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* ser-unix.c (wait_for): Do not reset timeout_remaining for cygwin32 so

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that
        we can use this member to track real timeouts.
        (hardwire_readchar): Modify for cygwin32 so that we only ever use a real
        system timeout of one second. Track the "real" timeout as a series of th
ese
        one second timeouts.
        Call ui_loop_hook to keep the gui alive.

        * top.c: Define new hook for cygwin32, "ui_loop_hook".

        * gdbtk.c (gdbtk_init): Add ui_loop_hook for CygWin32 to work around
        update problems.
This commit is contained in:
Keith Seitz
1998-05-24 21:05:12 +00:00
parent aa81c3ca99
commit 21b3bc779c
4 changed files with 56 additions and 3 deletions
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29
gdb/ser-unix.c
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@ -83,6 +83,10 @@ static int hardwire_flush_input PARAMS ((serial_t));
static int hardwire_send_break PARAMS ((serial_t));
static int hardwire_setstopbits PARAMS ((serial_t, int));
#ifdef __CYGWIN32__
extern void ui_loop_hook PARAMS ((int));
#endif
/* Open up a real live device for serial I/O */
static int
@ -430,7 +434,9 @@ wait_for(scb, timeout)
serial_t scb;
int timeout;
{
#ifndef __CYGWIN32__
scb->timeout_remaining = 0;
#endif
#ifdef HAVE_SGTTY
{
@ -539,21 +545,34 @@ wait_for(scb, timeout)
to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line
dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */
static int
hardwire_readchar(scb, timeout)
serial_t scb;
int timeout;
{
int status;
int status, t;
if (scb->bufcnt-- > 0)
return *scb->bufp++;
#ifdef __CYGWIN32__
if (timeout > 0)
timeout++;
#endif
while (1)
{
status = wait_for (scb, timeout);
#ifdef __CYGWIN32__
t = timeout == 0 ? 0 : 1;
scb->timeout_remaining = timeout < 0 ? timeout : timeout - t;
status = wait_for (scb, t);
/* -2 means disable timer */
if (ui_loop_hook)
ui_loop_hook (-2);
#else
status = wait_for (scb, timeout);
#endif
if (status < 0)
return status;
@ -570,6 +589,10 @@ hardwire_readchar(scb, timeout)
timeout = scb->timeout_remaining;
continue;
}
#ifdef __CYGWIN32__
else if (scb->timeout_remaining < 0)
continue;
#endif
else
return SERIAL_TIMEOUT;
}