1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libspeex_resampler/src/stack_alloc.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,116 @@
1.4 +/* Copyright (C) 2002 Jean-Marc Valin */
1.5 +/**
1.6 + @file stack_alloc.h
1.7 + @brief Temporary memory allocation on stack
1.8 +*/
1.9 +/*
1.10 + Redistribution and use in source and binary forms, with or without
1.11 + modification, are permitted provided that the following conditions
1.12 + are met:
1.13 +
1.14 + - Redistributions of source code must retain the above copyright
1.15 + notice, this list of conditions and the following disclaimer.
1.16 +
1.17 + - Redistributions in binary form must reproduce the above copyright
1.18 + notice, this list of conditions and the following disclaimer in the
1.19 + documentation and/or other materials provided with the distribution.
1.20 +
1.21 + - Neither the name of the Xiph.org Foundation nor the names of its
1.22 + contributors may be used to endorse or promote products derived from
1.23 + this software without specific prior written permission.
1.24 +
1.25 + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.26 + ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.27 + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.28 + A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
1.29 + CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.30 + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.31 + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.32 + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.33 + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.34 + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.35 + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.36 +*/
1.37 +
1.38 +#ifndef STACK_ALLOC_H
1.39 +#define STACK_ALLOC_H
1.40 +
1.41 +#ifdef WIN32
1.42 +# include <malloc.h>
1.43 +# ifndef alloca
1.44 +# define alloca(_x) _alloca(_x);
1.45 +# endif
1.46 +#else
1.47 +#ifdef HAVE_ALLOCA_H
1.48 +# include <alloca.h>
1.49 +# else
1.50 +# include <stdlib.h>
1.51 +# endif
1.52 +#endif
1.53 +
1.54 +/**
1.55 + * @def ALIGN(stack, size)
1.56 + *
1.57 + * Aligns the stack to a 'size' boundary
1.58 + *
1.59 + * @param stack Stack
1.60 + * @param size New size boundary
1.61 + */
1.62 +
1.63 +/**
1.64 + * @def PUSH(stack, size, type)
1.65 + *
1.66 + * Allocates 'size' elements of type 'type' on the stack
1.67 + *
1.68 + * @param stack Stack
1.69 + * @param size Number of elements
1.70 + * @param type Type of element
1.71 + */
1.72 +
1.73 +/**
1.74 + * @def VARDECL(var)
1.75 + *
1.76 + * Declare variable on stack
1.77 + *
1.78 + * @param var Variable to declare
1.79 + */
1.80 +
1.81 +/**
1.82 + * @def ALLOC(var, size, type)
1.83 + *
1.84 + * Allocate 'size' elements of 'type' on stack
1.85 + *
1.86 + * @param var Name of variable to allocate
1.87 + * @param size Number of elements
1.88 + * @param type Type of element
1.89 + */
1.90 +
1.91 +#ifdef ENABLE_VALGRIND
1.92 +
1.93 +#include <valgrind/memcheck.h>
1.94 +
1.95 +#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
1.96 +
1.97 +#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))))
1.98 +
1.99 +#else
1.100 +
1.101 +#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
1.102 +
1.103 +#define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type))))
1.104 +
1.105 +#endif
1.106 +
1.107 +#if defined(VAR_ARRAYS)
1.108 +#define VARDECL(var)
1.109 +#define ALLOC(var, size, type) type var[size]
1.110 +#elif defined(USE_ALLOCA)
1.111 +#define VARDECL(var) var
1.112 +#define ALLOC(var, size, type) var = alloca(sizeof(type)*(size))
1.113 +#else
1.114 +#define VARDECL(var) var
1.115 +#define ALLOC(var, size, type) var = PUSH(stack, size, type)
1.116 +#endif
1.117 +
1.118 +
1.119 +#endif
