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Cygwin: serial: wait for CancelIo completion 

Per https://devblogs.microsoft.com/oldnewthing/20110202-00/?p=11613
GetOverlappedResult must be called blocking, waiting for the overlapped
operation to complete.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2020-03-16 10:20:16 +01:00
parent b37a3388cc
commit 7947581905
1 changed files with 1 additions and 1 deletions
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2
winsup/cygwin/fhandler_serial.cc
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@ -135,7 +135,7 @@ fhandler_serial::raw_read (void *ptr, size_t& ulen)
PurgeComm apparently discards in-flight bytes while CancelIo
only stops the overlapped IO routine. */
CancelIo (get_handle ());
if (GetOverlappedResult (get_handle (), &io_status, &n, FALSE))
if (GetOverlappedResult (get_handle (), &io_status, &n, TRUE))
tot = n;
else if (GetLastError () != ERROR_OPERATION_ABORTED)
goto err;