const char *writer_names[] ={WRITER_NAMES};
struct writer writers[NUM_SUPPORTED_WRITERS] = {WRITER_ARRAY};
-static void wng_post_select(__a_unused struct sched *s, struct task *t)
+static void wng_pre_select(__a_unused struct sched *s, struct task *t)
+{
+ struct writer_node_group *g = t->private_data;
+ int i;
+
+ FOR_EACH_WRITER_NODE(i, g) {
+ struct writer_node *wn = &g->writer_nodes[i];
+ t->ret = wn->writer->pre_select(s, wn);
+ if (t->ret < 0) {
+ g->eof = 1;
+ return;
+ }
+ }
+}
+
+static void wng_post_select(struct sched *s, struct task *t)
{
struct writer_node_group *g = t->private_data;
int i;
FOR_EACH_WRITER_NODE(i, g) {
struct writer_node *wn = &g->writer_nodes[i];
- t->ret = wn->task.ret;
+ t->ret = wn->writer->post_select(s, wn);
if (t->ret < 0) {
g->eof = 1;
return;
int i, ret = 1;
PARA_NOTICE_LOG("opening wng %p with %d writer(s)\n", g, g->num_writers);
+ register_task(&g->task);
FOR_EACH_WRITER_NODE(i, g) {
struct writer_node *wn = &g->writer_nodes[i];
wn->wng = g;
ret = wn->writer->open(wn);
if (ret < 0)
- goto out;
+ goto err_out;
wn->chunk_bytes = ret;
g->max_chunk_bytes = PARA_MAX(g->max_chunk_bytes, ret);
- wn->task.pre_select = wn->writer->pre_select;
- wn->task.post_select = wn->writer->post_select;
- wn->task.private_data = wn;
- register_task(&wn->task);
}
sprintf(g->task.status, "%s", "writer node group");
g->eof = 0;
- register_task(&g->task);
-out:
+ return 1;
+err_out:
+ unregister_task(&g->task);
+ while (i > 0) {
+ struct writer_node *wn = &g->writer_nodes[--i];
+ wn->writer->close(wn);
+ }
+ g->num_writers = 0;
+ g->eof = 1;
return ret;
}
void wng_unregister(struct writer_node_group *g)
{
- int i;
-
- FOR_EACH_WRITER_NODE(i, g) {
- struct writer_node *wn = &g->writer_nodes[i];
- unregister_task(&wn->task);
- }
unregister_task(&g->task);
g->eof = 1;
}
g->written = para_calloc(num_writers * sizeof(size_t));
g->task.private_data = g;
g->task.post_select = wng_post_select;
- g->task.flags = POST_ADD_TAIL;
+ g->task.pre_select = wng_pre_select;
return g;
}
else
default_writer = 1;
wng->writer_nodes[0].writer = &writers[default_writer];
- sprintf(wng->writer_nodes[0].task.status, "%s",
- writer_names[default_writer]);
PARA_INFO_LOG("using default writer: %s %p\n",
writer_names[default_writer], writers[default_writer].parse_config);
wng->writer_nodes[0].conf = writers[default_writer].parse_config("");