/* wait-user.c

   Copyright (C) 2000 Werner Koch (dd9jn)

   Copyright (C) 2001, 2002, 2003, 2004, 2005 g10 Code GmbH

   This file is part of GPGME.

   GPGME is free software; you can redistribute it and/or modify it

   under the terms of the GNU Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 of

   the License, or (at your option) any later version.

   GPGME is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA

   02111-1307, USA.  */

#if HAVE_CONFIG_H

#include <config.h>

#endif

#include <assert.h>

#include "gpgme.h"

#include "context.h"

#include "priv-io.h"

#include "wait.h"

#include "ops.h"

#include "debug.h"

/* The user event loops are used for all asynchronous operations for

   which a user callback is defined.  */

/* Internal I/O Callbacks.  */

gpgme_error_t

_gpgme_user_io_cb_handler (void *data, int fd)

{

  gpgme_error_t err = 0;

  gpgme_error_t op_err = 0;

  struct tag *tag = (struct tag *) data;

  gpgme_ctx_t ctx;

  (void)fd;

  assert (data);

  ctx = tag->ctx;

  assert (ctx);

  LOCK (ctx->lock);

  if (ctx->canceled)

    err = gpg_error (GPG_ERR_CANCELED);

  UNLOCK (ctx->lock);

  if (! err)

    err = _gpgme_run_io_cb (&ctx->fdt.fds[tag->idx], 0, &op_err);

  if (err || op_err)

    _gpgme_cancel_with_err (ctx, err, op_err);

  else

    {

      unsigned int i;

      for (i = 0; i < ctx->fdt.size; i++)

	if (ctx->fdt.fds[i].fd != -1)

	  break;

      if (i == ctx->fdt.size)

	{

	  struct gpgme_io_event_done_data done_data;

	  done_data.err = 0;

	  done_data.op_err = 0;

	  _gpgme_engine_io_event (ctx->engine, GPGME_EVENT_DONE, &done_data);

	}

    }

  return 0;

}

/* Register the file descriptor FD with the handler FNC (which gets

   FNC_DATA as its first argument) for the direction DIR.  DATA should

   be the context for which the fd is added.  R_TAG will hold the tag

   that can be used to remove the fd.  */

gpgme_error_t

_gpgme_wait_user_add_io_cb (void *data, int fd, int dir, gpgme_io_cb_t fnc,

			    void *fnc_data, void **r_tag)

{

  gpgme_ctx_t ctx = (gpgme_ctx_t) data;

  struct tag *tag;

  gpgme_error_t err;

  assert (ctx);

  err = _gpgme_add_io_cb (data, fd, dir, fnc, fnc_data, r_tag);

  if (err)

    return err;

  tag = *r_tag;

  assert (tag);

  err = (*ctx->io_cbs.add) (ctx->io_cbs.add_priv, fd, dir,

			    _gpgme_user_io_cb_handler, *r_tag,

			    &tag->user_tag);

  if (err)

    _gpgme_remove_io_cb (*r_tag);

  return err;

}

void

_gpgme_wait_user_remove_io_cb (void *data)

{

  struct tag *tag = (struct tag *) data;

  gpgme_ctx_t ctx;

  assert (tag);

  ctx = tag->ctx;

  (*ctx->io_cbs.remove) (tag->user_tag);

  _gpgme_remove_io_cb (data);

}

void

_gpgme_wait_user_event_cb (void *data, gpgme_event_io_t type, void *type_data)

{

  gpgme_ctx_t ctx = data;

  if (ctx->io_cbs.event)

    (*ctx->io_cbs.event) (ctx->io_cbs.event_priv, type, type_data);

}