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