diff options
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)) |