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added full async interface to timer API

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- added snd_async_add_timer_handler and snd_async_handler_get_timer functions
- added async command to test/timer.c
This commit is contained in:
Jaroslav Kysela 2005-05-11 12:18:51 +00:00
parent a022bc1fbc
commit 8ec3e4ea6c
7 changed files with 99 additions and 3 deletions
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35
test/timer.c
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@ -54,6 +54,19 @@ void read_loop(void *handle, int master_ticks, int timeout)
free(fds);
}
static void async_callback(snd_async_handler_t *ahandler)
{
snd_timer_t *handle = snd_async_handler_get_timer(ahandler);
int *acount = snd_async_handler_get_callback_private(ahandler);
snd_timer_read_t tr;
while (snd_timer_read(handle, &tr, sizeof(tr)) == sizeof(tr)) {
printf("TIMER: resolution = %uns, ticks = %u\n",
tr.resolution, tr.ticks);
}
(*acount)++;
}
int main(int argc, char *argv[])
{
int idx, err;
@ -63,11 +76,14 @@ int main(int argc, char *argv[])
int device = SND_TIMER_GLOBAL_SYSTEM;
int subdevice = 0;
int list = 0;
int async = 0;
int acount = 0;
snd_timer_t *handle;
snd_timer_id_t *id;
snd_timer_info_t *info;
snd_timer_params_t *params;
char timername[64];
snd_async_handler_t *ahandler;
snd_timer_id_alloca(&id);
snd_timer_info_alloca(&info);
@ -87,6 +103,8 @@ int main(int argc, char *argv[])
subdevice = atoi(argv[idx]+10);
} else if (!strcmp(argv[idx], "list")) {
list = 1;
} else if (!strcmp(argv[idx], "async")) {
async = 1;
}
idx++;
}
@ -148,11 +166,26 @@ int main(int argc, char *argv[])
exit(0);
}
show_status(handle);
if (async) {
err = snd_async_add_timer_handler(&ahandler, handle, async_callback, &acount);
if (err < 0) {
fprintf(stderr, "unable to add async handler %i (%s)\n", err, snd_strerror(err));
exit(EXIT_FAILURE);
}
}
if ((err = snd_timer_start(handle)) < 0) {
fprintf(stderr, "timer start %i (%s)\n", err, snd_strerror(err));
exit(EXIT_FAILURE);
}
read_loop(handle, 25, snd_timer_info_is_slave(info) ? 10000 : 25);
if (async) {
/* because all other work is done in the signal handler,
suspend the process */
while (acount < 25)
sleep(1);
snd_timer_stop(handle);
} else {
read_loop(handle, 25, snd_timer_info_is_slave(info) ? 10000 : 25);
}
show_status(handle);
snd_timer_close(handle);
printf("Done\n");