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newlib-cygwin
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* tty.cc (tty::make_pipes): Set to_slave pipe mode to nonblocking. 

* fhandler_tty.cc (fhandler_pty_master::accept_input): If pipe buffer
is full, give slave a chance to read data.
This commit is contained in:
Egor Duda 2001-04-27 06:27:28 +00:00
parent 22ae5a5be8
commit a069f5602e
3 changed files with 36 additions and 4 deletions
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6
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,9 @@
2001-04-27 Egor Duda <deo@logos-m.ru>
* tty.cc (tty::make_pipes): Set to_slave pipe mode to nonblocking.
* fhandler_tty.cc (fhandler_pty_master::accept_input): If pipe buffer
is full, give slave a chance to read data.
2001-04-26 Kazuhiro Fujieda <fujieda@jaist.ac.jp>
* security.cc (alloc_sd): Add unrelated ACCESS_ALLOWED_ACE behind

30
winsup/cygwin/fhandler_tty.cc
View File

@ -167,18 +167,40 @@ fhandler_pty_master::doecho (const void *str, DWORD len)
int
fhandler_pty_master::accept_input ()
{
DWORD written;
DWORD bytes_left, written;
DWORD n;
DWORD rc;
char* p;
rc = WaitForSingleObject (input_mutex, INFINITE);
n = get_ttyp ()->read_retval = eat_readahead (-1);
bytes_left = n = eat_readahead (-1);
get_ttyp ()->read_retval = 0;
p = rabuf;
if (n != 0)
{
termios_printf ("about to write %d chars to slave", n);
rc = WriteFile (get_output_handle (), rabuf, n, &written, NULL);
while (bytes_left > 0)
{
termios_printf ("about to write %d chars to slave", bytes_left);
rc = WriteFile (get_output_handle (), p, bytes_left, &written, NULL);
if (!rc)
{
debug_printf ("error writing to pipe %E");
break;
}
get_ttyp ()->read_retval += written;
p += written;
bytes_left -= written;
if (bytes_left > 0)
{
debug_printf ("to_slave pipe is full");
SetEvent (input_available_event);
ReleaseMutex (input_mutex);
Sleep (10);
rc = WaitForSingleObject (input_mutex, INFINITE);
}
}
}
else
termios_printf ("sending EOF to slave");

4
winsup/cygwin/tty.cc
View File

@ -367,6 +367,10 @@ tty::make_pipes (fhandler_pty_master *ptym)
ProtectHandle1 (from_slave, from_pty);
termios_printf ("tty%d from_slave %p, to_slave %p", ntty, from_slave,
to_slave);
DWORD pipe_mode = PIPE_NOWAIT;
if (!SetNamedPipeHandleState (to_slave, &pipe_mode, NULL, NULL))
termios_printf ("can't set to_slave to non-blocking mode");
ptym->set_io_handle (from_slave);
ptym->set_output_handle (to_slave);
return TRUE;