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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-05-20 17:09:12 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-05-20 17:09:12 +0000 |
| commit | 27dccaec154688ce1e89ebafbb8209104b13c7c6 (patch) | |
| tree | 402c40571ff208ec1f4cd7e7971b9f4c03bed366 /c/src/lib/libc | |
| parent | Patch from Ralf Corseipus to fix latent configure problems suddenly triggered: (diff) | |
| download | rtems-27dccaec154688ce1e89ebafbb8209104b13c7c6.tar.bz2 | |
Patch to add return status to rtems_termios_enqueue_raw_characters from
Eric Norum per request from Geoffroy Montel:
> The rtems_termios_enqueue_raw_characters function type is void.
> The problem is that I can't return an error message if the input
> buffer is full.
> Could we add a return value?
Sure, but what would you do with the overflow indication? POSIX says,
``when the input limit is reached, the saved characters are thrown away
without notice''.
Anyhow, the change is so small I've done it and enclosed the patch.
Diffstat (limited to 'c/src/lib/libc')
| -rw-r--r-- | c/src/lib/libc/libio.h | 2 | ||||
| -rw-r--r-- | c/src/lib/libc/termios.c | 4 |
2 files changed, 4 insertions, 2 deletions
diff --git a/c/src/lib/libc/libio.h b/c/src/lib/libc/libio.h index 0826579805..3cc87d1d87 100644 --- a/c/src/lib/libc/libio.h +++ b/c/src/lib/libc/libio.h @@ -156,7 +156,7 @@ rtems_status_code rtems_termios_close (void *arg); rtems_status_code rtems_termios_read (void *arg); rtems_status_code rtems_termios_write (void *arg); rtems_status_code rtems_termios_ioctl (void *arg); -void rtems_termios_enqueue_raw_characters (void *ttyp, char *buf, int len); +int rtems_termios_enqueue_raw_characters (void *ttyp, char *buf, int len); void rtems_termios_dequeue_characters (void *ttyp, int len); void rtems_termios_reserve_resources( rtems_configuration_table *configuration, diff --git a/c/src/lib/libc/termios.c b/c/src/lib/libc/termios.c index a41817b28a..b2d1bb1499 100644 --- a/c/src/lib/libc/termios.c +++ b/c/src/lib/libc/termios.c @@ -837,8 +837,9 @@ rtems_termios_read (void *arg) * Place characters on raw queue. * NOTE: This routine runs in the context of the * device receive interrupt handler. + * Returns the number of characters dropped because of overlow. */ -void +int rtems_termios_enqueue_raw_characters (void *ttyp, char *buf, int len) { struct rtems_termios_tty *tty = ttyp; @@ -855,6 +856,7 @@ rtems_termios_enqueue_raw_characters (void *ttyp, char *buf, int len) tty->rawInBufTail = newTail; } rtems_semaphore_release (tty->rawInBufSemaphore); + return len; } /* |