media/libspeex_resampler/src/stack_alloc.h@6474c204b198
media/libspeex_resampler/src/stack_alloc.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /* Copyright (C) 2002 Jean-Marc Valin */
2 /**
3 @file stack_alloc.h
4 @brief Temporary memory allocation on stack
5 */
6 /*
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions
9 are met:
11 - Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
14 - Redistributions in binary form must reproduce the above copyright
15 notice, this list of conditions and the following disclaimer in the
16 documentation and/or other materials provided with the distribution.
18 - Neither the name of the Xiph.org Foundation nor the names of its
19 contributors may be used to endorse or promote products derived from
20 this software without specific prior written permission.
22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
35 #ifndef STACK_ALLOC_H
36 #define STACK_ALLOC_H
38 #ifdef WIN32
39 # include <malloc.h>
40 # ifndef alloca
41 # define alloca(_x) _alloca(_x);
42 # endif
43 #else
44 #ifdef HAVE_ALLOCA_H
45 # include <alloca.h>
46 # else
47 # include <stdlib.h>
48 # endif
49 #endif
51 /**
52 * @def ALIGN(stack, size)
53 *
54 * Aligns the stack to a 'size' boundary
55 *
56 * @param stack Stack
57 * @param size New size boundary
58 */
60 /**
61 * @def PUSH(stack, size, type)
62 *
63 * Allocates 'size' elements of type 'type' on the stack
64 *
65 * @param stack Stack
66 * @param size Number of elements
67 * @param type Type of element
68 */
70 /**
71 * @def VARDECL(var)
72 *
73 * Declare variable on stack
74 *
75 * @param var Variable to declare
76 */
78 /**
79 * @def ALLOC(var, size, type)
80 *
81 * Allocate 'size' elements of 'type' on stack
82 *
83 * @param var Name of variable to allocate
84 * @param size Number of elements
85 * @param type Type of element
86 */
88 #ifdef ENABLE_VALGRIND
90 #include <valgrind/memcheck.h>
92 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
94 #define PUSH(stack, size, type) (VALGRIND_MAKE_NOACCESS(stack, 1000),ALIGN((stack),sizeof(type)),VALGRIND_MAKE_WRITABLE(stack, ((size)*sizeof(type))),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type))))
96 #else
98 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
100 #define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type))))
102 #endif
104 #if defined(VAR_ARRAYS)
105 #define VARDECL(var)
106 #define ALLOC(var, size, type) type var[size]
107 #elif defined(USE_ALLOCA)
108 #define VARDECL(var) var
109 #define ALLOC(var, size, type) var = alloca(sizeof(type)*(size))
110 #else
111 #define VARDECL(var) var
112 #define ALLOC(var, size, type) var = PUSH(stack, size, type)
113 #endif
116 #endif
