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| author | Corinna Vinschen <corinna@vinschen.de> | 2007-01-04 09:17:55 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2007-01-04 09:17:55 +0000 |
| commit | 7bef7db5ccd9c68f28ba541cb9a7bb0b15641945 (patch) | |
| tree | 3adc4129e9755b98c6ba0afe81e63fe2b8c81d91 /winsup/cygwin/fhandler.h | |
| parent | 48edcc3fccaddb1ea621b30657f7ad44519c54b2 (diff) | |
| download | cygnal-7bef7db5ccd9c68f28ba541cb9a7bb0b15641945.tar.gz cygnal-7bef7db5ccd9c68f28ba541cb9a7bb0b15641945.tar.bz2 cygnal-7bef7db5ccd9c68f28ba541cb9a7bb0b15641945.zip | |
* fhandler.h (PREFERRED_IO_BLKSIZE): Define as 64K.
* fhandler.cc (fhandler_base::fstat): Set st_blksize to
PREFERRED_IO_BLKSIZE.
* fhandler_disk_file.cc (fhandler_base::fstat_helper): Ditto.
* fhandler_mailslot.cc (fhandler_mailslot::fstat): Ditto.
* fhandler_raw.cc (fhandler_dev_raw::fstat): Ditto.
Diffstat (limited to 'winsup/cygwin/fhandler.h')
| -rw-r--r-- | winsup/cygwin/fhandler.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h index 6e7bf4821..5a294f30a 100644 --- a/winsup/cygwin/fhandler.h +++ b/winsup/cygwin/fhandler.h @@ -1,7 +1,7 @@ /* fhandler.h Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, - 2005, 2006 Red Hat, Inc. + 2005, 2006, 2007 Red Hat, Inc. This file is part of Cygwin. @@ -25,6 +25,11 @@ details. */ both flags are set. */ #define O_NONBLOCK_MASK (O_NONBLOCK | OLD_O_NDELAY) +/* It appears that 64K is the block size used for buffered I/O on NT. + Using this blocksize in read/write calls in the application results + in a much better performance than using smaller values. */ +#define PREFERRED_IO_BLKSIZE ((blksize_t) 65536) + extern const char *windows_device_names[]; extern struct __cygwin_perfile *perfile_table; #define __fmode (*(user_data->fmode_ptr)) |