FreeChainXenon/binutils-gdb
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* ser-unix.c (wait_for): Use VTIME to do timeouts instead of

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poll() for termio{s}.
This commit is contained in:
Stu Grossman 1993-05-06 22:17:10 +00:00
parent dfa592fb5a
commit 9e15da4ac4
2 changed files with 54 additions and 19 deletions
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5
gdb/ChangeLog
View file

@ -1,3 +1,8 @@
Thu May 6 15:15:46 1993 Stu Grossman (grossman@cygnus.com)
* ser-unix.c (wait_for): Use VTIME to do timeouts instead of
poll() for termio{s}.
Thu May 6 10:03:41 1993 Jim Kingdon (kingdon@cygnus.com)
* i386-tdep.c (i386_frame_num_args): Always return -1.

68
gdb/ser-unix.c
View file

@ -30,11 +30,9 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_TERMIOS
#include <termios.h>
#include <unistd.h>
#include <poll.h>
#endif
#ifdef HAVE_TERMIO
#include <termio.h>
#include <poll.h>
#endif
#ifdef HAVE_SGTTY
#include <sgtty.h>
@ -124,9 +122,16 @@ hardwire_raw(scb)
if (ioctl (scb->fd, TIOCSETP, &sgttyb))
fprintf(stderr, "TIOCSETP failed: %s\n", safe_strerror(errno));
#endif
scb->current_timeout = 0;
}
/* Wait for input on scb, with timeout seconds */
/* Wait for input on scb, with timeout seconds. Returns 0 on success,
otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
For termio{s}, we actually just setup VTIME if necessary, and let the
timeout occur in the read() in hardwire_read().
*/
static int
wait_for(scb, timeout)
@ -151,26 +156,49 @@ wait_for(scb, timeout)
else
numfds = select(scb->fd+1, &readfds, 0, 0, 0);
#endif /* HAVE_SGTTY */
#if defined HAVE_TERMIO || defined HAVE_TERMIOS
struct pollfd pollfd;
pollfd.fd = scb->fd;
pollfd.events = POLLIN | POLLPRI;
if (timeout > 0)
timeout *= 1000;
numfds = poll(&pollfd, 1, timeout);
#endif /* defined HAVE_TERMIO || defined HAVE_TERMIOS */
if (numfds <= 0)
if (numfds == 0)
return SERIAL_TIMEOUT;
else
return SERIAL_ERROR; /* Got an error from select or poll */
return 0;
#endif /* HAVE_SGTTY */
#if defined HAVE_TERMIO || defined HAVE_TERMIOS
if (timeout == scb->current_timeout)
return 0;
{
#ifdef HAVE_TERMIOS
struct termios termios;
if (tcgetattr(scb->fd, &termios))
fprintf(stderr, "wait_for() tcgetattr failed: %s\n", safe_strerror(errno));
termios.c_cc[VTIME] = timeout * 10;
if (tcsetattr(scb->fd, TCSANOW, &termios))
fprintf(stderr, "wait_for() tcsetattr failed: %s\n", safe_strerror(errno));
#endif /* HAVE_TERMIOS */
#ifdef HAVE_TERMIO
struct termio termio;
if (ioctl (scb->fd, TCGETA, &termio))
fprintf(stderr, "wait_for() TCGETA failed: %s\n", safe_strerror(errno));
termio.c_cc[VTIME] = timeout * 10;
if (ioctl (scb->fd, TCSETA, &termio))
fprintf(stderr, "TCSETA failed: %s\n", safe_strerror(errno));
#endif /* HAVE_TERMIO */
scb->current_timeout = timeout;
return 0;
}
#endif /* HAVE_TERMIO || HAVE_TERMIOS */
}
/* Read a character with user-specified timeout. TIMEOUT is number of seconds
@ -197,7 +225,9 @@ hardwire_readchar(scb, timeout)
if (scb->bufcnt <= 0)
if (scb->bufcnt == 0)
return SERIAL_EOF; /* 0 chars means end of file */
return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
distinguish between EOF & timeouts
someday] */
else
return SERIAL_ERROR; /* Got an error from read */