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// SPDX-License-Identifier: GPL-2.0
/*
* This tool is used by the utimer test, and it allows us to
* count the ticks of a global timer in a certain time frame
* (which is set by `timeout` parameter).
*
* Author: Ivan Orlov <ivan.orlov0322@gmail.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <alsa/asoundlib.h>
#include <time.h>
static int ticked;
static void async_callback(snd_async_handler_t *ahandler)
{
ticked++;
}
static char timer_name[64];
static void bind_to_timer(int device, int subdevice, int timeout)
{
snd_timer_t *handle;
snd_timer_params_t *params;
snd_async_handler_t *ahandler;
time_t end;
sprintf(timer_name, "hw:CLASS=%d,SCLASS=%d,DEV=%d,SUBDEV=%d",
SND_TIMER_CLASS_GLOBAL, SND_TIMER_SCLASS_NONE,
device, subdevice);
snd_timer_params_alloca(¶ms);
if (snd_timer_open(&handle, timer_name, SND_TIMER_OPEN_NONBLOCK) < 0) {
perror("Can't open the timer");
exit(EXIT_FAILURE);
}
snd_timer_params_set_auto_start(params, 1);
snd_timer_params_set_ticks(params, 1);
if (snd_timer_params(handle, params) < 0) {
perror("Can't set timer params");
exit(EXIT_FAILURE);
}
if (snd_async_add_timer_handler(&ahandler, handle, async_callback, NULL) < 0) {
perror("Can't create a handler");
exit(EXIT_FAILURE);
}
end = time(NULL) + timeout;
if (snd_timer_start(handle) < 0) {
perror("Failed to start the timer");
exit(EXIT_FAILURE);
}
printf("Timer has started\n");
while (time(NULL) <= end) {
/*
* Waiting for the timeout to elapse. Can't use sleep here, as it gets
* constantly interrupted by the signal from the timer (SIGIO)
*/
}
snd_timer_stop(handle);
snd_timer_close(handle);
}
int main(int argc, char *argv[])
{
int device, subdevice, timeout;
if (argc < 4) {
perror("Usage: %s <device> <subdevice> <timeout>");
return EXIT_FAILURE;
}
setlinebuf(stdout);
device = atoi(argv[1]);
subdevice = atoi(argv[2]);
timeout = atoi(argv[3]);
bind_to_timer(device, subdevice, timeout);
printf("Total ticks count: %d\n", ticked);
return EXIT_SUCCESS;
}
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