| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * ALSA sequencer Priority Queue |
| 3 | * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> |
| 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | #ifndef __SND_SEQ_PRIOQ_H |
| 22 | #define __SND_SEQ_PRIOQ_H |
| 23 | |
| 24 | #include "seq_memory.h" |
| 25 | |
| 26 | |
| 27 | /* === PRIOQ === */ |
| 28 | |
| 29 | typedef struct { |
| 30 | snd_seq_event_cell_t* head; /* pointer to head of prioq */ |
| 31 | snd_seq_event_cell_t* tail; /* pointer to tail of prioq */ |
| 32 | int cells; |
| 33 | spinlock_t lock; |
| 34 | } prioq_t; |
| 35 | |
| 36 | |
| 37 | /* create new prioq (constructor) */ |
| 38 | extern prioq_t *snd_seq_prioq_new(void); |
| 39 | |
| 40 | /* delete prioq (destructor) */ |
| 41 | extern void snd_seq_prioq_delete(prioq_t **fifo); |
| 42 | |
| 43 | /* enqueue cell to prioq */ |
| 44 | extern int snd_seq_prioq_cell_in(prioq_t *f, snd_seq_event_cell_t *cell); |
| 45 | |
| 46 | /* dequeue cell from prioq */ |
| 47 | extern snd_seq_event_cell_t *snd_seq_prioq_cell_out(prioq_t *f); |
| 48 | |
| 49 | /* return number of events available in prioq */ |
| 50 | extern int snd_seq_prioq_avail(prioq_t *f); |
| 51 | |
| 52 | /* peek at cell at the head of the prioq */ |
| 53 | extern snd_seq_event_cell_t *snd_seq_prioq_cell_peek(prioq_t *f); |
| 54 | |
| 55 | /* client left queue */ |
| 56 | extern void snd_seq_prioq_leave(prioq_t *f, int client, int timestamp); |
| 57 | |
| 58 | /* Remove events */ |
| 59 | void snd_seq_prioq_remove_events(prioq_t * f, int client, |
| 60 | snd_seq_remove_events_t *info); |
| 61 | |
| 62 | #endif |