struct timeval clock_diff_barrier;
/** Number of the audio format as announced by para_server. */
int current_audio_format_num;
+ /* The status task btrn is the child of the client task. */
+ struct btr_node *btrn;
};
/** The array of status items sent by para_server. */
if (s->format < 0)
return;
+ assert(s->wns);
a = afi + s->format;
if (a->num_writers == 0)
writer_cleanup(s->wns);
s->fns = NULL;
}
+/*
+ * Whenever a task commits suicide by returning from post_select with t->error
+ * < 0, it also removes its btr node. We do exactly that to kill a running
+ * task. Note that the scheduler checks t->error also _before_ each pre/post
+ * select call, so the victim will never be scheduled again.
+ */
+static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
+{
+ if (t->error < 0)
+ return;
+ t->error = error;
+ btr_remove_node(btrn);
+}
+
static void kill_all_decoders(int error)
{
int i, j;
a = afi + s->format;
if (s->wns)
for (j = 0; j < a->num_writers; j++)
- s->wns[j].task.error = error;
+ kill_btrn(s->wns[j].btrn, &s->wns[j].task, error);
if (s->fns)
for (j = 0; j < a->num_writers; j++)
- s->fns[j].task.error = error;
+ kill_btrn(s->fns[j].btrn, &s->wns[j].task, error);
if (s->receiver_node)
- s->receiver_node->task.error = error;
+ kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
+ error);
}
}
fn->conf = a->filter_conf[i];
fn->task.pre_select = f->pre_select;
fn->task.post_select = f->post_select;
- fn->btrn = btr_new_node(f->name, parent, f->execute, fn);
+
+ fn->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = f->name, .parent = parent,
+ .handler = f->execute, .context = fn));
+
f->open(fn);
register_task(&fn->task);
parent = fn->btrn;
rn = s->receiver_node;
rn->receiver = r;
rn->conf = a->receiver_conf;
- rn->btrn = btr_new_node(r->name, NULL, NULL, rn);
+ rn->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = r->name, .context = rn));
ret = r->open(rn);
if (ret < 0) {
btr_free_node(rn->btrn);
}
/* returns slot num on success. */
-static int open_current_receiver(struct sched *s)
+static int open_current_receiver(void)
{
- struct timeval diff;
int ret, cafn = stat_task->current_audio_format_num;
if (cafn < 0 || !stat_task->ct)
if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
return -1;
ret = receiver_running(cafn);
- if (ret > 0) /* already running and not eof */
+ if (ret != 0) /* already running */
return -1;
- if (ret < 0) { /* eof */
- /*
- * para_server uses a zero start time during the announcement
- * period, i.e. before it sends the first chunk. Wait until
- * this period begins to avoid restarting the receiver that
- * belongs to the file just completed.
- */
- if (stat_task->server_stream_start.tv_sec != 0) {
- sched_request_timeout_ms(100, s);
- return -1;
- }
- }
- if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
- if (tv_diff(&s->timeout, &diff, NULL) > 0)
- sched_request_timeout(&diff, s);
- else
- sched_min_delay(s);
+ if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
return -1;
- }
/* start a new receiver */
return open_receiver(cafn);
}
{
if (!stat_task->ct)
return;
+ btr_free_node(stat_task->ct->btrn);
client_close(stat_task->ct);
stat_task->ct = NULL;
clear_and_dump_items();
tv_add(now, &delay, &stat_task->restart_barrier);
}
-static bool try_to_close_slot(int slot_num)
+static void try_to_close_slot(int slot_num)
{
struct slot_info *s = &slot[slot_num];
struct audio_format_info *a = afi + s->format;
int i;
if (s->format < 0)
- return false;
+ return;
if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
- return false;
+ return;
for (i = 0; i < a->num_filters; i++)
if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
- return false;
+ return;
if (a->num_writers > 0) {
for (i = 0; i < a->num_writers; i++)
if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
- return false;
+ return;
} else {
if (s->wns && s->wns[0].task.error != -E_TASK_UNREGISTERED)
- return false;
+ return;
}
PARA_INFO_LOG("closing slot %d\n", slot_num);
close_writers(s);
close_filters(s);
close_receiver(slot_num);
clear_slot(slot_num);
- return true;
}
/*
* Check if any receivers/filters/writers need to be started and do so if
* necessary.
*/
-static void start_stop_decoders(struct sched *s)
+static void start_stop_decoders(void)
{
int i, ret;
struct slot_info *sl;
struct audio_format_info *a;
FOR_EACH_SLOT(i)
- if (try_to_close_slot(i))
- sched_min_delay(s);
-// if (audiod_status != AUDIOD_ON ||
-// !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
-// return kill_all_decoders(-E_NOT_PLAYING);
- ret = open_current_receiver(s);
+ try_to_close_slot(i);
+ if (audiod_status != AUDIOD_ON ||
+ !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
+ return kill_all_decoders(-E_NOT_PLAYING);
+ ret = open_current_receiver();
if (ret < 0)
return;
sl = slot + ret;
open_writers(sl);
activate_grab_clients();
btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
- sched_min_delay(s);
}
-/* restart the client task if necessary */
static void status_pre_select(struct sched *s, struct task *t)
+{
+ struct status_task *st = container_of(t, struct status_task, task);
+ int ret;
+
+ ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
+ sched_request_barrier(&st->restart_barrier, s);
+}
+
+/* restart the client task if necessary */
+static void status_post_select(__a_unused struct sched *s, struct task *t)
{
struct status_task *st = container_of(t, struct status_task, task);
if (!st->ct)
goto out;
if (st->ct->task.error >= 0) {
- st->ct->task.error = -E_AUDIOD_OFF;
+ kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
goto out;
}
if (st->ct->task.error != -E_TASK_UNREGISTERED)
goto out;
}
if (st->ct) {
+ char *buf;
+ size_t sz;
int ret;
if (st->ct->task.error < 0) {
if (st->ct->task.error != -E_TASK_UNREGISTERED)
}
if (st->ct->status != CL_RECEIVING)
goto out;
- ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
- update_item);
+ ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
+ if (ret <= 0)
+ goto out;
+ sz = btr_next_buffer(st->btrn, &buf);
+ ret = for_each_stat_item(buf, sz, update_item);
if (ret < 0) {
- st->ct->task.error = ret;
+ kill_btrn(st->ct->btrn, &st->ct->task, ret);
goto out;
}
- if (st->ct->loaded != ret) {
+ if (sz != ret)
st->last_status_read = *now;
- st->ct->loaded = ret;
- } else {
+ else {
struct timeval diff;
tv_diff(now, &st->last_status_read, &diff);
if (diff.tv_sec > 61)
- st->ct->task.error = -E_STATUS_TIMEOUT;
+ kill_btrn(st->ct->btrn, &st->ct->task,
+ -E_STATUS_TIMEOUT);
}
+ btr_consume(st->btrn, sz - ret);
goto out;
}
if (tv_diff(now, &st->restart_barrier, NULL) < 0)
int argc = 5;
PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
st->clock_diff_count--;
- client_open(argc, argv, &st->ct, NULL);
+ client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
set_stat_task_restart_barrier(2);
- sched_min_delay(s);
} else {
char *argv[] = {"audiod", "--", "stat", "-p", NULL};
int argc = 4;
- client_open(argc, argv, &st->ct, NULL);
+ client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
set_stat_task_restart_barrier(5);
- sched_min_delay(s);
}
free(stat_item_values[SI_BASENAME]);
stat_item_values[SI_BASENAME] = para_strdup(
stat_client_write_item(SI_BASENAME);
st->last_status_read = *now;
out:
- start_stop_decoders(s);
+ start_stop_decoders();
}
static void init_status_task(struct status_task *st)
{
memset(st, 0, sizeof(struct status_task));
st->task.pre_select = status_pre_select;
+ st->task.post_select = status_post_select;
st->sa_time_diff_sign = 1;
st->clock_diff_count = conf.clock_diff_count_arg;
st->current_audio_format_num = -1;
- sprintf(st->task.status, "status task");
+ sprintf(st->task.status, "stat");
+ st->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = "stat"));
}
static void set_initial_status(void)
projects / paraslash.git / blobdiff