1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vpx_ports/mem.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,47 @@
1.4 +/*
1.5 + * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +
1.15 +#ifndef VPX_PORTS_MEM_H
1.16 +#define VPX_PORTS_MEM_H
1.17 +
1.18 +#include "vpx_config.h"
1.19 +#include "vpx/vpx_integer.h"
1.20 +
1.21 +#if (defined(__GNUC__) && __GNUC__) || defined(__SUNPRO_C)
1.22 +#define DECLARE_ALIGNED(n,typ,val) typ val __attribute__ ((aligned (n)))
1.23 +#elif defined(_MSC_VER)
1.24 +#define DECLARE_ALIGNED(n,typ,val) __declspec(align(n)) typ val
1.25 +#else
1.26 +#warning No alignment directives known for this compiler.
1.27 +#define DECLARE_ALIGNED(n,typ,val) typ val
1.28 +#endif
1.29 +#endif
1.30 +
1.31 +
1.32 +/* Declare an aligned array on the stack, for situations where the stack
1.33 + * pointer may not have the alignment we expect. Creates an array with a
1.34 + * modified name, then defines val to be a pointer, and aligns that pointer
1.35 + * within the array.
1.36 + */
1.37 +#define DECLARE_ALIGNED_ARRAY(a,typ,val,n)\
1.38 + typ val##_[(n)+(a)/sizeof(typ)+1];\
1.39 + typ *val = (typ*)((((intptr_t)val##_)+(a)-1)&((intptr_t)-(a)))
1.40 +
1.41 +
1.42 +/* Indicates that the usage of the specified variable has been audited to assure
1.43 + * that it's safe to use uninitialized. Silences 'may be used uninitialized'
1.44 + * warnings on gcc.
1.45 + */
1.46 +#if defined(__GNUC__) && __GNUC__
1.47 +#define UNINITIALIZED_IS_SAFE(x) x=x
1.48 +#else
1.49 +#define UNINITIALIZED_IS_SAFE(x) x
1.50 +#endif
