stack_alloc.h
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /* Copyright (C) 2002 Jean-Marc Valin
- File: stack_alloc.h
- 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.
- - 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,
- 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 USE_ALLOCA
- #include <alloca.h>
- #endif
- #ifdef ENABLE_VALGRIND
- #include <valgrind/memcheck.h>
- /*Aligns the stack to a 'size' boundary */
- #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
- /* Allocates 'size' elements of type 'type' on the stack */
- #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))))
- /* Allocates a struct stack */
- #define PUSHS(stack, type) (VALGRIND_MAKE_NOACCESS(stack, 1000),ALIGN((stack),sizeof(long)),VALGRIND_MAKE_WRITABLE(stack, (sizeof(type))),(stack)+=(sizeof(type)),(type*)((stack)-(sizeof(type))))
- #else
- /*Aligns the stack to a 'size' boundary */
- #define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
- /* Allocates 'size' elements of type 'type' on the stack */
- #define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type))))
- /* Allocates a struct stack */
- #define PUSHS(stack, type) (ALIGN((stack),sizeof(long)),(stack)+=(sizeof(type)),(type*)((stack)-(sizeof(type))))
- #endif
- #if defined(VAR_ARRAYS)
- #define VARDECL(var)
- #define ALLOC(var, size, type) type var[size]
- #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
- #endif