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/* $Id: alloc.cpp $ */
/** @file
* IPRT - Memory Allocation.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* 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.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "alloc-ef.h"
#include <iprt/alloc.h>
#include <iprt/assert.h>
#include <iprt/param.h>
#include <iprt/string.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.
*/
RTDECL(void *) RTMemTmpAlloc(size_t cb) RT_NO_THROW
{
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.
*/
RTDECL(void *) RTMemTmpAllocZ(size_t cb) RT_NO_THROW
{
return RTMemAllocZ(cb);
}
/**
* Free temporary memory.
*
* @param pv Pointer to memory block.
*/
RTDECL(void) RTMemTmpFree(void *pv) RT_NO_THROW
{
RTMemFree(pv);
}
/**
* Allocates memory.
*
* @returns Pointer to the allocated memory.
* @returns NULL on failure.
* @param cb Size in bytes of the memory block to allocate.
*/
RTDECL(void *) RTMemAlloc(size_t cb) RT_NO_THROW
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtMemAlloc("Alloc", RTMEMTYPE_RTMEMALLOC, cb, ((void **)&cb)[-1], 0, NULL, NULL);
#else /* !RTALLOC_USE_EFENCE */
AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
void *pv = malloc(cb);
AssertMsg(pv, ("malloc(%d) failed!!!\n", cb));
#ifdef RT_OS_OS2 /* temporary workaround until libc062. */
AssertMsg( cb < 32
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1)), ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#else
AssertMsg( cb < RTMEM_ALIGNMENT
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1)), ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#endif
#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.
*/
RTDECL(void *) RTMemAllocZ(size_t cb) RT_NO_THROW
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtMemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cb, ((void **)&cb)[-1], 0, NULL, NULL);
#else /* !RTALLOC_USE_EFENCE */
AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
void *pv = calloc(1, cb);
AssertMsg(pv, ("calloc(1,%d) failed!!!\n", cb));
#ifdef RT_OS_OS2 /* temporary workaround until libc062. */
AssertMsg( cb < 32
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1)), ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#else
AssertMsg( cb < RTMEM_ALIGNMENT
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1)), ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#endif
#endif /* !RTALLOC_USE_EFENCE */
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).
*/
RTDECL(void *) RTMemRealloc(void *pvOld, size_t cbNew) RT_NO_THROW
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtMemRealloc("Realloc", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, ((void **)&pvOld)[-1], 0, NULL, NULL);
#else /* !RTALLOC_USE_EFENCE */
void *pv = realloc(pvOld, cbNew);
AssertMsg(pv && cbNew, ("realloc(%p, %d) failed!!!\n", pvOld, cbNew));
#ifdef RT_OS_OS2 /* temporary workaround until libc062. */
AssertMsg( cbNew < 32
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1)), ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#else
AssertMsg( cbNew < RTMEM_ALIGNMENT
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1)), ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#endif
#endif /* !RTALLOC_USE_EFENCE */
return pv;
}
/**
* Free memory related to a virtual machine
*
* @param pv Pointer to memory block.
*/
RTDECL(void) RTMemFree(void *pv) RT_NO_THROW
{
if (pv)
#ifdef RTALLOC_USE_EFENCE
rtMemFree("Free", RTMEMTYPE_RTMEMFREE, pv, ((void **)&pv)[-1], 0, NULL, NULL);
#else
free(pv);
#endif
}
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