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windows-nt/Source/XPSP1/NT/multimedia/directx/dplay/dnet/common/lockedpool.h

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2020-09-26 03:20:57 -05:00
/*==========================================================================
*
* Copyright (C) 1995 - 2000 Microsoft Corporation. All Rights Reserved.
*
* File: LockedPool.h
* Content: Pool manager for classes
*
* History:
* Date By Reason
* ====== == ======
* 12-18-97 aarono Original
* 11-06-98 ejs Add custom handler for Release function
* 04-12-99 johnkan Trimmed unused functions and parameters, added size assert
* 01-31-2000 johnkan Added code to check for items already being in the pool on Release().
* 02-08-2000 johnkan Derived from ClassFPM.h
* 03-26-2000 johnkan Renamed to avoid collisions with other classes
* 04-06-2000 johnkan Modified to have a base class to derive pool items from
* 03-20-2001 vanceo Added thread-local versions
***************************************************************************/
#ifndef __LOCKED_POOL__
#define __LOCKED_POOL__
#undef DPF_SUBCOMP
#define DPF_SUBCOMP DN_SUBCOMP_COMMON
#define TRACK_POOL_STATS
//**********************************************************************
// Constant definitions
//**********************************************************************
#define CHECK_FOR_DUPLICATE_LOCKED_POOL_RELEASE
//**********************************************************************
// Macro definitions
//**********************************************************************
#ifndef OFFSETOF
// Macro to compute the offset of an element inside of a larger structure (copied from MSDEV's STDLIB.H)
#define OFFSETOF(s,m) ( (INT_PTR) &(((s *)0)->m) )
#define __LOCAL_OFFSETOF_DEFINED__
#endif // OFFSETOF
//**********************************************************************
// Structure definitions
//**********************************************************************
//
// forward reference
//
class CLockedPoolItem;
template< class T > class CLockedPool;
//**********************************************************************
// Variable definitions
//**********************************************************************
//**********************************************************************
// Function prototypes
//**********************************************************************
//**********************************************************************
// Class definitions
//**********************************************************************
//
// class to act as a link in the pool
//
class CLockedPoolItem
{
public:
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPoolItem::CLockedPoolItem"
CLockedPoolItem()
{
m_iRefCount = 0;
m_pNext = NULL;
}
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPoolItem::~CLockedPoolItem"
virtual ~CLockedPoolItem() { DNASSERT( m_iRefCount == 0 ); }
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPoolItem::AddRef"
void AddRef( void )
{
DNASSERT( m_iRefCount != -1 );
InterlockedIncrement( const_cast<LONG*>( &m_iRefCount ) );
}
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPoolItem::DecRef"
void DecRef( void )
{
DNASSERT( m_iRefCount != 0 );
if ( InterlockedDecrement( const_cast<LONG*>( &m_iRefCount ) ) == 0 )
{
ReturnSelfToPool();
}
}
CLockedPoolItem *GetNext( void ) const { return m_pNext; }
void InvalidateNext( void ) { m_pNext = NULL; }
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPoolItem::LinkToPool"
void LinkToPool( CLockedPoolItem *volatile *const ppPoolItems )
{
DNASSERT( ppPoolItems != NULL );
m_pNext = *ppPoolItems;
*ppPoolItems = this;
}
//
// Default initialization and deinitialization functions. These can
// be overridden by the derived classes.
//
virtual BOOL PoolAllocFunction( void ){ return TRUE; }
virtual BOOL PoolInitFunction( void ){ return TRUE; }
virtual void PoolReleaseFunction( void ){};
virtual void PoolDeallocFunction( void ){};
protected:
private:
//
// reference count used to return this item to the pool
//
volatile LONG m_iRefCount;
//
// pointer used to link this item to the rest of the pool
//
CLockedPoolItem *m_pNext;
virtual void ReturnSelfToPool( void ) = 0;
//
// prevent unwarranted copies
//
CLockedPoolItem( const CLockedPoolItem & );
CLockedPoolItem& operator=( const CLockedPoolItem & );
};
//
// class to manage the pool
//
template< class T >
class CLockedPool
{
public:
CLockedPool();
~CLockedPool();
void Lock( void ) { DNEnterCriticalSection( &m_Lock ); }
void Unlock( void ) { DNLeaveCriticalSection( &m_Lock ); }
BOOL Initialize( void );
void Deinitialize( void );
T *Get( void );
void Release( T *const pItem );
protected:
private:
DNCRITICAL_SECTION m_Lock;
CLockedPoolItem *volatile m_pPool; // pointer to list of available elements
DEBUG_ONLY( BOOL m_fInitialized );
DEBUG_ONLY( volatile LONG m_lOutstandingItemCount );
T *RemoveNode( void )
{
T *pReturn;
if ( m_pPool != NULL )
{
pReturn = static_cast<T*>( m_pPool );
m_pPool = m_pPool->GetNext();
DEBUG_ONLY( pReturn->InvalidateNext() );
}
else
{
pReturn = NULL;
}
return pReturn;
}
//
// prevent unwarranted copies
//
CLockedPool< T >( const CLockedPool< T > & );
CLockedPool< T >& operator=( const CLockedPool< T > & );
};
//**********************************************************************
// Class function definitions
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedPool::CLockedPool - constructor
//
// Entry: Nothing
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPool::CLockedPool"
template< class T >
CLockedPool< T >::CLockedPool():
m_pPool( NULL )
{
DEBUG_ONLY( m_fInitialized = FALSE );
DEBUG_ONLY( m_lOutstandingItemCount = 0 );
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedPool::~CLockedPool - destructor
//
// Entry: Nothing
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPool::~CLockedPool"
template< class T >
CLockedPool< T >::~CLockedPool()
{
DEBUG_ONLY( DNASSERT( m_lOutstandingItemCount == 0 ) );
DEBUG_ONLY( DNASSERT( m_fInitialized == FALSE ) );
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedPool::Initialize - initialize pool
//
// Entry: Nothing
//
// Exit: Boolean indicating success
// TRUE = initialization succeeded
// FALSE = initialization failed
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPool::Initialize"
template< class T >
BOOL CLockedPool< T >::Initialize( void )
{
BOOL fReturn;
DEBUG_ONLY( DNASSERT( m_fInitialized == FALSE ) );
fReturn = TRUE;
if ( DNInitializeCriticalSection( &m_Lock ) == FALSE )
{
fReturn = FALSE;
goto Exit;
}
DebugSetCriticalSectionRecursionCount( &m_Lock, 0 );
DEBUG_ONLY( m_fInitialized = TRUE );
Exit:
return fReturn;
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedPool::Deinitialize - deinitialize pool
//
// Entry: Nothing
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPool::Deinitialize"
template< class T >
void CLockedPool< T >::Deinitialize( void )
{
DEBUG_ONLY( DNASSERT( m_fInitialized != FALSE ) );
Lock();
DEBUG_ONLY( DNASSERT( m_lOutstandingItemCount == 0 ) );
while ( m_pPool != NULL )
{
CLockedPoolItem *pNode;
pNode = RemoveNode();
pNode->PoolDeallocFunction();
delete pNode;
}
Unlock();
DNDeleteCriticalSection( &m_Lock );
DEBUG_ONLY( m_fInitialized = FALSE );
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedPool::Get - get an item from the pool
//
// Entry: Nothing
//
// Exit: Pointer to item
// NULL = out of memory
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPool::Get"
template< class T >
T *CLockedPool< T >::Get( void )
{
T *pReturn;
DEBUG_ONLY( DNASSERT( m_fInitialized != FALSE ) );
//
// initialize
//
pReturn = NULL;
Lock();
//
// if the pool is empty, try to allocate a new entry, otherwise grab
// the first item from the pool
//
if ( m_pPool == NULL )
{
Unlock();
pReturn = new T;
if ( pReturn != NULL )
{
if ( pReturn->PoolAllocFunction() == FALSE )
{
delete pReturn;
pReturn = NULL;
}
}
}
else
{
pReturn = RemoveNode();
Unlock();
}
//
// if we have an entry (it was freshly created, or removed from the pool),
// attempt to initialize it before passing it to the user
//
if ( pReturn != NULL )
{
if ( pReturn->PoolInitFunction() == FALSE )
{
Lock();
pReturn->LinkToPool( &m_pPool );
Unlock();
pReturn = NULL;
}
else
{
pReturn->SetOwningPool( this );
pReturn->AddRef();
DEBUG_ONLY( InterlockedIncrement( const_cast<LONG*>( &m_lOutstandingItemCount ) ) );
}
}
return pReturn;
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedPool::Release - return item to pool
//
// Entry: Pointer to item
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedPool::Release"
template< class T >
void CLockedPool< T >::Release( T *const pItem )
{
DEBUG_ONLY( DNASSERT( m_fInitialized != FALSE ) );
DNASSERT( pItem != NULL );
DEBUG_ONLY( DNASSERT( pItem->GetNext() == NULL ) );
pItem->PoolReleaseFunction();
Lock();
#if defined(CHECK_FOR_DUPLICATE_LOCKED_POOL_RELEASE) && defined(DEBUG)
{
CLockedPoolItem *pTemp;
pTemp = m_pPool;
while ( pTemp != NULL )
{
DNASSERT( pTemp != pItem );
pTemp = pTemp->GetNext();
}
}
#endif // CHECK_FOR_DUPLICATE_LOCKED_POOL_RELEASE
DEBUG_ONLY( pItem->SetOwningPool( NULL ) );
#ifdef NO_POOLS
pItem->PoolDeallocFunction();
delete pItem;
#else
pItem->LinkToPool( &m_pPool );
#endif
Unlock();
DEBUG_ONLY( InterlockedDecrement( const_cast<LONG*>( &m_lOutstandingItemCount ) ) );
}
//**********************************************************************
//
// class to act as a link in the pool
//
class CLockedTLPoolItem
{
public:
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPoolItem::CLockedTLPoolItem"
CLockedTLPoolItem()
{
m_iRefCount = 0;
m_blList.Initialize();
}
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPoolItem::~CLockedTLPoolItem"
virtual ~CLockedTLPoolItem()
{
DNASSERT( m_iRefCount == 0 );
DNASSERT( m_blList.IsEmpty() );
}
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPoolItem::AddRef"
void AddRef( void )
{
DNASSERT( m_iRefCount != -1 );
InterlockedIncrement( const_cast<LONG*>( &m_iRefCount ) );
}
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPoolItem::DecRef"
void DecRef( void )
{
DNASSERT( m_iRefCount != 0 );
if ( InterlockedDecrement( const_cast<LONG*>( &m_iRefCount ) ) == 0 )
{
ReturnSelfToPool();
}
}
//
// Default initialization and deinitialization functions. These can
// be overridden by the derived classes.
//
virtual BOOL PoolAllocFunction( void ){ return TRUE; }
virtual BOOL PoolInitFunction( void ){ return TRUE; }
virtual void PoolReleaseFunction( void ){};
virtual void PoolDeallocFunction( void ){};
//
// linkage to the rest of the pool
//
CBilink m_blList;
#ifdef TRACK_POOL_STATS
DWORD m_dwSourceThreadID;
#endif // TRACK_POOL_STATS
protected:
private:
//
// reference count used to return this item to the pool
//
volatile LONG m_iRefCount;
virtual void ReturnSelfToPool( void ) = 0;
//
// prevent unwarranted copies
//
CLockedTLPoolItem( const CLockedTLPoolItem & );
CLockedTLPoolItem& operator=( const CLockedTLPoolItem & );
};
//
// class to manage the pool
//
template< class T >
class CLockedTLPool
{
public:
CLockedTLPool();
~CLockedTLPool();
BOOL Initialize( CLockedTLPool< T > * pGlobalPool );
void Deinitialize( void );
T *Get( void );
void Release( T *const pItem );
static void ReleaseWithoutPool( T *const pItem );
protected:
private:
CBilink m_blItems; // bilink list of available elements
CLockedTLPool< T > * m_pGlobalPool; // pointer to global pool, or NULL if this is the global pool
DNCRITICAL_SECTION * m_pcsLock; // pointer to pool critical section, or NULL if this is not the global pool
DWORD m_dwNumItems; // number of items currently in this pool
DEBUG_ONLY( BOOL m_fInitialized );
#ifdef TRACK_POOL_STATS
DWORD m_dwAllocations; // how many objects were allocated by this pool
DWORD m_dwSlurpsFromGlobal; // how many times some items were taken from the global pool
DWORD m_dwLargestSlurpFromGlobal; // most number of items taken from the global pool at one time
DWORD m_dwRetrievals; // how many times objects were pulled out of this pool
DWORD m_dwReturnsOnSameThread; // how many times objects that were pulled out of this pool were returned to this pool
DWORD m_dwReturnsOnDifferentThread; // how many times objects that were pulled out of another thread's pool were returned to this pool
DWORD m_dwDumpsToGlobal; // how many times some items were dumped into the global pool
DWORD m_dwDeallocations; // how many objects were freed by this pool
#endif // TRACK_POOL_STATS
//
// prevent unwarranted copies
//
CLockedTLPool< T >( const CLockedTLPool< T > & );
CLockedTLPool< T >& operator=( const CLockedTLPool< T > & );
};
//**********************************************************************
// Class function definitions
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedTLPool::CLockedTLPool - constructor
//
// Entry: Nothing
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPool::CLockedTLPool"
template< class T >
CLockedTLPool< T >::CLockedTLPool():
m_pGlobalPool( NULL ),
m_pcsLock( NULL ),
m_dwNumItems( 0 )
{
m_blItems.Initialize();
DEBUG_ONLY( m_fInitialized = FALSE );
#ifdef TRACK_POOL_STATS
m_dwAllocations = 0;
m_dwSlurpsFromGlobal = 0;
m_dwLargestSlurpFromGlobal = 0;
m_dwRetrievals = 0;
m_dwReturnsOnSameThread = 0;
m_dwReturnsOnDifferentThread = 0;
m_dwDumpsToGlobal = 0;
m_dwDeallocations = 0;
#endif // TRACK_POOL_STATS
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedTLPool::~CLockedTLPool - destructor
//
// Entry: Nothing
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPool::~CLockedTLPool"
template< class T >
CLockedTLPool< T >::~CLockedTLPool()
{
DNASSERT( m_fInitialized == FALSE );
DNASSERT( m_dwNumItems == 0 );
DNASSERT( m_blItems.IsEmpty() );
DNASSERT( m_pcsLock == NULL );
#ifdef TRACK_POOL_STATS
DPFX(DPFPREP, 9, "Pool 0x%p information:", this);
DPFX(DPFPREP, 9, "\tAllocations = %u", m_dwAllocations);
DPFX(DPFPREP, 9, "\tSlurpsFromGlobal = %u", m_dwSlurpsFromGlobal);
DPFX(DPFPREP, 9, "\tLargestSlurpFromGlobal = %u", m_dwLargestSlurpFromGlobal);
DPFX(DPFPREP, 9, "\tRetrievals = %u", m_dwRetrievals);
DPFX(DPFPREP, 9, "\tReturnsOnSameThread = %u", m_dwReturnsOnSameThread);
DPFX(DPFPREP, 9, "\tReturnsOnDifferentThread = %u", m_dwReturnsOnDifferentThread);
DPFX(DPFPREP, 9, "\tDumpsToGlobal = %u", m_dwDumpsToGlobal);
DPFX(DPFPREP, 9, "\tDeallocations = %u", m_dwDeallocations);
#endif // TRACK_POOL_STATS
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedTLPool::Initialize - initialize pool
//
// Entry: Pointer to global pool, or NULL if this is the global pool
//
// Exit: Boolean indicating success
// TRUE = initialization succeeded
// FALSE = initialization failed
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPool::Initialize"
template< class T >
BOOL CLockedTLPool< T >::Initialize( CLockedTLPool< T > * pGlobalPool )
{
BOOL fReturn;
fReturn = TRUE;
m_pGlobalPool = pGlobalPool;
if (pGlobalPool == NULL)
{
//DPFX(DPFPREP, 9, "Initializing global pool 0x%p.", this);
m_pcsLock = (DNCRITICAL_SECTION*) DNMalloc( sizeof(DNCRITICAL_SECTION) );
if (m_pcsLock == NULL)
{
fReturn = FALSE;
goto Exit;
}
if (! DNInitializeCriticalSection( m_pcsLock ))
{
DNFree( m_pcsLock );
DEBUG_ONLY( m_pcsLock = NULL );
fReturn = FALSE;
goto Exit;
}
}
DEBUG_ONLY( DNASSERT( m_fInitialized == FALSE ) );
DEBUG_ONLY( m_fInitialized = TRUE );
Exit:
return fReturn;
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedTLPool::Deinitialize - deinitialize pool
//
// Entry: Nothing
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPool::Deinitialize"
template< class T >
void CLockedTLPool< T >::Deinitialize( void )
{
CBilink * pBilink;
T * pItem;
pBilink = m_blItems.GetNext();
while ( pBilink != &m_blItems )
{
pItem = CONTAINING_OBJECT(pBilink, T, m_blList);
pBilink = pBilink->GetNext();
pItem->m_blList.RemoveFromList();
pItem->PoolDeallocFunction();
delete pItem;
#ifdef TRACK_POOL_STATS
m_dwDeallocations++;
#endif // TRACK_POOL_STATS
DEBUG_ONLY( m_dwNumItems-- );
}
DEBUG_ONLY( DNASSERT( m_fInitialized != FALSE ) );
DEBUG_ONLY( m_fInitialized = FALSE );
if (m_pcsLock != NULL)
{
//DPFX(DPFPREP, 9, "Deinitializing global pool 0x%p.", this);
DNDeleteCriticalSection( m_pcsLock );
DNFree( m_pcsLock );
DEBUG_ONLY( m_pcsLock = NULL );
}
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedTLPool::Get - get an item from the pool
//
// Entry: Nothing
//
// Exit: Pointer to item
// NULL = out of memory
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPool::Get"
template< class T >
T *CLockedTLPool< T >::Get( void )
{
CBilink * pBilink;
T * pReturn;
DNASSERT( m_fInitialized != FALSE );
DNASSERT( m_pGlobalPool != NULL );
//
// If the pool is empty, steal the ones in the global pool.
//
pBilink = m_blItems.GetNext();
if ( pBilink == &m_blItems )
{
DNEnterCriticalSection( m_pGlobalPool->m_pcsLock );
pBilink = m_pGlobalPool->m_blItems.GetNext();
if ( pBilink == &m_pGlobalPool->m_blItems )
{
//
// No items. Drop global pool lock and allocate a new one.
//
DNLeaveCriticalSection( m_pGlobalPool->m_pcsLock );
pReturn = new T;
if ( pReturn != NULL )
{
if ( pReturn->PoolAllocFunction() == FALSE )
{
delete pReturn;
pReturn = NULL;
goto Exit;
}
#ifdef TRACK_POOL_STATS
else
{
//
// Update counter.
//
m_dwAllocations++;
}
#endif // TRACK_POOL_STATS
}
else
{
pReturn = NULL;
goto Exit;
}
}
else
{
//
// Separate all the items from the global list.
// We still have a pointer to the orphaned items (pBilink).
//
m_pGlobalPool->m_blItems.RemoveFromList();
DNASSERT(m_pGlobalPool->m_dwNumItems > 0);
#ifdef TRACK_POOL_STATS
m_dwSlurpsFromGlobal++;
if ( m_pGlobalPool->m_dwNumItems > m_dwLargestSlurpFromGlobal )
{
m_dwLargestSlurpFromGlobal = m_pGlobalPool->m_dwNumItems;
}
#endif // TRACK_POOL_STATS
m_dwNumItems = m_pGlobalPool->m_dwNumItems - 1; // -1 because we need one right now
m_pGlobalPool->m_dwNumItems = 0;
//
// Drop the lock since we don't need the global pool anymore.
//
DNLeaveCriticalSection( m_pGlobalPool->m_pcsLock );
//
// Get the first item from the orphaned list.
//
pReturn = CONTAINING_OBJECT(pBilink, T, m_blList);
//
// If there was more than one item in the global pool, transfer
// the remaining orphaned items (after the first) to this pool.
//
if (pBilink != pBilink->GetNext())
{
pBilink = pBilink->GetNext();
pReturn->m_blList.RemoveFromList();
m_blItems.InsertBefore(pBilink);
}
}
}
else
{
pReturn = CONTAINING_OBJECT(pBilink, T, m_blList);
pBilink->RemoveFromList();
DNASSERT( m_dwNumItems > 0 );
m_dwNumItems--;
}
//
// If we're here, we have an entry (it was freshly created, or removed from
// some pool). Attempt to initialize it before passing it to the user.
//
if ( pReturn->PoolInitFunction() == FALSE )
{
pReturn->m_blList.InsertAfter( &m_blItems );
pReturn = NULL;
}
else
{
pReturn->AddRef();
#ifdef TRACK_POOL_STATS
//
// Update status counts.
//
m_dwRetrievals++;
pReturn->m_dwSourceThreadID = GetCurrentThreadId();
#endif // TRACK_POOL_STATS
}
Exit:
return pReturn;
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedTLPool::Release - return item to pool
//
// Entry: Pointer to item
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CLockedTLPool::Release"
template< class T >
void CLockedTLPool< T >::Release( T *const pItem )
{
DNASSERT( m_fInitialized != FALSE );
DNASSERT( m_pGlobalPool != NULL );
DNASSERT( pItem != NULL );
DBG_CASSERT( sizeof( BYTE* ) == sizeof( pItem ) );
#if defined(CHECK_FOR_DUPLICATE_CONTEXTCFPM_RELEASE) && defined(DEBUG)
DNASSERT( ! pItem->m_blList.IsListMember( &m_blItems ));
#endif // CHECK_FOR_DUPLICATE_CONTEXTCFPM_RELEASE
pItem->PoolReleaseFunction();
#ifdef TRACK_POOL_STATS
//
// Update status counts.
//
if (pItem->m_dwSourceThreadID == GetCurrentThreadId())
{
m_dwReturnsOnSameThread++;
}
else
{
m_dwReturnsOnDifferentThread++;
}
#endif // TRACK_POOL_STATS
#ifdef NO_POOLS
pItem->PoolDeallocFunction();
delete pItem;
#ifdef TRACK_POOL_STATS
m_dwDeallocations++;
#endif // TRACK_POOL_STATS
#else
pItem->m_blList.InsertAfter( &m_blItems );
m_dwNumItems++;
//
// If this pool has built up some extra items, return them to the
// global pool.
//
if ( m_dwNumItems >= 25 )
{
CBilink * pFirstItem;
//
// Save a pointer to the first item.
//
pFirstItem = m_blItems.GetNext();
DNASSERT( pFirstItem != &m_blItems );
//
// Orphan the items.
//
m_blItems.RemoveFromList();
//
// Take the lock and transfer the list to the global pool.
//
DNEnterCriticalSection( m_pGlobalPool->m_pcsLock );
m_pGlobalPool->m_blItems.AttachListBefore(pFirstItem);
m_pGlobalPool->m_dwNumItems += m_dwNumItems;
DNLeaveCriticalSection( m_pGlobalPool->m_pcsLock );
m_dwNumItems = 0;
#ifdef TRACK_POOL_STATS
m_dwDumpsToGlobal++;
#endif // TRACK_POOL_STATS
}
#endif // ! NO_POOLS
}
//**********************************************************************
//**********************************************************************
// ------------------------------
// CLockedTLPool::ReleaseWithoutPool - destroy an item without returning it
// to a pool
// NOTE: this is a static function
// and cannot use the 'this' pointer!
//
// Entry: Pointer to item
//
// Exit: Nothing
// ------------------------------
#undef DPF_MODNAME
#define DPF_MODNAME "CContextFixedTLPool::ReleaseWithoutPool"
template< class T >
void CLockedTLPool< T >::ReleaseWithoutPool( T *const pItem )
{
DNASSERT( pItem != NULL );
DBG_CASSERT( sizeof( BYTE* ) == sizeof( pItem ) );
DNASSERT( pItem->m_blList.IsEmpty() );
pItem->PoolReleaseFunction();
pItem->PoolDeallocFunction();
delete pItem;
}
//**********************************************************************
#ifdef __LOCAL_OFFSETOF_DEFINED__
#undef __LOCAL_OFFSETOF_DEFINED__
#undef OFFSETOF
#endif // __LOCAL_OFFSETOF_DEFINED__
#undef DPF_SUBCOMP
#undef DPF_MODNAME
#endif // __LOCKED_POOL__
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