wait_for (serial_t scb, int timeout)
{
#ifdef HAVE_SGTTY
- {
- struct timeval tv;
- fd_set readfds;
+ while (1)
+ {
+ struct timeval tv;
+ fd_set readfds;
+ int numfds;
- FD_ZERO (&readfds);
+ /* NOTE: Some OS's can scramble the READFDS when the select()
+ call fails (ex the kernel with Red Hat 5.2). Initialize all
+ arguments before each call. */
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
- FD_SET (scb->fd, &readfds);
+ FD_ZERO (&readfds);
+ FD_SET (scb->fd, &readfds);
- while (1)
- {
- int numfds;
+ if (timeout >= 0)
+ numfds = select (scb->fd + 1, &readfds, 0, 0, &tv);
+ else
+ numfds = select (scb->fd + 1, &readfds, 0, 0, 0);
- if (timeout >= 0)
- numfds = select (scb->fd + 1, &readfds, 0, 0, &tv);
+ if (numfds <= 0)
+ if (numfds == 0)
+ return SERIAL_TIMEOUT;
+ else if (errno == EINTR)
+ continue;
else
- numfds = select (scb->fd + 1, &readfds, 0, 0, 0);
-
- if (numfds <= 0)
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else if (errno == EINTR)
- continue;
- else
- return SERIAL_ERROR; /* Got an error from select or poll */
+ return SERIAL_ERROR; /* Got an error from select or poll */
- return 0;
- }
- }
+ return 0;
+ }
#endif /* HAVE_SGTTY */
#if defined HAVE_TERMIO || defined HAVE_TERMIOS
int
ser_unix_wait_for (serial_t scb, int timeout)
{
- int numfds;
- struct timeval tv;
- fd_set readfds, exceptfds;
+ while (1)
+ {
+ int numfds;
+ struct timeval tv;
+ fd_set readfds, exceptfds;
- FD_ZERO (&readfds);
- FD_ZERO (&exceptfds);
+ /* NOTE: Some OS's can scramble the READFDS when the select()
+ call fails (ex the kernel with Red Hat 5.2). Initialize all
+ arguments before each call. */
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
- FD_SET (scb->fd, &readfds);
- FD_SET (scb->fd, &exceptfds);
+ FD_ZERO (&readfds);
+ FD_ZERO (&exceptfds);
+ FD_SET (scb->fd, &readfds);
+ FD_SET (scb->fd, &exceptfds);
- while (1)
- {
if (timeout >= 0)
numfds = select (scb->fd + 1, &readfds, 0, &exceptfds, &tv);
else
}
status = ser_unix_wait_for (scb, delta);
- timeout -= delta;
+ if (timeout > 0)
+ timeout -= delta;
/* If we got a character or an error back from wait_for, then we can
break from the loop before the timeout is completed. */
if (SERIAL_DEBUG_P (scb))
fprintf_unfiltered (gdb_stdlog, "[fd%d->synchronous]\n",
scb->fd);
- /* De-schedule what ever tasks are currently scheduled. */
+ /* De-schedule whatever tasks are currently scheduled. */
switch (scb->async_state)
{
case FD_SCHEDULED: