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* fhandler_serial.cc (fhandler_serial::raw_write): Prevent a deadlock when the

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input buffer overflows.
(fhandler_serial::raw_read): Correct to print the actual error and only call
PurgeComm when necessary.
This commit is contained in:
Christopher Faylor
2004-01-23 15:22:48 +00:00
parent ed1a95dc25
commit a33df42223
2 changed files with 16 additions and 4 deletions
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13
winsup/cygwin/fhandler_serial.cc
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@@ -133,16 +133,16 @@ fhandler_serial::raw_read (void *ptr, size_t& ulen)
continue;
err:
PurgeComm (get_handle (), PURGE_RXABORT);
debug_printf ("err %E");
if (GetLastError () == ERROR_OPERATION_ABORTED)
n = 0;
else
if (GetLastError () != ERROR_OPERATION_ABORTED)
{
PurgeComm (get_handle (), PURGE_RXABORT);
tot = -1;
__seterrno ();
break;
}
n = 0;
}
out:
@@ -169,6 +169,11 @@ fhandler_serial::raw_write (const void *ptr, size_t len)
switch (GetLastError ())
{
case ERROR_OPERATION_ABORTED:
DWORD ev;
if (!ClearCommError (get_handle (), &ev, NULL))
goto err;
if (ev)
termios_printf ("error detected %x", ev);
continue;
case ERROR_IO_PENDING:
break;