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| author | Christian Mauderer <christian.mauderer@embedded-brains.de> | 2021-08-12 09:51:55 +0200 |
|---|---|---|
| committer | Christian Mauderer <christian.mauderer@embedded-brains.de> | 2022-02-10 09:02:03 +0100 |
| commit | 9942ff80c46d5658f22dc5ac9fae4dcaba4f9966 (patch) | |
| tree | 3182d1d45c7da1a524c1e3290d27b8213868eff6 | |
| parent | bsp/atsam: Optionally use DMA for UART Rx (diff) | |
| download | rtems-9942ff80c46d5658f22dc5ac9fae4dcaba4f9966.tar.bz2 | |
termios: Pass number of sent chars to l_start
At the moment the line discipline start function (l_start) has no
possibility to get feedback about the number of characters that have
been sent. This patch passes that information via an additional
parameter.
The change might trigger a warning on existing code because of a pointer
mismatch but it shouldn't break it. An existing function with the old
API will just ignore the additional parameter.
Update #4494
| -rw-r--r-- | cpukit/include/rtems/termiostypes.h | 6 | ||||
| -rw-r--r-- | cpukit/libcsupport/src/termios.c | 5 |
2 files changed, 8 insertions, 3 deletions
diff --git a/cpukit/include/rtems/termiostypes.h b/cpukit/include/rtems/termiostypes.h index 6930e5958b..59b1b3dd96 100644 --- a/cpukit/include/rtems/termiostypes.h +++ b/cpukit/include/rtems/termiostypes.h @@ -367,6 +367,10 @@ typedef struct rtems_termios_tty { */ rtems_id rxTaskId; rtems_id txTaskId; + /* + * Information for the tx task how many characters have been dequeued. + */ + int txTaskCharsDequeued; /* * line discipline related stuff @@ -482,7 +486,7 @@ struct rtems_termios_linesw { int (*l_read )(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args); int (*l_write)(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args); int (*l_rint )(int c,struct rtems_termios_tty *tp); - int (*l_start)(struct rtems_termios_tty *tp); + int (*l_start)(struct rtems_termios_tty *tp,int len); int (*l_ioctl)(struct rtems_termios_tty *tp,rtems_libio_ioctl_args_t *args); int (*l_modem)(struct rtems_termios_tty *tp,int flags); }; diff --git a/cpukit/libcsupport/src/termios.c b/cpukit/libcsupport/src/termios.c index 75925cf8ec..2b354203e9 100644 --- a/cpukit/libcsupport/src/termios.c +++ b/cpukit/libcsupport/src/termios.c @@ -1966,6 +1966,7 @@ rtems_termios_dequeue_characters (void *ttyp, int len) /* * send wake up to transmitter task */ + tty->txTaskCharsDequeued = len; sc = rtems_event_send(tty->txTaskId, TERMIOS_TX_START_EVENT); if (sc != RTEMS_SUCCESSFUL) rtems_fatal_error_occurred (sc); @@ -1977,7 +1978,7 @@ rtems_termios_dequeue_characters (void *ttyp, int len) * call PPP line discipline start function */ if (rtems_termios_linesw[tty->t_line].l_start != NULL) { - rtems_termios_linesw[tty->t_line].l_start(tty); + rtems_termios_linesw[tty->t_line].l_start(tty, len); } return 0; /* nothing to output in IRQ... */ } @@ -2012,7 +2013,7 @@ static rtems_task rtems_termios_txdaemon(rtems_task_argument argument) * call any line discipline start function */ if (rtems_termios_linesw[tty->t_line].l_start != NULL) { - rtems_termios_linesw[tty->t_line].l_start(tty); + rtems_termios_linesw[tty->t_line].l_start(tty, tty->txTaskCharsDequeued); if (tty->t_line == PPPDISC) { /* |