ref: a160d72522fd8572943966e96b65dd232fe048ea
dir: /vpx_ports/mem.h/
/* * 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 /* 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 #if HAVE_NEON && defined(_MSC_VER) #define __builtin_prefetch(x) #endif #endif // VPX_PORTS_MEM_H_