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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 00:54:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:47 -0700 |
| commit | 39c2e60f8c584c1b29b5c4375dd49df7995386bb (patch) | |
| tree | fcb7e742d38c6e4655660d89be01e61d58ceebc4 /include | |
| parent | 8cd64518a3d166a21f5c69ac7860b3add0369dd0 (diff) | |
| download | linux-39c2e60f8c584c1b29b5c4375dd49df7995386bb.tar.gz linux-39c2e60f8c584c1b29b5c4375dd49df7995386bb.tar.bz2 linux-39c2e60f8c584c1b29b5c4375dd49df7995386bb.zip | |
tty: add throttle/unthrottle helpers
Something Arjan suggested which allows us to clean up the code nicely
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tty.h | 2 | ||||
| -rw-r--r-- | include/linux/tty_driver.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index c36a76da2ae2..7f7121f9c968 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -303,6 +303,8 @@ extern int tty_put_char(struct tty_struct *tty, unsigned char c); extern int tty_chars_in_buffer(struct tty_struct *tty); extern int tty_write_room(struct tty_struct *tty); extern void tty_driver_flush_buffer(struct tty_struct *tty); +extern void tty_throttle(struct tty_struct *tty); +extern void tty_unthrottle(struct tty_struct *tty); extern int is_current_pgrp_orphaned(void); extern struct pid *tty_get_pgrp(struct tty_struct *tty); diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index f80d73b690f6..59f1c0bd8f9c 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -100,6 +100,8 @@ * This routine notifies the tty driver that input buffers for * the line discipline are close to full, and it should somehow * signal that no more characters should be sent to the tty. + * + * Optional: Always invoke via tty_throttle(); * * void (*unthrottle)(struct tty_struct * tty); * @@ -107,6 +109,8 @@ * that characters can now be sent to the tty without fear of * overrunning the input buffers of the line disciplines. * + * Optional: Always invoke via tty_unthrottle(); + * * void (*stop)(struct tty_struct *tty); * * This routine notifies the tty driver that it should stop |