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/*
* Copyright (c) 2009 Marko Kreen
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/** @file
* Random stuff that does not fit elsewhere.
*/
#ifndef _USUAL_MISC_H_
#define _USUAL_MISC_H_
#include <usual/base.h>
#ifdef WORDS_BIGENDIAN
#define FOURCC(a,b,c,d) \
( ((unsigned int)(unsigned char)(a) << 24) \
| ((unsigned int)(unsigned char)(b) << 16) \
| ((unsigned int)(unsigned char)(c) << 8) \
| ((unsigned int)(unsigned char)(d)))
#else
/** Four-byte identifier as integer */
#define FOURCC(a,b,c,d) \
( ((unsigned int)(unsigned char)(a)) \
| ((unsigned int)(unsigned char)(b) << 8) \
| ((unsigned int)(unsigned char)(c) << 16) \
| ((unsigned int)(unsigned char)(d) << 24))
#endif
#if defined(__i386__) || defined(__x86_64__)
#define mb() asm volatile("mfence":::"memory")
#define rmb() asm volatile("lfence":::"memory")
#define wmb() asm volatile("sfence":::"memory")
#endif
#endif
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