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Diffstat (limited to 'sound/core/seq/seq_prioq.h')
-rw-r--r-- | sound/core/seq/seq_prioq.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sound/core/seq/seq_prioq.h b/sound/core/seq/seq_prioq.h new file mode 100644 index 000000000..5811a87de --- /dev/null +++ b/sound/core/seq/seq_prioq.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * ALSA sequencer Priority Queue + * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> + */ +#ifndef __SND_SEQ_PRIOQ_H +#define __SND_SEQ_PRIOQ_H + +#include "seq_memory.h" + + +/* === PRIOQ === */ + +struct snd_seq_prioq { + struct snd_seq_event_cell *head; /* pointer to head of prioq */ + struct snd_seq_event_cell *tail; /* pointer to tail of prioq */ + int cells; + spinlock_t lock; +}; + + +/* create new prioq (constructor) */ +struct snd_seq_prioq *snd_seq_prioq_new(void); + +/* delete prioq (destructor) */ +void snd_seq_prioq_delete(struct snd_seq_prioq **fifo); + +/* enqueue cell to prioq */ +int snd_seq_prioq_cell_in(struct snd_seq_prioq *f, struct snd_seq_event_cell *cell); + +/* dequeue cell from prioq */ +struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f, + void *current_time); + +/* return number of events available in prioq */ +int snd_seq_prioq_avail(struct snd_seq_prioq *f); + +/* client left queue */ +void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp); + +/* Remove events */ +void snd_seq_prioq_remove_events(struct snd_seq_prioq *f, int client, + struct snd_seq_remove_events *info); + +#endif |