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 119char *global_stack=0; 120#else 121extern char *global_stack; 122#endif /* CELT_C */ 123 124#ifdef ENABLE_VALGRIND 125 126#include <valgrind/memcheck.h> 127 128#ifdef CELT_C 129char *global_stack_top=0; 130#else 131extern 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 169static 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 */ 179