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115 lines
3.3 KiB
115 lines
3.3 KiB
/* Copyright (C) 2002 Jean-Marc Valin */ |
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/** |
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@file stack_alloc.h |
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@brief Temporary memory allocation on stack |
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*/ |
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/* |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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- Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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- Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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- Neither the name of the Xiph.org Foundation nor the names of its |
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contributors may be used to endorse or promote products derived from |
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this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef STACK_ALLOC_H |
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#define STACK_ALLOC_H |
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#ifdef USE_ALLOCA |
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# ifdef WIN32 |
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# include <malloc.h> |
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# else |
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# ifdef HAVE_ALLOCA_H |
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# include <alloca.h> |
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# else |
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# include <stdlib.h> |
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# endif |
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# endif |
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#endif |
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/** |
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* @def ALIGN(stack, size) |
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* |
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* Aligns the stack to a 'size' boundary |
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* |
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* @param stack Stack |
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* @param size New size boundary |
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*/ |
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/** |
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* @def PUSH(stack, size, type) |
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* |
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* Allocates 'size' elements of type 'type' on the stack |
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* |
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* @param stack Stack |
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* @param size Number of elements |
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* @param type Type of element |
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*/ |
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/** |
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* @def VARDECL(var) |
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* |
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* Declare variable on stack |
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* |
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* @param var Variable to declare |
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*/ |
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/** |
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* @def ALLOC(var, size, type) |
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* |
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* Allocate 'size' elements of 'type' on stack |
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* |
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* @param var Name of variable to allocate |
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* @param size Number of elements |
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* @param type Type of element |
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*/ |
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#ifdef ENABLE_VALGRIND |
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#include <valgrind/memcheck.h> |
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#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) |
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#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)))) |
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#else |
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#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1)) |
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#define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type)))) |
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#endif |
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#if defined(VAR_ARRAYS) |
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#define VARDECL(var) |
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#define ALLOC(var, size, type) type var[size] |
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#elif defined(USE_ALLOCA) |
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#define VARDECL(var) var |
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#define ALLOC(var, size, type) var = alloca(sizeof(type)*(size)) |
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#else |
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#define VARDECL(var) var |
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#define ALLOC(var, size, type) var = PUSH(stack, size, type) |
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#endif |
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#endif
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