| /* |
| * Copyright (c) 2010 The VP8 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_integer.h" |
| |
| #if defined(__GNUC__) && __GNUC__ |
| #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 |
