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* fhandler_disk_file.cc (fhandler_disk_file::lock): Use UINT32_MAX

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instead of 0xffffffff.  Accomodate Win 9x bug in evaluating length
	of area to lock when given length is 0.
This commit is contained in:
Corinna Vinschen 2003-12-03 11:22:49 +00:00
parent 1843517401
commit d2fa946e51
2 changed files with 12 additions and 3 deletions
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6
winsup/cygwin/ChangeLog
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@ -1,3 +1,9 @@
2003-12-03 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::lock): Use UINT32_MAX
instead of 0xffffffff. Accomodate Win 9x bug in evaluating length
of area to lock when given length is 0.
2003-12-03 Pierre Humblet <pierre.humblet@ieee.org>
* fhandler_disk_file.cc (fhandler_disk_file::lock): Interchange

9
winsup/cygwin/fhandler_disk_file.cc
View File

@ -536,18 +536,21 @@ fhandler_disk_file::lock (int cmd, struct __flock64 *fl)
DWORD off_high, off_low, len_high, len_low;
off_low = (DWORD)(win32_start & 0xffffffff);
off_low = (DWORD)(win32_start & UINT32_MAX);
off_high = (DWORD)(win32_start >> 32);
if (win32_len == 0)
{
/* Special case if len == 0 for POSIX means lock to the end of
the entire file (and all future extensions). */
len_low = 0xffffffff;
/* CV, 2003-12-03: And yet another Win 9x bugginess. For some reason
offset + length must be <= 0x100000000. I'm using 0xffffffff as
upper border here, this should be sufficient. */
len_low = UINT32_MAX - (wincap.lock_file_highword () ? 0 : off_low);
len_high = wincap.lock_file_highword ();
}
else
{
len_low = (DWORD)(win32_len & 0xffffffff);
len_low = (DWORD)(win32_len & UINT32_MAX);
len_high = (DWORD)(win32_len >> 32);
}