| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * ALSA sequencer Priority Queue |
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| 4 | * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> |
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| 5 | */ |
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| 6 | #ifndef __SND_SEQ_PRIOQ_H |
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| 7 | #define __SND_SEQ_PRIOQ_H |
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| 8 | |
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| 9 | #include "seq_memory.h" |
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| 10 | |
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| 11 | |
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| 12 | /* === PRIOQ === */ |
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| 13 | |
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| 14 | struct snd_seq_prioq { |
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| 15 | struct snd_seq_event_cell *head; /* pointer to head of prioq */ |
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| 16 | struct snd_seq_event_cell *tail; /* pointer to tail of prioq */ |
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| 17 | int cells; |
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| 18 | spinlock_t lock; |
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| 19 | }; |
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| 20 | |
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| 21 | |
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| 22 | /* create new prioq (constructor) */ |
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| 23 | struct snd_seq_prioq *snd_seq_prioq_new(void); |
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| 24 | |
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| 25 | /* delete prioq (destructor) */ |
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| 26 | void snd_seq_prioq_delete(struct snd_seq_prioq **fifo); |
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| 27 | |
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| 28 | /* enqueue cell to prioq */ |
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| 29 | int snd_seq_prioq_cell_in(struct snd_seq_prioq *f, struct snd_seq_event_cell *cell); |
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| 30 | |
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| 31 | /* dequeue cell from prioq */ |
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| 32 | struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f, |
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| 33 | void *current_time); |
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| 34 | |
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| 35 | /* return number of events available in prioq */ |
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| 36 | int snd_seq_prioq_avail(struct snd_seq_prioq *f); |
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| 37 | |
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| 38 | /* client left queue */ |
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| 39 | void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp); |
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| 40 | |
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| 41 | /* Remove events */ |
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| 42 | void snd_seq_prioq_remove_events(struct snd_seq_prioq *f, int client, |
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| 43 | struct snd_seq_remove_events *info); |
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| 44 | |
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| 45 | #endif |
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| 46 | |
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