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comparison: media/libopus/celt/stack_alloc.h
media/libopus/celt/stack_alloc.h
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- TOR_BUG_9701
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| -1:000000000000 | 0:23bf6035b413 |
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| 1 /* Copyright (C) 2002-2003 Jean-Marc Valin | |
| 2 Copyright (C) 2007-2009 Xiph.Org Foundation */ | |
| 3 /** | |
| 4 @file stack_alloc.h | |
| 5 @brief Temporary memory allocation on stack | |
| 6 */ | |
| 7 /* | |
| 8 Redistribution and use in source and binary forms, with or without | |
| 9 modification, are permitted provided that the following conditions | |
| 10 are met: | |
| 11 | |
| 12 - Redistributions of source code must retain the above copyright | |
| 13 notice, this list of conditions and the following disclaimer. | |
| 14 | |
| 15 - Redistributions in binary form must reproduce the above copyright | |
| 16 notice, this list of conditions and the following disclaimer in the | |
| 17 documentation and/or other materials provided with the distribution. | |
| 18 | |
| 19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 20 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
| 23 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 24 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 25 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 26 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 27 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 28 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 29 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 30 */ | |
| 31 | |
| 32 #ifndef STACK_ALLOC_H | |
| 33 #define STACK_ALLOC_H | |
| 34 | |
| 35 #include "opus_types.h" | |
| 36 #include "opus_defines.h" | |
| 37 | |
| 38 #if (!defined (VAR_ARRAYS) && !defined (USE_ALLOCA) && !defined (NONTHREADSAFE_PSEUDOSTACK)) | |
| 39 #error "Opus requires one of VAR_ARRAYS, USE_ALLOCA, or NONTHREADSAFE_PSEUDOSTACK be defined to select the temporary allocation mode." | |
| 40 #endif | |
| 41 | |
| 42 #ifdef USE_ALLOCA | |
| 43 # ifdef WIN32 | |
| 44 # include <malloc.h> | |
| 45 # else | |
| 46 # ifdef HAVE_ALLOCA_H | |
| 47 # include <alloca.h> | |
| 48 # else | |
| 49 # include <stdlib.h> | |
| 50 # endif | |
| 51 # endif | |
| 52 #endif | |
| 53 | |
| 54 /** | |
| 55 * @def ALIGN(stack, size) | |
| 56 * | |
| 57 * Aligns the stack to a 'size' boundary | |
| 58 * | |
| 59 * @param stack Stack | |
| 60 * @param size New size boundary | |
| 61 */ | |
| 62 | |
| 63 /** | |
| 64 * @def PUSH(stack, size, type) | |
| 65 * | |
| 66 * Allocates 'size' elements of type 'type' on the stack | |
| 67 * | |
| 68 * @param stack Stack | |
| 69 * @param size Number of elements | |
| 70 * @param type Type of element | |
| 71 */ | |
| 72 | |
| 73 /** | |
| 74 * @def VARDECL(var) | |
| 75 * | |
| 76 * Declare variable on stack | |
| 77 * | |
| 78 * @param var Variable to declare | |
| 79 */ | |
| 80 | |
| 81 /** | |
| 82 * @def ALLOC(var, size, type) | |
| 83 * | |
| 84 * Allocate 'size' elements of 'type' on stack | |
| 85 * | |
| 86 * @param var Name of variable to allocate | |
| 87 * @param size Number of elements | |
| 88 * @param type Type of element | |
| 89 */ | |
| 90 | |
| 91 #if defined(VAR_ARRAYS) | |
| 92 | |
| 93 #define VARDECL(type, var) | |
| 94 #define ALLOC(var, size, type) type var[size] | |
| 95 #define SAVE_STACK | |
| 96 #define RESTORE_STACK | |
| 97 #define ALLOC_STACK | |
| 98 /* C99 does not allow VLAs of size zero */ | |
| 99 #define ALLOC_NONE 1 | |
| 100 | |
| 101 #elif defined(USE_ALLOCA) | |
| 102 | |
| 103 #define VARDECL(type, var) type *var | |
| 104 | |
| 105 # ifdef WIN32 | |
| 106 # define ALLOC(var, size, type) var = ((type*)_alloca(sizeof(type)*(size))) | |
| 107 # else | |
| 108 # define ALLOC(var, size, type) var = ((type*)alloca(sizeof(type)*(size))) | |
| 109 # endif | |
| 110 | |
| 111 #define SAVE_STACK | |
| 112 #define RESTORE_STACK | |
| 113 #define ALLOC_STACK | |
| 114 #define ALLOC_NONE 0 | |
| 115 | |
| 116 #else | |
| 117 | |
| 118 #ifdef CELT_C | |
| 119 char *global_stack=0; | |
| 120 #else | |
| 121 extern char *global_stack; | |
| 122 #endif /* CELT_C */ | |
| 123 | |
| 124 #ifdef ENABLE_VALGRIND | |
| 125 | |
| 126 #include <valgrind/memcheck.h> | |
| 127 | |
| 128 #ifdef CELT_C | |
| 129 char *global_stack_top=0; | |
| 130 #else | |
| 131 extern char *global_stack_top; | |
| 132 #endif /* CELT_C */ | |
| 133 | |
| 134 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) | |
| 135 #define PUSH(stack, size, type) (VALGRIND_MAKE_MEM_NOACCESS(stack, global_stack_top-stack),ALIGN((stack),sizeof(type)/sizeof(char)),VALGRIND_MAKE_MEM_UNDEFINED(stack, ((size)*sizeof(type)/sizeof(char))),(stack)+=(2*(size)*sizeof(type)/sizeof(char)),(type*)((stack)-(2*(size)*sizeof(type)/sizeof(char)))) | |
| 136 #define RESTORE_STACK ((global_stack = _saved_stack),VALGRIND_MAKE_MEM_NOACCESS(global_stack, global_stack_top-global_stack)) | |
| 137 #define ALLOC_STACK char *_saved_stack; ((global_stack = (global_stack==0) ? ((global_stack_top=opus_alloc_scratch(GLOBAL_STACK_SIZE*2)+(GLOBAL_STACK_SIZE*2))-(GLOBAL_STACK_SIZE*2)) : global_stack),VALGRIND_MAKE_MEM_NOACCESS(global_stack, global_stack_top-global_stack)); _saved_stack = global_stack; | |
| 138 | |
| 139 #else | |
| 140 | |
| 141 #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) | |
| 142 #define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)/sizeof(char)),(stack)+=(size)*(sizeof(type)/sizeof(char)),(type*)((stack)-(size)*(sizeof(type)/sizeof(char)))) | |
| 143 #define RESTORE_STACK (global_stack = _saved_stack) | |
| 144 #define ALLOC_STACK char *_saved_stack; (global_stack = (global_stack==0) ? opus_alloc_scratch(GLOBAL_STACK_SIZE) : global_stack); _saved_stack = global_stack; | |
| 145 | |
| 146 #endif /* ENABLE_VALGRIND */ | |
| 147 | |
| 148 #include "os_support.h" | |
| 149 #define VARDECL(type, var) type *var | |
| 150 #define ALLOC(var, size, type) var = PUSH(global_stack, size, type) | |
| 151 #define SAVE_STACK char *_saved_stack = global_stack; | |
| 152 #define ALLOC_NONE 0 | |
| 153 | |
| 154 #endif /* VAR_ARRAYS */ | |
| 155 | |
| 156 | |
| 157 #ifdef ENABLE_VALGRIND | |
| 158 | |
| 159 #include <valgrind/memcheck.h> | |
| 160 #define OPUS_CHECK_ARRAY(ptr, len) VALGRIND_CHECK_MEM_IS_DEFINED(ptr, len*sizeof(*ptr)) | |
| 161 #define OPUS_CHECK_VALUE(value) VALGRIND_CHECK_VALUE_IS_DEFINED(value) | |
| 162 #define OPUS_CHECK_ARRAY_COND(ptr, len) VALGRIND_CHECK_MEM_IS_DEFINED(ptr, len*sizeof(*ptr)) | |
| 163 #define OPUS_CHECK_VALUE_COND(value) VALGRIND_CHECK_VALUE_IS_DEFINED(value) | |
| 164 #define OPUS_PRINT_INT(value) do {fprintf(stderr, #value " = %d at %s:%d\n", value, __FILE__, __LINE__);}while(0) | |
| 165 #define OPUS_FPRINTF fprintf | |
| 166 | |
| 167 #else | |
| 168 | |
| 169 static OPUS_INLINE int _opus_false(void) {return 0;} | |
| 170 #define OPUS_CHECK_ARRAY(ptr, len) _opus_false() | |
| 171 #define OPUS_CHECK_VALUE(value) _opus_false() | |
| 172 #define OPUS_PRINT_INT(value) do{}while(0) | |
| 173 #define OPUS_FPRINTF (void) | |
| 174 | |
| 175 #endif | |
| 176 | |
| 177 | |
| 178 #endif /* STACK_ALLOC_H */ |
