/*

 * Copyright (c) 2004 Andrey Panin <pazke@donpac.ru>

 *

 * This software is released under the MIT license.

 */

#include "lib.h"

#include "ioloop-private.h"

#include "ioloop-iolist.h"

bool ioloop_iolist_add(struct io_list *list, struct io_file *io)

{

  int i, idx;

  if ((io->io.condition & IO_READ) != 0)

    idx = IOLOOP_IOLIST_INPUT;

  else if ((io->io.condition & IO_WRITE) != 0)

    idx = IOLOOP_IOLIST_OUTPUT;

  else if ((io->io.condition & IO_ERROR) != 0)

    idx = IOLOOP_IOLIST_ERROR;

  else {

    i_unreached();

  }

  if (list->ios[idx] != NULL) {

    i_panic("io_add(0x%x) called twice fd=%d, callback=%p -> %p",

      io->io.condition, io->fd, list->ios[idx]->io.callback,

      io->io.callback);

  }

  i_assert(list->ios[idx] == NULL);

  list->ios[idx] = io;

  /* check if this was the first one */

  for (i = 0; i < IOLOOP_IOLIST_IOS_PER_FD; i++) {

    if (i != idx && list->ios[i] != NULL)

      return FALSE;

  }

  return TRUE;

}

bool ioloop_iolist_del(struct io_list *list, struct io_file *io)

{

  bool last = TRUE;

  int i;

  for (i = 0; i < IOLOOP_IOLIST_IOS_PER_FD; i++) {

    if (list->ios[i] != NULL) {

      if (list->ios[i] == io)

        list->ios[i] = NULL;

      else

        last = FALSE;

    }

  }

  return last;

}