linux/sound/core/hrtimer.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * ALSA timer back-end using hrtimer
 * Copyright (C) 2008 Takashi Iwai
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/hrtimer.h>
#include <sound/core.h>
#include <sound/timer.h>

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;

MODULE_ALIAS(…) …;

#define NANO_SEC …
static unsigned int resolution;

struct snd_hrtimer { … };

static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt)
{ … }

static int snd_hrtimer_open(struct snd_timer *t)
{ … }

static int snd_hrtimer_close(struct snd_timer *t)
{ … }

static int snd_hrtimer_start(struct snd_timer *t)
{ … }

static int snd_hrtimer_stop(struct snd_timer *t)
{ … }

static const struct snd_timer_hardware hrtimer_hw __initconst = …;

/*
 * entry functions
 */

static struct snd_timer *mytimer;

static int __init snd_hrtimer_init(void)
{ … }

static void __exit snd_hrtimer_exit(void)
{ … }

module_init(…) …;
module_exit(snd_hrtimer_exit);