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