Mark Geisert wrote:
---
winsup/cygwin/fhandler_disk_file.cc | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/winsup/cygwin/fhandler_disk_file.cc
b/winsup/cygwin/fhandler_disk_file.cc
index 5dfcae4d9..2ead9948c 100644
[...]
Oops, I neglected to include an explanatory comment. Issuing simultaneous
pwrite(s) on one file descriptor from multiple threads, as one might do in a
forthcoming POSIX aio implementation, sometimes results in garbage status in the
IO_STATUS_BLOCK on return from NtWriteFile(). Zeroing beforehand made the issue
go away.
This is mildly concerning to me because there are many other uses of
IO_STATUS_BLOCK in the Cygwin DLL that haven't seemed to have needed initialization.
Puzzledly,
..mark
