mirror of
https://github.com/DrBeef/ioq3quest.git
synced 2024-11-24 04:51:25 +00:00
149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
/* 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
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
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 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
|
|
|
|
#if (!defined (VAR_ARRAYS) && !defined (USE_ALLOCA) && !defined (NONTHREADSAFE_PSEUDOSTACK))
|
|
#error "Opus requires one of VAR_ARRAYS, USE_ALLOCA, or NONTHREADSAFE_PSEUDOSTACK be defined to select the temporary allocation mode."
|
|
#endif
|
|
|
|
#ifdef USE_ALLOCA
|
|
# ifdef WIN32
|
|
# include <malloc.h>
|
|
# else
|
|
# ifdef HAVE_ALLOCA_H
|
|
# include <alloca.h>
|
|
# else
|
|
# include <stdlib.h>
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
/**
|
|
* @def ALIGN(stack, size)
|
|
*
|
|
* Aligns the stack to a 'size' boundary
|
|
*
|
|
* @param stack Stack
|
|
* @param size New size boundary
|
|
*/
|
|
|
|
/**
|
|
* @def PUSH(stack, size, type)
|
|
*
|
|
* Allocates 'size' elements of type 'type' on the stack
|
|
*
|
|
* @param stack Stack
|
|
* @param size Number of elements
|
|
* @param type Type of element
|
|
*/
|
|
|
|
/**
|
|
* @def VARDECL(var)
|
|
*
|
|
* Declare variable on stack
|
|
*
|
|
* @param var Variable to declare
|
|
*/
|
|
|
|
/**
|
|
* @def ALLOC(var, size, type)
|
|
*
|
|
* Allocate 'size' elements of 'type' on stack
|
|
*
|
|
* @param var Name of variable to allocate
|
|
* @param size Number of elements
|
|
* @param type Type of element
|
|
*/
|
|
|
|
#if defined(VAR_ARRAYS)
|
|
|
|
#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(type, var) type *var
|
|
|
|
# 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
|
|
|
|
#else
|
|
|
|
#ifdef CELT_C
|
|
char *global_stack=0;
|
|
#else
|
|
extern char *global_stack;
|
|
#endif /* CELT_C */
|
|
|
|
#ifdef ENABLE_VALGRIND
|
|
|
|
#include <valgrind/memcheck.h>
|
|
|
|
#ifdef CELT_C
|
|
char *global_stack_top=0;
|
|
#else
|
|
extern char *global_stack_top;
|
|
#endif /* CELT_C */
|
|
|
|
#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
|
|
#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))))
|
|
#define RESTORE_STACK ((global_stack = _saved_stack),VALGRIND_MAKE_MEM_NOACCESS(global_stack, global_stack_top-global_stack))
|
|
#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;
|
|
|
|
#else
|
|
|
|
#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
|
|
#define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)/sizeof(char)),(stack)+=(size)*(sizeof(type)/sizeof(char)),(type*)((stack)-(size)*(sizeof(type)/sizeof(char))))
|
|
#define RESTORE_STACK (global_stack = _saved_stack)
|
|
#define ALLOC_STACK char *_saved_stack; (global_stack = (global_stack==0) ? opus_alloc_scratch(GLOBAL_STACK_SIZE) : global_stack); _saved_stack = global_stack;
|
|
|
|
#endif /* ENABLE_VALGRIND */
|
|
|
|
#include "os_support.h"
|
|
#define VARDECL(type, var) type *var
|
|
#define ALLOC(var, size, type) var = PUSH(global_stack, size, type)
|
|
#define SAVE_STACK char *_saved_stack = global_stack;
|
|
|
|
#endif /* VAR_ARRAYS */
|
|
|
|
#endif /* STACK_ALLOC_H */
|