source-engine/public/tier0/memalloc.h

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: This header should never be used directly from leaf code!!!
// Instead, just add the file memoverride.cpp into your project and all this
// will automagically be used
//
// $NoKeywords: $
//=============================================================================//

#ifndef TIER0_MEMALLOC_H
#define TIER0_MEMALLOC_H

#ifdef _WIN32
#pragma once
#endif

// These memory debugging switches aren't relevant under Linux builds since memoverride.cpp
// isn't built into Linux projects
#ifndef POSIX
// Define this in release to get memory tracking even in release builds
//#define USE_MEM_DEBUG 1
#endif

#if defined( _MEMTEST )
#ifdef _WIN32
#define USE_MEM_DEBUG 1
#endif
#endif

// Undefine this if using a compiler lacking threadsafe RTTI (like vc6)
#ifndef COMPILER_MSVC
#define MEM_DEBUG_CLASSNAME 1
#endif

#include <stddef.h>
#if defined( OSX )
#include <malloc/malloc.h>
#endif

#include "tier0/mem.h"

#if !defined(STEAM) && !defined(NO_MALLOC_OVERRIDE)

struct _CrtMemState;

#define MEMALLOC_VERSION 1

typedef size_t (*MemAllocFailHandler_t)( size_t );

//-----------------------------------------------------------------------------
// NOTE! This should never be called directly from leaf code
// Just use new,delete,malloc,free etc. They will call into this eventually
//-----------------------------------------------------------------------------
abstract_class IMemAlloc
{
public:
	// Release versions
	virtual void *Alloc( size_t nSize ) = 0;
	virtual void *Realloc( void *pMem, size_t nSize ) = 0;
	virtual void Free( void *pMem ) = 0;
    virtual void *Expand_NoLongerSupported( void *pMem, size_t nSize ) = 0;

	// Debug versions
    virtual void *Alloc( size_t nSize, const char *pFileName, int nLine ) = 0;
    virtual void *Realloc( void *pMem, size_t nSize, const char *pFileName, int nLine ) = 0;
    virtual void  Free( void *pMem, const char *pFileName, int nLine ) = 0;
    virtual void *Expand_NoLongerSupported( void *pMem, size_t nSize, const char *pFileName, int nLine ) = 0;

	// Returns size of a particular allocation
	virtual size_t GetSize( void *pMem ) = 0;

    // Force file + line information for an allocation
    virtual void PushAllocDbgInfo( const char *pFileName, int nLine ) = 0;
    virtual void PopAllocDbgInfo() = 0;

	// FIXME: Remove when we have our own allocator
	// these methods of the Crt debug code is used in our codebase currently
	virtual long CrtSetBreakAlloc( long lNewBreakAlloc ) = 0;
	virtual	int CrtSetReportMode( int nReportType, int nReportMode ) = 0;
	virtual int CrtIsValidHeapPointer( const void *pMem ) = 0;
	virtual int CrtIsValidPointer( const void *pMem, unsigned int size, int access ) = 0;
	virtual int CrtCheckMemory( void ) = 0;
	virtual int CrtSetDbgFlag( int nNewFlag ) = 0;
	virtual void CrtMemCheckpoint( _CrtMemState *pState ) = 0;

	// FIXME: Make a better stats interface
	virtual void DumpStats() = 0;
	virtual void DumpStatsFileBase( char const *pchFileBase ) = 0;

	// FIXME: Remove when we have our own allocator
	virtual void* CrtSetReportFile( int nRptType, void* hFile ) = 0;
	virtual void* CrtSetReportHook( void* pfnNewHook ) = 0;
	virtual int CrtDbgReport( int nRptType, const char * szFile,
			int nLine, const char * szModule, const char * pMsg ) = 0;

	virtual int heapchk() = 0;

	virtual bool IsDebugHeap() = 0;

	virtual void GetActualDbgInfo( const char *&pFileName, int &nLine ) = 0;
	virtual void RegisterAllocation( const char *pFileName, int nLine, size_t nLogicalSize, size_t nActualSize, unsigned nTime ) = 0;
	virtual void RegisterDeallocation( const char *pFileName, int nLine, size_t nLogicalSize, size_t nActualSize, unsigned nTime ) = 0;

	virtual int GetVersion() = 0;

	virtual void CompactHeap() = 0;

	// Function called when malloc fails or memory limits hit to attempt to free up memory (can come in any thread)
	virtual MemAllocFailHandler_t SetAllocFailHandler( MemAllocFailHandler_t pfnMemAllocFailHandler ) = 0;

	virtual void DumpBlockStats( void * ) = 0;

#if defined( _MEMTEST )	
	virtual void SetStatsExtraInfo( const char *pMapName, const char *pComment ) = 0;
#endif

	// Returns 0 if no failure, otherwise the size_t of the last requested chunk
	//  "I'm sure this is completely thread safe!" Brian Deen 7/19/2012.
	virtual size_t MemoryAllocFailed() = 0;

	// handles storing allocation info for coroutines
	virtual uint32 GetDebugInfoSize() = 0;
	virtual void SaveDebugInfo( void *pvDebugInfo ) = 0;
	virtual void RestoreDebugInfo( const void *pvDebugInfo ) = 0;	
	virtual void InitDebugInfo( void *pvDebugInfo, const char *pchRootFileName, int nLine ) = 0;

	// Replacement for ::GlobalMemoryStatus which accounts for unused memory in our system
	virtual void GlobalMemoryStatus( size_t *pUsedMemory, size_t *pFreeMemory ) = 0;
};

//-----------------------------------------------------------------------------
// Singleton interface
//-----------------------------------------------------------------------------
MEM_INTERFACE IMemAlloc *g_pMemAlloc;

//-----------------------------------------------------------------------------

#ifdef MEMALLOC_REGIONS
#ifndef MEMALLOC_REGION
#define MEMALLOC_REGION 0
#endif
inline void *MemAlloc_Alloc( size_t nSize )
{ 
	return g_pMemAlloc->RegionAlloc( MEMALLOC_REGION, nSize );
}

inline void *MemAlloc_Alloc( size_t nSize, const char *pFileName, int nLine )
{ 
	return g_pMemAlloc->RegionAlloc( MEMALLOC_REGION, nSize, pFileName, nLine );
}
#else
#undef MEMALLOC_REGION
inline void *MemAlloc_Alloc( size_t nSize )
{ 
	return g_pMemAlloc->Alloc( nSize );
}

inline void *MemAlloc_Alloc( size_t nSize, const char *pFileName, int nLine )
{ 
	return g_pMemAlloc->Alloc( nSize, pFileName, nLine );
}
#endif
inline void MemAlloc_Free( void *ptr )
{
	g_pMemAlloc->Free( ptr );
}
inline void MemAlloc_Free( void *ptr, const char *pFileName, int nLine )
{
	g_pMemAlloc->Free( ptr, pFileName, nLine );
}

//-----------------------------------------------------------------------------

inline bool ValueIsPowerOfTwo( size_t value )			// don't clash with mathlib definition
{
	return (value & ( value - 1 )) == 0;
}

inline void *MemAlloc_AllocAligned( size_t size, size_t align )
{
	unsigned char *pAlloc, *pResult;

	if (!IsPowerOfTwo(align))
		return NULL;

	align = (align > sizeof(void *) ? align : sizeof(void *)) - 1;

	if ( (pAlloc = (unsigned char*)g_pMemAlloc->Alloc( sizeof(void *) + align + size ) ) == (unsigned char*)NULL)
		return NULL;

	pResult = (unsigned char*)( (size_t)(pAlloc + sizeof(void *) + align ) & ~align );
	((unsigned char**)(pResult))[-1] = pAlloc;

	return (void *)pResult;
}

inline void *MemAlloc_AllocAligned( size_t size, size_t align, const char *pszFile, int nLine )
{
	unsigned char *pAlloc, *pResult;

	if (!IsPowerOfTwo(align))
		return NULL;

	align = (align > sizeof(void *) ? align : sizeof(void *)) - 1;

	if ( (pAlloc = (unsigned char*)g_pMemAlloc->Alloc( sizeof(void *) + align + size, pszFile, nLine ) ) == (unsigned char*)NULL)
		return NULL;

	pResult = (unsigned char*)( (size_t)(pAlloc + sizeof(void *) + align ) & ~align );
	((unsigned char**)(pResult))[-1] = pAlloc;

	return (void *)pResult;
}

inline void *MemAlloc_AllocAlignedUnattributed( size_t size, size_t align )
{
	unsigned char *pAlloc, *pResult;

	if (!ValueIsPowerOfTwo(align))
		return NULL;

	align = (align > sizeof(void *) ? align : sizeof(void *)) - 1;

	if ( (pAlloc = (unsigned char*)MemAlloc_Alloc( sizeof(void *) + align + size ) ) == (unsigned char*)NULL)
		return NULL;

	pResult = (unsigned char*)( (size_t)(pAlloc + sizeof(void *) + align ) & ~align );
	((unsigned char**)(pResult))[-1] = pAlloc;

	return (void *)pResult;
}

inline void *MemAlloc_AllocAlignedFileLine( size_t size, size_t align, const char *pszFile, int nLine )
{
	unsigned char *pAlloc, *pResult;

	if (!ValueIsPowerOfTwo(align))
		return NULL;

	align = (align > sizeof(void *) ? align : sizeof(void *)) - 1;

	if ( (pAlloc = (unsigned char*)MemAlloc_Alloc( sizeof(void *) + align + size, pszFile, nLine ) ) == (unsigned char*)NULL)
		return NULL;

	pResult = (unsigned char*)( (size_t)(pAlloc + sizeof(void *) + align ) & ~align );
	((unsigned char**)(pResult))[-1] = pAlloc;

	return (void *)pResult;
}

inline void *MemAlloc_ReallocAligned( void *ptr, size_t size, size_t align )
{
	if ( !IsPowerOfTwo( align ) )
		return NULL;

	// Don't change alignment between allocation + reallocation.
	if ( ( (size_t)ptr & ( align - 1 ) ) != 0 )
		return NULL;

	if ( !ptr )
		return MemAlloc_AllocAligned( size, align );

	void *pAlloc, *pResult;

	// Figure out the actual allocation point
	pAlloc = ptr;
	pAlloc = (void *)(((size_t)pAlloc & ~( sizeof(void *) - 1 ) ) - sizeof(void *));
	pAlloc = *( (void **)pAlloc );

	// See if we have enough space
	size_t nOffset = (size_t)ptr - (size_t)pAlloc;
	size_t nOldSize = g_pMemAlloc->GetSize( pAlloc );
	if ( nOldSize >= size + nOffset )
		return ptr;

	pResult = MemAlloc_AllocAligned( size, align );
	memcpy( pResult, ptr, nOldSize - nOffset );
	g_pMemAlloc->Free( pAlloc );
	return pResult;
}

inline void MemAlloc_FreeAligned( void *pMemBlock )
{
	void *pAlloc;

	if ( pMemBlock == NULL )
		return;

	pAlloc = pMemBlock;

	// pAlloc points to the pointer to starting of the memory block
	pAlloc = (void *)(((size_t)pAlloc & ~( sizeof(void *) - 1 ) ) - sizeof(void *));

	// pAlloc is the pointer to the start of memory block
	pAlloc = *( (void **)pAlloc );
	g_pMemAlloc->Free( pAlloc );
}

inline void MemAlloc_FreeAligned( void *pMemBlock, const char *pFileName, int nLine )
{
	void *pAlloc;

	if ( pMemBlock == NULL )
		return;

	pAlloc = pMemBlock;

	// pAlloc points to the pointer to starting of the memory block
	pAlloc = (void *)(((size_t)pAlloc & ~( sizeof(void *) - 1 ) ) - sizeof(void *));

	// pAlloc is the pointer to the start of memory block
	pAlloc = *( (void **)pAlloc );
	g_pMemAlloc->Free( pAlloc, pFileName, nLine );
}

inline size_t MemAlloc_GetSizeAligned( void *pMemBlock )
{
	void *pAlloc;

	if ( pMemBlock == NULL )
		return 0;

	pAlloc = pMemBlock;

	// pAlloc points to the pointer to starting of the memory block
	pAlloc = (void *)(((size_t)pAlloc & ~( sizeof(void *) - 1 ) ) - sizeof(void *));

	// pAlloc is the pointer to the start of memory block
	pAlloc = *((void **)pAlloc );
	return g_pMemAlloc->GetSize( pAlloc ) - ( (byte *)pMemBlock - (byte *)pAlloc );
}

//-----------------------------------------------------------------------------

#if (defined(_DEBUG) || defined(USE_MEM_DEBUG))
#define MEM_ALLOC_CREDIT_JOIN_AGAIN( a, b )							a ## b
#define MEM_ALLOC_CREDIT_JOIN( a, b )								MEM_ALLOC_CREDIT_JOIN_AGAIN( a, b )
#define MEM_ALLOC_CREDIT_(tag)										CMemAllocAttributeAlloction MEM_ALLOC_CREDIT_JOIN( memAllocAttributeAlloction, __LINE__ )( tag, __LINE__ )
#define MemAlloc_PushAllocDbgInfo( pszFile, line ) g_pMemAlloc->PushAllocDbgInfo( pszFile, line )
#define MemAlloc_PopAllocDbgInfo() g_pMemAlloc->PopAllocDbgInfo()
#define MemAlloc_RegisterAllocation( pFileName, nLine, nLogicalSize, nActualSize, nTime ) g_pMemAlloc->RegisterAllocation( pFileName, nLine, nLogicalSize, nActualSize, nTime )
#define MemAlloc_RegisterDeallocation( pFileName, nLine, nLogicalSize, nActualSize, nTime ) g_pMemAlloc->RegisterDeallocation( pFileName, nLine, nLogicalSize, nActualSize, nTime )
#else
#define MEM_ALLOC_CREDIT_(tag)	((void)0)
#define MemAlloc_PushAllocDbgInfo( pszFile, line ) ((void)0)
#define MemAlloc_PopAllocDbgInfo() ((void)0)
#define MemAlloc_RegisterAllocation( pFileName, nLine, nLogicalSize, nActualSize, nTime ) ((void)0)
#define MemAlloc_RegisterDeallocation( pFileName, nLine, nLogicalSize, nActualSize, nTime ) ((void)0)
#endif

#define MemAlloc_DumpStats() g_pMemAlloc->DumpStats()
#define MemAlloc_CompactHeap() g_pMemAlloc->CompactHeap()
#define MemAlloc_CompactIncremental() g_pMemAlloc->CompactIncremental()
#define MemAlloc_DumpStatsFileBase( _filename ) g_pMemAlloc->DumpStatsFileBase( _filename )
#define MemAlloc_CrtCheckMemory() g_pMemAlloc->CrtCheckMemory()
#define MemAlloc_GlobalMemoryStatus( _usedMemory, _freeMemory ) g_pMemAlloc->GlobalMemoryStatus( _usedMemory, _freeMemory )
#define MemAlloc_MemoryAllocFailed() g_pMemAlloc->MemoryAllocFailed()

#define MemAlloc_GetDebugInfoSize() g_pMemAlloc->GetDebugInfoSize()
#define MemAlloc_SaveDebugInfo( pvDebugInfo ) g_pMemAlloc->SaveDebugInfo( pvDebugInfo )
#define MemAlloc_RestoreDebugInfo( pvDebugInfo ) g_pMemAlloc->RestoreDebugInfo( pvDebugInfo )
#define MemAlloc_InitDebugInfo( pvDebugInfo, pchRootFileName, nLine ) g_pMemAlloc->InitDebugInfo( pvDebugInfo, pchRootFileName, nLine )
#define MemAlloc_GetSize( x ) g_pMemAlloc->GetSize( x );
//-----------------------------------------------------------------------------

class CMemAllocAttributeAlloction
{
public:
	CMemAllocAttributeAlloction( const char *pszFile, int line ) 
	{
		MemAlloc_PushAllocDbgInfo( pszFile, line );
	}
	
	~CMemAllocAttributeAlloction()
	{
		MemAlloc_PopAllocDbgInfo();
	}
};

#define MEM_ALLOC_CREDIT()	MEM_ALLOC_CREDIT_(__FILE__)

//-----------------------------------------------------------------------------

#if defined(_WIN32) && ( defined(_DEBUG) || defined(USE_MEM_DEBUG) )

	#pragma warning(disable:4290)
	#pragma warning(push)
	#include <typeinfo>

	// MEM_DEBUG_CLASSNAME is opt-in.
	// Note: typeid().name() is not threadsafe, so if the project needs to access it in multiple threads
	// simultaneously, it'll need a mutex.
	#if defined(_CPPRTTI) && defined(MEM_DEBUG_CLASSNAME)
		#define MEM_ALLOC_CREDIT_CLASS()	MEM_ALLOC_CREDIT_( typeid(*this).name() )
		#define MEM_ALLOC_CLASSNAME(type) (typeid((type*)(0)).name())
	#else
		#define MEM_ALLOC_CREDIT_CLASS()	MEM_ALLOC_CREDIT_( __FILE__ )
		#define MEM_ALLOC_CLASSNAME(type) (__FILE__)
	#endif

	// MEM_ALLOC_CREDIT_FUNCTION is used when no this pointer is available ( inside 'new' overloads, for example )
	#ifdef _MSC_VER
		#define MEM_ALLOC_CREDIT_FUNCTION()		MEM_ALLOC_CREDIT_( __FUNCTION__ )
	#else
		#define MEM_ALLOC_CREDIT_FUNCTION() (__FILE__)
	#endif

	#pragma warning(pop)
#else
	#define MEM_ALLOC_CREDIT_CLASS()
	#define MEM_ALLOC_CLASSNAME(type) NULL
	#define MEM_ALLOC_CREDIT_FUNCTION() 
#endif

//-----------------------------------------------------------------------------

#if (defined(_DEBUG) || defined(USE_MEM_DEBUG))
struct MemAllocFileLine_t
{
	const char *pszFile;
	int line;
};

#define MEMALLOC_DEFINE_EXTERNAL_TRACKING( tag ) \
	static CUtlMap<void *, MemAllocFileLine_t, int> g_##tag##Allocs( DefLessFunc( void *) ); \
	static const char *g_psz##tag##Alloc = strcpy( (char *)g_pMemAlloc->Alloc( strlen( #tag "Alloc" ) + 1, "intentional leak", 0 ), #tag "Alloc" );

#define MemAlloc_RegisterExternalAllocation( tag, p, size ) \
	if ( !p ) \
		; \
	else \
	{ \
		MemAllocFileLine_t fileLine = { g_psz##tag##Alloc, 0 }; \
		g_pMemAlloc->GetActualDbgInfo( fileLine.pszFile, fileLine.line ); \
		if ( fileLine.pszFile != g_psz##tag##Alloc ) \
		{ \
			g_##tag##Allocs.Insert( p, fileLine ); \
		} \
		\
		MemAlloc_RegisterAllocation( fileLine.pszFile, fileLine.line, size, size, 0); \
	}

#define MemAlloc_RegisterExternalDeallocation( tag, p, size ) \
	if ( !p ) \
		; \
	else \
	{ \
		MemAllocFileLine_t fileLine = { g_psz##tag##Alloc, 0 }; \
		CUtlMap<void *, MemAllocFileLine_t, int>::IndexType_t iRecordedFileLine = g_##tag##Allocs.Find( p ); \
		if ( iRecordedFileLine !=  g_##tag##Allocs.InvalidIndex() ) \
		{ \
			fileLine = g_##tag##Allocs[iRecordedFileLine]; \
			g_##tag##Allocs.RemoveAt( iRecordedFileLine ); \
		} \
		\
		MemAlloc_RegisterDeallocation( fileLine.pszFile, fileLine.line, size, size, 0); \
	}

#else

#define MEMALLOC_DEFINE_EXTERNAL_TRACKING( tag )
#define MemAlloc_RegisterExternalAllocation( tag, p, size ) ((void)0)
#define MemAlloc_RegisterExternalDeallocation( tag, p, size ) ((void)0)

#endif

//-----------------------------------------------------------------------------

#elif defined( POSIX )

inline void MemAlloc_CheckAlloc( void *ptr, size_t nSize )
{
	if ( !ptr )
		MemAllocOOMError( nSize );
}

#if defined( OSX )
inline void *memalign(size_t alignment, size_t size) {
    // MoeMod : 64bit fix
    if(alignment < sizeof(void *))
        alignment = sizeof(void *);
    void *pTmp = nullptr;
    posix_memalign(&pTmp, alignment, size);
    return pTmp;
}
#endif

inline void *_aligned_malloc( size_t nSize, size_t align )															{ void *ptr = memalign( align, nSize ); MemAlloc_CheckAlloc( ptr, nSize ); return ptr;  }
inline void _aligned_free( void *ptr )																				{ free( ptr ); }

inline void *MemAlloc_Alloc( size_t nSize, const char *pFileName = NULL, int nLine = 0 )							{ void *ptr = malloc( nSize ); MemAlloc_CheckAlloc( ptr, nSize ); return ptr; }
inline void MemAlloc_Free( void *ptr, const char *pFileName = NULL, int nLine = 0 )									{ free( ptr ); }

inline void *MemAlloc_AllocAligned( size_t size, size_t align, const char *pszFile = NULL, int nLine = 0  )	        { void *ptr = memalign( align, size ); MemAlloc_CheckAlloc( ptr, size ); return ptr; }
inline void *MemAlloc_AllocAlignedFileLine( size_t size, size_t align, const char *pszFile = NULL, int nLine = 0 )	{ void *ptr = memalign( align, size ); MemAlloc_CheckAlloc( ptr, size ); return ptr; }
inline void MemAlloc_FreeAligned( void *pMemBlock, const char *pszFile = NULL, int nLine = 0 ) 						{ free( pMemBlock ); }

#if defined( OSX )
inline size_t _msize( void *ptr )																					{ return malloc_size( ptr ); }
#else
inline size_t _msize( void *ptr )																					{ return malloc_usable_size( ptr ); }
#endif

inline void *MemAlloc_ReallocAligned( void *ptr, size_t size, size_t align )
{
	void *ptr_new_aligned = memalign( align, size );

	if( ptr_new_aligned )
	{
		size_t old_size = _msize( ptr );
		size_t copy_size = ( size < old_size ) ? size : old_size;

		memcpy( ptr_new_aligned, ptr, copy_size );
		free( ptr );
	}

	MemAlloc_CheckAlloc( ptr_new_aligned, size ); 
	return ptr_new_aligned;
}
#else
#define MemAlloc_GetDebugInfoSize() g_pMemAlloc->GetDebugInfoSize()
#define MemAlloc_SaveDebugInfo( pvDebugInfo ) g_pMemAlloc->SaveDebugInfo( pvDebugInfo )
#define MemAlloc_RestoreDebugInfo( pvDebugInfo ) g_pMemAlloc->RestoreDebugInfo( pvDebugInfo )
#define MemAlloc_InitDebugInfo( pvDebugInfo, pchRootFileName, nLine ) g_pMemAlloc->InitDebugInfo( pvDebugInfo, pchRootFileName, nLine )

#endif // !STEAM && !NO_MALLOC_OVERRIDE

//-----------------------------------------------------------------------------

#if !defined(STEAM) && defined(NO_MALLOC_OVERRIDE)

#define MEM_ALLOC_CREDIT_(tag)	((void)0)
#define MEM_ALLOC_CREDIT()	MEM_ALLOC_CREDIT_(__FILE__)
#define MEM_ALLOC_CREDIT_FUNCTION()
#define MEM_ALLOC_CREDIT_CLASS()
#define MEM_ALLOC_CLASSNAME(type) NULL

#define MemAlloc_PushAllocDbgInfo( pszFile, line )
#define MemAlloc_PopAllocDbgInfo()
#define MemAlloc_RegisterAllocation( pFileName, nLine, nLogicalSize, nActualSize, nTime ) ((void)0)
#define MemAlloc_RegisterDeallocation( pFileName, nLine, nLogicalSize, nActualSize, nTime ) ((void)0)
#define MemAlloc_DumpStats() ((void)0)
#define MemAlloc_CompactHeap() ((void)0)
#define MemAlloc_CompactIncremental() ((void)0)
#define MemAlloc_DumpStatsFileBase( _filename ) ((void)0)
inline bool MemAlloc_CrtCheckMemory() { return true; }
inline void MemAlloc_GlobalMemoryStatus( size_t *pusedMemory, size_t *pfreeMemory )
{
	*pusedMemory = 0;
	*pfreeMemory = 0;
}
#define MemAlloc_MemoryAllocFailed() 0

#define MemAlloc_GetDebugInfoSize() 0
#define MemAlloc_SaveDebugInfo( pvDebugInfo ) ((void)0)
#define MemAlloc_RestoreDebugInfo( pvDebugInfo ) ((void)0)
#define MemAlloc_InitDebugInfo( pvDebugInfo, pchRootFileName, nLine ) ((void)0)


#define MEMALLOC_DEFINE_EXTERNAL_TRACKING( tag )
#define MemAlloc_RegisterExternalAllocation( tag, p, size ) ((void)0)
#define MemAlloc_RegisterExternalDeallocation( tag, p, size ) ((void)0)

#endif // !STEAM && NO_MALLOC_OVERRIDE

//-----------------------------------------------------------------------------



// linux memory tracking via hooks.
#if defined( POSIX ) && !defined( NO_HOOK_MALLOC )
PLATFORM_INTERFACE void MemoryLogMessage( char const *s );						// throw a message into the memory log
PLATFORM_INTERFACE void EnableMemoryLogging( bool bOnOff );
PLATFORM_INTERFACE void DumpMemoryLog( int nThresh );
PLATFORM_INTERFACE void DumpMemorySummary( void );
PLATFORM_INTERFACE void SetMemoryMark( void );
PLATFORM_INTERFACE void DumpChangedMemory( int nThresh );

#else
FORCEINLINE void MemoryLogMessage( char const *s )
{
}

FORCEINLINE void EnableMemoryLogging( bool bOnOff )
{
}
FORCEINLINE void DumpMemoryLog( int nThresh )
{
}
FORCEINLINE void DumpMemorySummary( void )
{
}
FORCEINLINE void SetMemoryMark( void )
{
}
FORCEINLINE void DumpChangedMemory( int nThresh )
{
}

#endif

#ifdef POSIX
// ApproximateProcessMemoryUsage returns the approximate memory footprint of this process.
PLATFORM_INTERFACE size_t ApproximateProcessMemoryUsage( void );
#else
FORCEINLINE size_t ApproximateProcessMemoryUsage( void )
{
	return 0;
}

#endif

struct aligned_tmp_t
{
	// empty base class
};

/*
This class used to be required if you wanted an object to be allocated with a specific
alignment. ALIGN16 and ALIGN16_POST are not actually sufficient for this because they
guarantee that the globals, statics, locals, and function parameters are appropriately
aligned they do not affect memory allocation alignment.
However this class is usually not needed because as of 2012 our policy is that our
allocator should take care of this automatically. Any object whose size is a multiple
of 16 will be 16-byte aligned. Existing uses of this class were not changed because
the cost/benefit did not justify it.
*/
// template here to allow adding alignment at levels of hierarchy that aren't the base
template< int bytesAlignment = 16, class T = aligned_tmp_t >
class CAlignedNewDelete : public T
{

public:
	/*
	Note that this class does not overload operator new[] and delete[] which means that
	classes that depend on this for alignment may end up misaligned if an array is
	allocated. This problem is now mostly theoretical because this class is mostly
	obsolete.
	*/
	void *operator new( size_t nSize )
	{
		return MemAlloc_AllocAligned( nSize, bytesAlignment );
	}

	void* operator new( size_t nSize, int nBlockUse, const char *pFileName, int nLine )
	{
		return MemAlloc_AllocAlignedFileLine( nSize, bytesAlignment, pFileName, nLine );
	}

	void operator delete(void *pData)
	{
		if ( pData )
		{
			MemAlloc_FreeAligned( pData );
		}
	}

	void operator delete( void* pData, int nBlockUse, const char *pFileName, int nLine )
	{
		if ( pData )
		{
			MemAlloc_FreeAligned( pData, pFileName, nLine );
		}
	}
};


#endif /* TIER0_MEMALLOC_H */