/*

 * Copyright (c) 2020 Red Hat, Inc.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

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

 * 

 * This program 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 General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

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

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA. 

 *

 * $Id: //eng/uds-releases/jasper/src/uds/compiler.h#1 $

 */

#ifndef COMMON_COMPILER_H

#define COMMON_COMPILER_H

#include "compilerDefs.h"

// Count the elements in a static array while attempting to catch some type

// errors. (See http://stackoverflow.com/a/1598827 for an explanation.)

#define COUNT_OF(x) ((sizeof(x) / sizeof(0[x])) \

                     / ((size_t) (!(sizeof(x) % sizeof(0[x])))))

#define const_container_of(ptr, type, member)                     \

  __extension__ ({                                                \

    const __typeof__(((type *)0)->member) *__mptr = (ptr);        \

    (const type *)((const char *)__mptr - offsetof(type,member)); \

  })

// The "inline" keyword alone takes affect only when the optimization level

// is high enough.  Define INLINE to force the gcc to "always inline".

#define INLINE __attribute__((always_inline)) inline

#endif /* COMMON_COMPILER_H */