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/**
* @file llmemory.h
* @brief Memory allocation/deallocation header-stuff goes here.
*
* $LicenseInfo:firstyear=2002&license=viewergpl$
*
* Copyright (c) 2002-2009, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LLMEMORY_H
#define LLMEMORY_H
#include <stdlib.h>
// A not necessarily efficient, but general, aligned malloc http://stackoverflow.com/questions/196329/osx-lacks-memalign
inline void* ll_aligned_malloc( size_t size, int align )
{
void* mem = malloc( size + (align - 1) + sizeof(void*) );
char* aligned = ((char*)mem) + sizeof(void*);
aligned += align - ((uintptr_t)aligned & (align - 1));
((void**)aligned)[-1] = mem;
return aligned;
}
inline void ll_aligned_free( void* ptr )
{
free( ((void**)ptr)[-1] );
}
inline void* ll_aligned_malloc_16(size_t size) // returned hunk MUST be freed with ll_aligned_free_16().
{
#if defined(LL_WINDOWS)
return _mm_malloc(size, 16);
#elif defined(LL_DARWIN)
return malloc(size); // default osx malloc is 16 byte aligned.
#else
void *rtn;
if (LL_LIKELY(0 == posix_memalign(&rtn, 16, size)))
return rtn;
else // bad alignment requested, or out of memory
return NULL;
#endif
}
inline void ll_aligned_free_16(void *p)
{
#if defined(LL_WINDOWS)
_mm_free(p);
#elif defined(LL_DARWIN)
return free(p);
#else
free(p); // posix_memalign() is compatible with heap deallocator
#endif
}
inline void* ll_aligned_malloc_32(size_t size) // returned hunk MUST be freed with ll_aligned_free_32().
{
#if defined(LL_WINDOWS)
return _mm_malloc(size, 32);
#elif defined(LL_DARWIN)
return ll_aligned_malloc( size, 32 );
#else
void *rtn;
if (LL_LIKELY(0 == posix_memalign(&rtn, 32, size)))
return rtn;
else // bad alignment requested, or out of memory
return NULL;
#endif
}
inline void ll_aligned_free_32(void *p)
{
#if defined(LL_WINDOWS)
_mm_free(p);
#elif defined(LL_DARWIN)
ll_aligned_free( p );
#else
free(p); // posix_memalign() is compatible with heap deallocator
#endif
}
class LL_COMMON_API LLMemory
{
public:
static void initClass();
static void cleanupClass();
static void freeReserve();
// Return the resident set size of the current process, in bytes.
// Return value is zero if not known.
static U64 getCurrentRSS();
private:
static char* reserveMem;
};
// LLRefCount moved to llrefcount.h
// LLPointer moved to llpointer.h
// LLSafeHandle moved to llsafehandle.h
// LLSingleton moved to llsingleton.h
#endif
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