Magic Lantern / compiler.h

#ifndef _compiler_h_
#define _compiler_h_

/** \file
 * gcc specific hacks and defines.
 * Both host and ARM.

 * Copyright (C) 2009 Trammell Hudson <>
 * 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
 * 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.

/** Compile time failure if a structure is not sized correctly */
#define SIZE_CHECK_STRUCT( struct_name, size ) \
	static uint8_t __attribute__((unused)) \
	__size_check_##struct_name[ \
		sizeof( struct struct_name ) == size ? 0 : -1 \

/** Packed structures */
#define PACKED __attribute__((packed))

/** Force a variable to live in the text segment */
#define TEXT __attribute__((section(".text")))

/** Flag an argument as unused */
#define UNUSED(x) __attribute__((unused)) x

/** NULL pointer */
#define NULL	((void*) 0)

/** We don't have free yet */
static inline void free( const void * x ) { x = 0; }

extern void * malloc( unsigned len );

/** Compute the number of entries in a static array */
#define COUNT(x)	(sizeof(x)/sizeof((x)[0]))

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