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| author | Paul Eggert <eggert@cs.ucla.edu> | 2013-01-31 22:30:51 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2013-01-31 22:30:51 -0800 |
| commit | 8654f9d7d6d7c3ee97232a34a40250dcbc57af8e (patch) | |
| tree | ff488081b57dabdfe7e85c11a34e8ac522b5bdb4 /nt/inc/sys/stat.h | |
| parent | 44b12dd6994a6214b9d6f73539b441080611369b (diff) | |
| download | emacs-8654f9d7d6d7c3ee97232a34a40250dcbc57af8e.tar.gz | |
Use fdopendir, fstatat and readlinkat, for efficiency.
On my host, this speeds up directory-files-and-attributes by a
factor of 3, when applied to Emacs's src directory.
These functions are standardized by POSIX and are common these
days; fall back on a (slower) gnulib implementation if the host
is too old to supply them.
* .bzrignore: Add lib/dirent.h.
* lib/Makefile.am (libgnu_a_SOURCES): Add openat-die.c, save-cwd.c.
* lib/careadlinkat.c, lib/careadlinkat.h: Merge from gnulib,
incorporating: 2013-01-29 careadlinkat: do not provide careadlinkatcwd.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* lib/dirent.in.h, lib/fdopendir.c, lib/fstatat.c, lib/openat-priv.h:
* lib/openat-proc.c, lib/openat.h, m4/dirent_h.m4, m4/fdopendir.m4:
* m4/fstatat.m4: New files, from gnulib.
* lib/openat-die.c, lib/save-cwd.c, lib/save-cwd.h: New files.
These last three are specific to Emacs and are not copied from gnulib.
They are simpler than the gnulib versions and are tuned for Emacs.
* admin/merge-gnulib (GNULIB_MODULES): Add fdopendir, fstatat, readlinkat.
(GNULIB_TOOL_FLAGS): Do not avoid at-internal, openat-h.
Avoid dup, open, opendir.
* nt/inc/sys/stat.h (fstatat):
* nt/inc/unistd.h (readlinkat): New decls.
* src/conf_post.h (GNULIB_SUPPORT_ONLY_AT_FDCWD): Remove.
* src/dired.c: Include <fcntl.h>.
(open_directory): New function, which uses open and fdopendir
rather than opendir. DOS_NT platforms still use opendir, though.
(directory_files_internal, file_name_completion): Use it.
(file_attributes): New function, with most of the old Ffile_attributes.
(directory_files_internal, Ffile_attributes): Use it.
(file_attributes, file_name_completion_stat): First arg is now fd,
not dir name. All uses changed. Use fstatat rather than lstat +
stat.
(file_attributes): Use emacs_readlinkat rather than Ffile_symlink_p.
* src/fileio.c: Include <allocator.h>, <careadlinkat.h>.
(emacs_readlinkat): New function, with much of the old
Ffile_symlink_p, but with an fd argument for speed.
It uses readlinkat rather than careadlinkatcwd, so that it
need not assume the working directory.
(Ffile_symlink_p): Use it.
* src/filelock.c (current_lock_owner): Use emacs_readlinkat
rather than emacs_readlink.
* src/lisp.h (emacs_readlinkat): New decl.
(READLINK_BUFSIZE, emacs_readlink): Remove.
* src/sysdep.c: Do not include <allocator.h>, <careadlinkat.h>.
(emacs_norealloc_allocator, emacs_readlink): Remove.
This stuff is moved to fileio.c.
* src/w32.c (fstatat, readlinkat): New functions.
(careadlinkat): Don't check that fd == AT_FDCWD.
(careadlinkatcwd): Remove; no longer needed.
Fixes: debbugs:13539
Diffstat (limited to 'nt/inc/sys/stat.h')
| -rw-r--r-- | nt/inc/sys/stat.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/nt/inc/sys/stat.h b/nt/inc/sys/stat.h index 45689d24776..c356283c04b 100644 --- a/nt/inc/sys/stat.h +++ b/nt/inc/sys/stat.h @@ -110,6 +110,7 @@ _CRTIMP int __cdecl __MINGW_NOTHROW fstat (int, struct stat*); _CRTIMP int __cdecl __MINGW_NOTHROW chmod (const char*, int); _CRTIMP int __cdecl __MINGW_NOTHROW stat (const char*, struct stat*); _CRTIMP int __cdecl __MINGW_NOTHROW lstat (const char*, struct stat*); +_CRTIMP int __cdecl __MINGW_NOTHROW fstatat (int, char const *, + struct stat *, int); #endif /* INC_SYS_STAT_H_ */ - |