media/libvpx/vpx_ports/mem.h@ac0c01689b40
media/libvpx/vpx_ports/mem.h
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /*
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
12 #ifndef VPX_PORTS_MEM_H
13 #define VPX_PORTS_MEM_H
15 #include "vpx_config.h"
16 #include "vpx/vpx_integer.h"
18 #if (defined(__GNUC__) && __GNUC__) || defined(__SUNPRO_C)
19 #define DECLARE_ALIGNED(n,typ,val) typ val __attribute__ ((aligned (n)))
20 #elif defined(_MSC_VER)
21 #define DECLARE_ALIGNED(n,typ,val) __declspec(align(n)) typ val
22 #else
23 #warning No alignment directives known for this compiler.
24 #define DECLARE_ALIGNED(n,typ,val) typ val
25 #endif
26 #endif
29 /* Declare an aligned array on the stack, for situations where the stack
30 * pointer may not have the alignment we expect. Creates an array with a
31 * modified name, then defines val to be a pointer, and aligns that pointer
32 * within the array.
33 */
34 #define DECLARE_ALIGNED_ARRAY(a,typ,val,n)\
35 typ val##_[(n)+(a)/sizeof(typ)+1];\
36 typ *val = (typ*)((((intptr_t)val##_)+(a)-1)&((intptr_t)-(a)))
39 /* Indicates that the usage of the specified variable has been audited to assure
40 * that it's safe to use uninitialized. Silences 'may be used uninitialized'
41 * warnings on gcc.
42 */
43 #if defined(__GNUC__) && __GNUC__
44 #define UNINITIALIZED_IS_SAFE(x) x=x
45 #else
46 #define UNINITIALIZED_IS_SAFE(x) x
47 #endif
