The Tor Browser / file comparison
comparison: media/libspeex_resampler/src/stack_alloc.h
media/libspeex_resampler/src/stack_alloc.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:b4160fef30af |
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| 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: | |
| 10 | |
| 11 - Redistributions of source code must retain the above copyright | |
| 12 notice, this list of conditions and the following disclaimer. | |
| 13 | |
| 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. | |
| 17 | |
| 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. | |
| 21 | |
| 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 */ | |
| 34 | |
| 35 #ifndef STACK_ALLOC_H | |
| 36 #define STACK_ALLOC_H | |
| 37 | |
| 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 | |
| 50 | |
| 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 */ | |
| 59 | |
| 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 */ | |
| 69 | |
| 70 /** | |
| 71 * @def VARDECL(var) | |
| 72 * | |
| 73 * Declare variable on stack | |
| 74 * | |
| 75 * @param var Variable to declare | |
| 76 */ | |
| 77 | |
| 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 */ | |
| 87 | |
| 88 #ifdef ENABLE_VALGRIND | |
| 89 | |
| 90 #include <valgrind/memcheck.h> | |
| 91 | |
| 92 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) | |
| 93 | |
| 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)))) | |
| 95 | |
| 96 #else | |
| 97 | |
| 98 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) | |
| 99 | |
| 100 #define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type)))) | |
| 101 | |
| 102 #endif | |
| 103 | |
| 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 | |
| 114 | |
| 115 | |
| 116 #endif |
