48 строки
1.5 KiB
C
48 строки
1.5 KiB
C
/*
|
|
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
|
|
#ifndef VPX_PORTS_MEM_H
|
|
#define VPX_PORTS_MEM_H
|
|
|
|
#include "vpx_config.h"
|
|
#include "vpx/vpx_integer.h"
|
|
|
|
#if (defined(__GNUC__) && __GNUC__) || defined(__SUNPRO_C)
|
|
#define DECLARE_ALIGNED(n,typ,val) typ val __attribute__ ((aligned (n)))
|
|
#elif defined(_MSC_VER)
|
|
#define DECLARE_ALIGNED(n,typ,val) __declspec(align(n)) typ val
|
|
#else
|
|
#warning No alignment directives known for this compiler.
|
|
#define DECLARE_ALIGNED(n,typ,val) typ val
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/* Declare an aligned array on the stack, for situations where the stack
|
|
* pointer may not have the alignment we expect. Creates an array with a
|
|
* modified name, then defines val to be a pointer, and aligns that pointer
|
|
* within the array.
|
|
*/
|
|
#define DECLARE_ALIGNED_ARRAY(a,typ,val,n)\
|
|
typ val##_[(n)+(a)/sizeof(typ)+1];\
|
|
typ *val = (typ*)((((intptr_t)val##_)+(a)-1)&((intptr_t)-(a)))
|
|
|
|
|
|
/* Indicates that the usage of the specified variable has been audited to assure
|
|
* that it's safe to use uninitialized. Silences 'may be used uninitialized'
|
|
* warnings on gcc.
|
|
*/
|
|
#if defined(__GNUC__) && __GNUC__
|
|
#define UNINITIALIZED_IS_SAFE(x) x=x
|
|
#else
|
|
#define UNINITIALIZED_IS_SAFE(x) x
|
|
#endif
|