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Updated stack_alloc.h

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This commit is contained in:
Chris Moeller 2015-01-21 18:03:06 -08:00
parent a4f8a09541
commit 2cafa1a676
1 changed files with 60 additions and 61 deletions
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69
src/stack_alloc.h
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@ -1,8 +1,9 @@
/* Copyright (C) 2002 Jean-Marc Valin */
/* Copyright (C) 2002-2003 Jean-Marc Valin
Copyright (C) 2007-2009 Xiph.Org Foundation */
/**
@file stack_alloc.h
@brief Temporary memory allocation on stack
*/
*/
/*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
@ -15,34 +16,36 @@
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
*/
#ifndef STACK_ALLOC_H
#define STACK_ALLOC_H
#ifdef WIN32
#if (!defined (VAR_ARRAYS) && !defined (USE_ALLOCA))
#error "Vgmstream requires one of VAR_ARRAYS or USE_ALLOCA be defined to select the temporary allocation mode."
#endif
#ifdef USE_ALLOCA
# ifdef WIN32
# include <malloc.h>
#else
# else
# ifdef HAVE_ALLOCA_H
# include <alloca.h>
# else
# include <stdlib.h>
# endif
# endif
#endif
/**
@ -82,32 +85,28 @@
* @param type Type of element
*/
#ifdef ENABLE_VALGRIND
#include <valgrind/memcheck.h>
#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
#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))))
#else
#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
#define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type))))
#endif
#if defined(VAR_ARRAYS)
#define VARDECL(var)
#define VARDECL(type, var)
#define ALLOC(var, size, type) type var[size]
#define SAVE_STACK
#define RESTORE_STACK
#define ALLOC_STACK
#elif defined(USE_ALLOCA)
#define VARDECL(var) var
#define ALLOC(var, size, type) var = alloca(sizeof(type)*(size))
#else
#define VARDECL(var) var
#define ALLOC(var, size, type) var = PUSH(stack, size, type)
#endif
#define VARDECL(type, var) type *var
#endif
# ifdef WIN32
# define ALLOC(var, size, type) var = ((type*)_alloca(sizeof(type)*(size)))
# else
# define ALLOC(var, size, type) var = ((type*)alloca(sizeof(type)*(size)))
# endif
#define SAVE_STACK
#define RESTORE_STACK
#define ALLOC_STACK
#endif /* VAR_ARRAYS */
#endif /* STACK_ALLOC_H */