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| author | Jim Meyering <jim@meyering.net> | 2006-11-12 17:35:38 +0000 |
|---|---|---|
| committer | Jim Meyering <jim@meyering.net> | 2006-11-12 17:35:38 +0000 |
| commit | 7f01591aadb13b59cb04f9ad42400eb7ea1c6e19 (patch) | |
| tree | 999bfb5f230fed1381aca5e7f5a1d72b4cb6e3f6 /m4/i-ring.m4 | |
| parent | 42a01df09d7f13f15a54e0c4b09d121c5bf7ac66 (diff) | |
| download | gnulib-7f01591aadb13b59cb04f9ad42400eb7ea1c6e19.tar.gz | |
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
file descriptors. This also averts a failure on systems with
native openat support when a traversed directory lacks "x" access.
* lib/fts_.h: Include "i-ring.h"
(struct FTS) [fts_fd_ring]: New member.
* lib/fts.c (RESTORE_INITIAL_CWD): Also call fd_ring_clear.
(FCHDIR): Add parentheses.
(fd_ring_check, fd_ring_print) [!FTS_DEBUG]: Define away.
(cwd_advance_fd): Add a 3rd parameter. Adjust all callers.
When descending, rather than simply closing the previous
fts_cwd_fd value, push that file descriptor onto the ring.
(same_fd, fd_ring_print, fd_ring_check) [FTS_DEBUG]: New functions.
(fts_open): Initialize the new fd_ring member.
(fts_close): Clear the ring.
(fts_safe_changedir): When possible, use our new fd_ring to skip
the diropen and fstat and dev/ino comparison that would normally
accompany a virtual `chdir ("..")'.
* modules/fts (Depends-on): Add i-ring.
* modules/i-ring: New module.
* lib/i-ring.c, lib/i-ring.h, lib/i-ring-test.c: New files.
* m4/i-ring.m4: New file.
Diffstat (limited to 'm4/i-ring.m4')
| -rw-r--r-- | m4/i-ring.m4 | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/m4/i-ring.m4 b/m4/i-ring.m4 new file mode 100644 index 0000000000..2c51225e16 --- /dev/null +++ b/m4/i-ring.m4 @@ -0,0 +1,10 @@ +# serial 1 +dnl Copyright (C) 2006 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_I_RING], +[ + AC_LIBOBJ([i-ring]) +]) |