[PATCH 03/34] include: copy unlocked-io.h from gnulib

Sami Kerola
2013-07-07T19:55:04Z

At the moment util-linux command are not threading, which means they can
safely use thread-unsafe IO system calls which should make printing
quicker.

References: http://marc.info/?l=util-linux-ng&m=137266928927642&w=3
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---
configure.ac | 13 +++++
include/Makemodule.am | 1 +
include/unlocked-io.h | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 150 insertions(+)
create mode 100644 include/unlocked-io.h

diff --git a/configure.ac b/configure.ac
index 398aaf0..4cb87f9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -308,10 +308,21 @@ AC_CHECK_FUNCS([ \
__fpending \
secure_getenv \
__secure_getenv \
+ clearerr_unlocked \
err \
errx \
+ feof_unlocked \
+ ferror_unlocked \
+ fflush_unlocked \
+ fgets_unlocked \
+ fputc_unlocked \
+ fputs_unlocked \
+ fread_unlocked \
fsync \
futimens \
+ fwrite_unlocked \
+ getc_unlocked \
+ getchar_unlocked \
getdomainname \
getdtablesize \
getexecname \
@@ -327,6 +338,8 @@ AC_CHECK_FUNCS([ \
personality \
posix_fadvise \
prctl \
+ putc_unlocked \
+ putchar_unlocked \
rpmatch \
scandirat \
setresgid \
diff --git a/include/Makemodule.am b/include/Makemodule.am
index 7ba4593..6d0fd8a 100644
--- a/include/Makemodule.am
+++ b/include/Makemodule.am
@@ -42,6 +42,7 @@ dist_noinst_HEADERS += \
include/timer.h \
include/tt.h \
include/ttyutils.h \
+ include/unlocked-io.h \
include/wholedisk.h \
include/widechar.h \
include/xalloc.h \
diff --git a/include/unlocked-io.h b/include/unlocked-io.h
new file mode 100644
index 0000000..90bc849
--- /dev/null
+++ b/include/unlocked-io.h
@@ -0,0 +1,136 @@
+/* Prefer faster, non-thread-safe stdio functions if available.
+
+ Copyright (C) 2001-2004, 2009-2013 Free Software Foundation, Inc.
+
+ 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 3 of the License, 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Jim Meyering. */
+
+#ifndef UNLOCKED_IO_H
+# define UNLOCKED_IO_H 1
+
+/* 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.
+
+ 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_CLEARERR_UNLOCKED
+# undef clearerr
+# define clearerr(x) clearerr_unlocked (x)
+# else
+# define clearerr_unlocked(x) clearerr (x)
+# endif
+
+# if HAVE_FEOF_UNLOCKED
+# undef feof
+# define feof(x) feof_unlocked (x)
+# else
+# define feof_unlocked(x) feof (x)
+# endif
+
+# if HAVE_FERROR_UNLOCKED
+# undef ferror
+# define ferror(x) ferror_unlocked (x)
+# else
+# define ferror_unlocked(x) ferror (x)
+# endif
+
+# if HAVE_FFLUSH_UNLOCKED
+# undef fflush
+# define fflush(x) fflush_unlocked (x)
+# else
+# define fflush_unlocked(x) fflush (x)
+# endif
+
+# if HAVE_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_FPUTC_UNLOCKED
+# undef fputc
+# define fputc(x,y) fputc_unlocked (x,y)
+# else
+# define fputc_unlocked(x,y) fputc (x,y)
+# endif
+
+# if HAVE_FPUTS_UNLOCKED
+# undef fputs
+# define fputs(x,y) fputs_unlocked (x,y)
+# else
+# define fputs_unlocked(x,y) fputs (x,y)
+# endif
+
+# if HAVE_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_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_GETC_UNLOCKED
+# undef getc
+# define getc(x) getc_unlocked (x)
+# else
+# define getc_unlocked(x) getc (x)
+# endif
+
+# if HAVE_GETCHAR_UNLOCKED
+# undef getchar
+# define getchar() getchar_unlocked ()
+# else
+# define getchar_unlocked() getchar ()
+# endif
+
+# if HAVE_PUTC_UNLOCKED
+# undef putc
+# define putc(x,y) putc_unlocked (x,y)
+# else
+# define putc_unlocked(x,y) putc (x,y)
+# endif
+
+# if HAVE_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 /* UNLOCKED_IO_H */
--
1.8.3.2