC_UNLOCKED # undef getc # define getc(x) getc_unlocked (x) +# else +# define getc_unlocked(x) getc (x) # endif # if HAVE_DECL_GETCHAR_UNLOCKED # undef getchar # define getchar() getchar_unlocked () +# else +# define getchar_unlocked() getchar () # endif # if HAVE_DECL_PUTC_UNLOCKED # undef putc # define putc(x,y) putc_unlocked (x,y) +# else +# define putc_unlocked(x,y) putc (x,y) # endif # if HAVE_DECL_PUTCHAR_UNLOCKED # undef putchar # define putchar(x) putchar_unlocked (x) +# else +# define putchar_unlocked(x) putchar (x) # endif +# undef flockfile +# define flockfile(x) ((void) 0) + +# undef ftrylockfile +# define ftrylockfile(x) 0 + +# undef funlockfile +# define funlockfile(x) ((void) 0) + # endif /* USE_UNLOCKED_IO */ #endif /* UNLOCKED_IO_H */ |