diff options
Diffstat (limited to 'sound/core/seq/seq_fifo.h')
| -rw-r--r-- | sound/core/seq/seq_fifo.h | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/sound/core/seq/seq_fifo.h b/sound/core/seq/seq_fifo.h index 062c446e7867..4c9c49127746 100644 --- a/sound/core/seq/seq_fifo.h +++ b/sound/core/seq/seq_fifo.h @@ -1,22 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * ALSA sequencer FIFO * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * */ #ifndef __SND_SEQ_FIFO_H #define __SND_SEQ_FIFO_H @@ -52,6 +37,7 @@ int snd_seq_fifo_event_in(struct snd_seq_fifo *f, struct snd_seq_event *event); /* lock fifo from release */ #define snd_seq_fifo_lock(fifo) snd_use_lock_use(&(fifo)->use_lock) #define snd_seq_fifo_unlock(fifo) snd_use_lock_free(&(fifo)->use_lock) +DEFINE_GUARD(snd_seq_fifo, struct snd_seq_fifo *, snd_seq_fifo_lock(_T), snd_seq_fifo_unlock(_T)) /* get a cell from fifo - fifo should be locked */ int snd_seq_fifo_cell_out(struct snd_seq_fifo *f, struct snd_seq_event_cell **cellp, int nonblock); @@ -68,5 +54,7 @@ int snd_seq_fifo_poll_wait(struct snd_seq_fifo *f, struct file *file, poll_table /* resize pool in fifo */ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize); +/* get the number of unused cells safely */ +int snd_seq_fifo_unused_cells(struct snd_seq_fifo *f); #endif |