media/libvpx/vpx_ports/mem.h@b8a032363ba2 (annotated)
media/libvpx/vpx_ports/mem.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license |
| michael@0 | 5 | * that can be found in the LICENSE file in the root of the source |
| michael@0 | 6 | * tree. An additional intellectual property rights grant can be found |
| michael@0 | 7 | * in the file PATENTS. All contributing project authors may |
| michael@0 | 8 | * be found in the AUTHORS file in the root of the source tree. |
| michael@0 | 9 | */ |
| michael@0 | 10 | |
| michael@0 | 11 | |
| michael@0 | 12 | #ifndef VPX_PORTS_MEM_H |
| michael@0 | 13 | #define VPX_PORTS_MEM_H |
| michael@0 | 14 | |
| michael@0 | 15 | #include "vpx_config.h" |
| michael@0 | 16 | #include "vpx/vpx_integer.h" |
| michael@0 | 17 | |
| michael@0 | 18 | #if (defined(__GNUC__) && __GNUC__) || defined(__SUNPRO_C) |
| michael@0 | 19 | #define DECLARE_ALIGNED(n,typ,val) typ val __attribute__ ((aligned (n))) |
| michael@0 | 20 | #elif defined(_MSC_VER) |
| michael@0 | 21 | #define DECLARE_ALIGNED(n,typ,val) __declspec(align(n)) typ val |
| michael@0 | 22 | #else |
| michael@0 | 23 | #warning No alignment directives known for this compiler. |
| michael@0 | 24 | #define DECLARE_ALIGNED(n,typ,val) typ val |
| michael@0 | 25 | #endif |
| michael@0 | 26 | #endif |
| michael@0 | 27 | |
| michael@0 | 28 | |
| michael@0 | 29 | /* Declare an aligned array on the stack, for situations where the stack |
| michael@0 | 30 | * pointer may not have the alignment we expect. Creates an array with a |
| michael@0 | 31 | * modified name, then defines val to be a pointer, and aligns that pointer |
| michael@0 | 32 | * within the array. |
| michael@0 | 33 | */ |
| michael@0 | 34 | #define DECLARE_ALIGNED_ARRAY(a,typ,val,n)\ |
| michael@0 | 35 | typ val##_[(n)+(a)/sizeof(typ)+1];\ |
| michael@0 | 36 | typ *val = (typ*)((((intptr_t)val##_)+(a)-1)&((intptr_t)-(a))) |
| michael@0 | 37 | |
| michael@0 | 38 | |
| michael@0 | 39 | /* Indicates that the usage of the specified variable has been audited to assure |
| michael@0 | 40 | * that it's safe to use uninitialized. Silences 'may be used uninitialized' |
| michael@0 | 41 | * warnings on gcc. |
| michael@0 | 42 | */ |
| michael@0 | 43 | #if defined(__GNUC__) && __GNUC__ |
| michael@0 | 44 | #define UNINITIALIZED_IS_SAFE(x) x=x |
| michael@0 | 45 | #else |
| michael@0 | 46 | #define UNINITIALIZED_IS_SAFE(x) x |
| michael@0 | 47 | #endif |
