static void stdout_pre_select_btr(struct sched *s, struct task *t)
{
struct stdout_task *sot = container_of(t, struct stdout_task, task);
- size_t sz = btr_get_input_queue_size(sot->btrn);
+ int ret;
t->error = 0;
sot->check_fd = 0;
- if (sz == 0) {
- if (btr_no_parent(sot->btrn)) {
- s->timeout.tv_sec = 0;
- s->timeout.tv_usec = 1;
- }
- return;
+ ret = btr_node_status(sot->btrn, 0, BTR_NT_LEAF);
+ if (ret > 0)
+ para_fd_set(STDOUT_FILENO, &s->wfds, &s->max_fileno);
+ else if (ret < 0) {
+ s->timeout.tv_sec = 0;
+ s->timeout.tv_usec = 1;
}
- sot->check_fd = 1;
- para_fd_set(STDOUT_FILENO, &s->wfds, &s->max_fileno);
}
/**
static void stdout_post_select_btr(struct sched *s, struct task *t)
{
struct stdout_task *sot = container_of(t, struct stdout_task, task);
- ssize_t ret;
- size_t sz = btr_get_input_queue_size(sot->btrn);
+ struct btr_node *btrn = sot->btrn;
+ int ret;
char *buf;
+ size_t sz;
t->error = 0;
- if (!sot->check_fd) {
- if (sz == 0 && btr_no_parent(sot->btrn)) {
- t->error = -E_STDOUT_EOF;
- goto err;
- }
+ ret = btr_node_status(btrn, 0, BTR_NT_LEAF);
+ if (ret < 0)
+ goto err;
+ if (ret == 0)
return;
- }
if (!FD_ISSET(STDOUT_FILENO, &s->wfds))
return;
- sz = btr_next_buffer(sot->btrn, &buf);
- if (sz == 0)
- return;
+ sz = btr_next_buffer(btrn, &buf);
+ assert(sz > 0);
ret = write_nonblock(STDOUT_FILENO, buf, sz, 0);
- if (ret < 0) {
- t->error = -ERRNO_TO_PARA_ERROR(errno);
+ if (ret < 0)
goto err;
- }
- btr_consume(sot->btrn, ret);
+ btr_consume(btrn, ret);
return;
err:
- btr_remove_node(sot->btrn);
+ btr_remove_node(btrn);
+ t->error = ret;
}
/**
* Initialize a stdout task structure with default values.