/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-

 *

 * Copyright (C) 2012,2015 Colin Walters <walters@verbum.org>.

 *

 * This library 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 of the License, or (at your option) any later version.

 *

 * This library 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 library; if not, write to the

 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

#pragma once

#include <gio/gio.h>

#include <errno.h>

G_BEGIN_DECLS

/**

 * glnx_unref_object:

 *

 * Call g_object_unref() on a variable location when it goes out of

 * scope.  Note that unlike g_object_unref(), the variable may be

 * %NULL.

 */

#define glnx_unref_object __attribute__ ((cleanup(glnx_local_obj_unref)))

static inline void

glnx_local_obj_unref (void *v)

{

  GObject *o = *(GObject **)v;

  if (o)

    g_object_unref (o);

}

#define glnx_unref_object __attribute__ ((cleanup(glnx_local_obj_unref)))

static inline int

glnx_steal_fd (int *fdp)

{

  int fd = *fdp;

  *fdp = -1;

  return fd;

}

/**

 * glnx_close_fd:

 * @fdp: Pointer to fd

 *

 * Effectively `close (glnx_steal_fd (&fd))`.  Also

 * asserts that `close()` did not raise `EBADF` - encountering

 * that error is usually a critical bug in the program.

 */

static inline void

glnx_close_fd (int *fdp)

{

  int errsv;

  g_assert (fdp);

  int fd = glnx_steal_fd (fdp);

  if (fd >= 0)

    {

      errsv = errno;

      if (close (fd) < 0)

        g_assert (errno != EBADF);

      errno = errsv;

    }

}

/**

 * glnx_fd_close:

 *

 * Deprecated in favor of `glnx_autofd`.

 */

#define glnx_fd_close __attribute__((cleanup(glnx_close_fd)))

/**

 * glnx_autofd:

 *

 * Call close() on a variable location when it goes out of scope.

 */

#define glnx_autofd __attribute__((cleanup(glnx_close_fd)))

G_END_DECLS