alloc.cpp revision e64031e20c39650a7bc902a3e1aba613b9415dee
/* $Id$ */
/** @file
* IPRT - Memory Allocation.
*/
/*
* Copyright (C) 2006-2007 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
#ifdef RTMEM_WRAP_TO_EF_APIS
# define RTALLOC_USE_EFENCE 1
#endif
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "alloc-ef.h"
#include <stdlib.h>
/**
* Allocates temporary memory.
*
* Temporary memory blocks are used for not too large memory blocks which
* are believed not to stick around for too long. Using this API instead
* of RTMemAlloc() not only gives the heap manager room for optimization
* but makes the code easier to read.
*
* @returns Pointer to the allocated memory.
* @returns NULL on failure.
* @param cb Size in bytes of the memory block to allocate.
*/
{
return RTMemAlloc(cb);
}
/**
* Allocates zero'ed temporary memory.
*
* Same as RTMemTmpAlloc() but the memory will be zero'ed.
*
* @returns Pointer to the allocated memory.
* @returns NULL on failure.
* @param cb Size in bytes of the memory block to allocate.
*/
{
return RTMemAllocZ(cb);
}
/**
* Free temporary memory.
*
* @param pv Pointer to memory block.
*/
{
}
/**
* Allocates memory.
*
* @returns Pointer to the allocated memory.
* @returns NULL on failure.
* @param cb Size in bytes of the memory block to allocate.
*/
{
#ifdef RTALLOC_USE_EFENCE
#else /* !RTALLOC_USE_EFENCE */
AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
#endif /* !RTALLOC_USE_EFENCE */
return pv;
}
/**
* Allocates zero'ed memory.
*
* Instead of memset(pv, 0, sizeof()) use this when you want zero'ed
* memory. This keeps the code smaller and the heap can skip the memset
* in about 0.42% of the calls :-).
*
* @returns Pointer to the allocated memory.
* @returns NULL on failure.
* @param cb Size in bytes of the memory block to allocate.
*/
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cb, cb, ASMReturnAddress(), NULL, 0, NULL);
#else /* !RTALLOC_USE_EFENCE */
AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
#endif /* !RTALLOC_USE_EFENCE */
return pv;
}
/**
* Wrapper around RTMemAlloc for automatically aligning variable sized
* allocations so that the various electric fence heaps works correctly.
*
* @returns See RTMemAlloc.
* @param cbUnaligned The unaligned size.
*/
{
if (cbUnaligned >= 16)
else
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemAlloc("AllocVar", RTMEMTYPE_RTMEMALLOC, cbUnaligned, cbAligned, ASMReturnAddress(), NULL, 0, NULL);
#else
#endif
return pv;
}
/**
* Wrapper around RTMemAllocZ for automatically aligning variable sized
* allocations so that the various electric fence heaps works correctly.
*
* @returns See RTMemAllocZ.
* @param cbUnaligned The unaligned size.
*/
{
if (cbUnaligned >= 16)
else
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemAlloc("AllocZVar", RTMEMTYPE_RTMEMALLOCZ, cbUnaligned, cbAligned, ASMReturnAddress(), NULL, 0, NULL);
#else
#endif
return pv;
}
/**
* Reallocates memory.
*
* @returns Pointer to the allocated memory.
* @returns NULL on failure.
* @param pvOld The memory block to reallocate.
* @param cbNew The new block size (in bytes).
*/
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemRealloc("Realloc", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, ASMReturnAddress(), NULL, 0, NULL);
#else /* !RTALLOC_USE_EFENCE */
#endif /* !RTALLOC_USE_EFENCE */
return pv;
}
/**
* Free memory related to a virtual machine
*
* @param pv Pointer to memory block.
*/
{
if (pv)
#ifdef RTALLOC_USE_EFENCE
#else
#endif
}