diff options
Diffstat (limited to '')
| -rw-r--r-- | cpukit/libcsupport/src/termios.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/cpukit/libcsupport/src/termios.c b/cpukit/libcsupport/src/termios.c index f3637d37e3..c2a43c7707 100644 --- a/cpukit/libcsupport/src/termios.c +++ b/cpukit/libcsupport/src/termios.c @@ -894,9 +894,10 @@ rtems_termios_enqueue_raw_characters (void *ttyp, char *buf, int len) * device transmit interrupt handler. * The second argument is the number of characters transmitted so far. * This value will always be 1 for devices which generate an interrupt - * for each transmitted character. + * for each transmitted character. + * It returns number of characters left to transmit */ -void +int rtems_termios_dequeue_characters (void *ttyp, int len) { struct rtems_termios_tty *tty = ttyp; @@ -906,13 +907,14 @@ rtems_termios_dequeue_characters (void *ttyp, int len) if (tty->rawOutBufState == rob_wait) rtems_semaphore_release (tty->rawOutBufSemaphore); if ( tty->rawOutBufHead == tty->rawOutBufTail ) - return; + return 0; newTail = (tty->rawOutBufTail + len) % RAW_OUTPUT_BUFFER_SIZE; if (newTail == tty->rawOutBufHead) { /* * Buffer empty */ tty->rawOutBufState = rob_idle; + nToSend = 0; } else { /* @@ -926,4 +928,8 @@ rtems_termios_dequeue_characters (void *ttyp, int len) tty->rawOutBufState = rob_busy; } tty->rawOutBufTail = newTail; + + return nToSend; } + + |