stdout.c

   1 #include "para.h"
   2 #include "string.h"
   3 #include "list.h"
   4 #include "sched.h"
   5 #include "fd.h"
   6 #include "error.h"
   7 #include "stdout.h"
   8
   9 void stdout_pre_select(struct sched *s, struct task *t)
  10 {
  11         struct stdout_task *sot = t->private_data;
  12
  13         t->ret = 1;
  14         sot->check_fd = 0;
  15         if (!*sot->loaded)
  16                 return;
  17         sot->check_fd = 1;
  18         para_fd_set(STDOUT_FILENO, &s->wfds, &s->max_fileno);
  19 }
  20
  21 void stdout_post_select(struct sched *s, struct task *t)
  22 {
  23         struct stdout_task *sot = t->private_data;
  24         ssize_t ret;
  25
  26         t->ret = 1;
  27         if (!sot->check_fd) {
  28                 if (*sot->eof)
  29                         t->ret = -E_STDOUT_EOF;
  30                 return;
  31         }
  32         if (!FD_ISSET(STDOUT_FILENO, &s->wfds))
  33                 return;
  34         t->ret = -E_STDOUT_WRITE;
  35         ret = write(STDOUT_FILENO, sot->buf, *sot->loaded);
  36         if (ret <= 0)
  37                 return;
  38         *sot->loaded -= ret;
  39         t->ret = 1;
  40 }
  41
  42 void stdout_default_event_handler(struct task *t)
  43 {
  44         PARA_NOTICE_LOG("%p: %s\n", t, PARA_STRERROR(-t->ret));
  45         unregister_task(t);
  46 }
  47
  48
  49 void stdout_set_defaults(struct stdout_task *sot)
  50 {
  51         sot->task.private_data = sot;
  52         sot->task.pre_select = stdout_pre_select;
  53         sot->task.post_select = stdout_post_select;
  54         sot->task.event_handler = stdout_default_event_handler;
  55         sot->task.flags = 0;
  56         sprintf(sot->task.status, "stdout writer");
  57 }