/* Unlock a memory pointer so it can be released if there is no
references inside of harbour variables
*/
void * hb_gcUnlock( void * pBlock )
{
if( pBlock )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pBlock );
if( pAlloc->locked )
{
HB_GC_LOCK();
if( pAlloc->locked )
{
if( --pAlloc->locked == 0 )
{
pAlloc->used = s_uUsedFlag;
hb_gcUnlink( &s_pLockedBlock, pAlloc );
hb_gcLink( &s_pCurrBlock, pAlloc );
HB_GC_AUTO_INC();
}
}
HB_GC_UNLOCK();
}
}
return pBlock;
}
/* release a memory block allocated with hb_gcAlloc*() */
void hb_gcFree( void * pBlock )
{
if( pBlock )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pBlock );
/* Don't release the block that will be deleted during finalization */
if( ! ( pAlloc->used & HB_GC_DELETE ) )
{
HB_GC_LOCK();
if( pAlloc->locked )
hb_gcUnlink( &s_pLockedBlock, pAlloc );
else
{
hb_gcUnlink( &s_pCurrBlock, pAlloc );
HB_GC_AUTO_DEC();
}
HB_GC_UNLOCK();
HB_GARBAGE_FREE( pAlloc );
}
}
else
{
hb_errInternal( HB_EI_XFREENULL, NULL, NULL, NULL );
}
}
/* mark passed memory block as used so it will be not released by the GC */
void hb_gcMark( void * pBlock )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pBlock );
if( ( pAlloc->used & ~HB_GC_DELETE ) == s_uUsedFlag )
{
pAlloc->used ^= HB_GC_USED_FLAG; /* mark this codeblock as used */
pAlloc->pFuncs->mark( pBlock );
}
}
void hb_gcRefFree( void * pBlock )
{
if( pBlock )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pBlock );
if( hb_xRefDec( pAlloc ) )
{
/* Don't release the block that will be deleted during finalization */
if( ! ( pAlloc->used & HB_GC_DELETE ) )
{
pAlloc->used |= HB_GC_DELETE;
/* execute clean-up function */
pAlloc->pFuncs->clear( pBlock );
if( hb_xRefCount( pAlloc ) != 0 )
{
if( pAlloc->used & HB_GC_DELETE )
{
pAlloc->used = s_uUsedFlag;
if( hb_vmRequestQuery() == 0 )
hb_errRT_BASE( EG_DESTRUCTOR, 1301, NULL, "Reference to freed block", 0 );
}
}
else
{
HB_GC_LOCK();
if( pAlloc->locked )
hb_gcUnlink( &s_pLockedBlock, pAlloc );
else
{
hb_gcUnlink( &s_pCurrBlock, pAlloc );
HB_GC_AUTO_DEC();
}
HB_GC_UNLOCK();
HB_GARBAGE_FREE( pAlloc );
}
}
}
}
else
{
hb_errInternal( HB_EI_XFREENULL, NULL, NULL, NULL );
}
}
/* Lock a memory pointer so it will not be released if stored
outside of harbour variables
*/
void * hb_gcLock( void * pBlock )
{
if( pBlock )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pBlock );
HB_GC_LOCK();
if( ! pAlloc->locked )
{
hb_gcUnlink( &s_pCurrBlock, pAlloc );
hb_gcLink( &s_pLockedBlock, pAlloc );
HB_GC_AUTO_DEC();
}
++pAlloc->locked;
HB_GC_UNLOCK();
}
return pBlock;
}
void hb_gcAttach( void * pBlock )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pBlock );
if( pAlloc->locked )
{
HB_GC_LOCK();
if( pAlloc->locked )
{
if( --pAlloc->locked == 0 )
{
pAlloc->used = s_uUsedFlag;
hb_gcUnlink( &s_pLockedBlock, pAlloc );
hb_gcLink( &s_pCurrBlock, pAlloc );
HB_GC_AUTO_INC();
pAlloc = NULL;
}
}
HB_GC_UNLOCK();
}
if( pAlloc )
hb_xRefInc( pAlloc );
}
/* Mark a passed item as used so it will be not released by the GC
*/
void hb_gcItemRef( PHB_ITEM pItem )
{
while( HB_IS_BYREF( pItem ) )
{
if( HB_IS_ENUM( pItem ) )
return;
else if( HB_IS_EXTREF( pItem ) )
{
pItem->item.asExtRef.func->mark( pItem->item.asExtRef.value );
return;
}
else if( ! HB_IS_MEMVAR( pItem ) &&
pItem->item.asRefer.offset == 0 &&
pItem->item.asRefer.value >= 0 )
{
/* array item reference */
PHB_GARBAGE pAlloc = HB_GC_PTR( pItem->item.asRefer.BasePtr.array );
if( ( pAlloc->used & ~HB_GC_DELETE ) == s_uUsedFlag )
{
/* mark this array as used */
pAlloc->used ^= HB_GC_USED_FLAG;
/* mark also all array elements */
pAlloc->pFuncs->mark( HB_BLOCK_PTR( pAlloc ) );
}
return;
}
pItem = hb_itemUnRefOnce( pItem );
}
if( HB_IS_ARRAY( pItem ) )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pItem->item.asArray.value );
/* Check this array only if it was not checked yet */
if( ( pAlloc->used & ~HB_GC_DELETE ) == s_uUsedFlag )
{
/* mark this array as used so it will be no re-checked from
* other references
*/
pAlloc->used ^= HB_GC_USED_FLAG;
/* mark also all array elements */
pAlloc->pFuncs->mark( HB_BLOCK_PTR( pAlloc ) );
}
}
else if( HB_IS_HASH( pItem ) )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pItem->item.asHash.value );
/* Check this hash table only if it was not checked yet */
if( ( pAlloc->used & ~HB_GC_DELETE ) == s_uUsedFlag )
{
/* mark this hash table as used */
pAlloc->used ^= HB_GC_USED_FLAG;
/* mark also all hash elements */
pAlloc->pFuncs->mark( HB_BLOCK_PTR( pAlloc ) );
}
}
else if( HB_IS_BLOCK( pItem ) )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pItem->item.asBlock.value );
if( ( pAlloc->used & ~HB_GC_DELETE ) == s_uUsedFlag )
{
/* mark this codeblock as used */
pAlloc->used ^= HB_GC_USED_FLAG;
/* mark as used all detached variables in a codeblock */
pAlloc->pFuncs->mark( HB_BLOCK_PTR( pAlloc ) );
}
}
else if( HB_IS_POINTER( pItem ) )
{
if( pItem->item.asPointer.collect )
{
PHB_GARBAGE pAlloc = HB_GC_PTR( pItem->item.asPointer.value );
if( ( pAlloc->used & ~HB_GC_DELETE ) == s_uUsedFlag )
{
/* mark this memory block as used */
pAlloc->used ^= HB_GC_USED_FLAG;
/* mark also all internal user blocks attached to this block */
pAlloc->pFuncs->mark( HB_BLOCK_PTR( pAlloc ) );
}
}
}
/* all other data types don't need the GC */
}
HB_COUNTER hb_gcRefCount( void * pBlock )
{
return hb_xRefCount( HB_GC_PTR( pBlock ) );
}
void hb_gcRefInc( void * pBlock )
{
hb_xRefInc( HB_GC_PTR( pBlock ) );
}
/* return cleanup function pointer */
const HB_GC_FUNCS * hb_gcFuncs( void * pBlock )
{
return HB_GC_PTR( pBlock )->pFuncs;
}
/* return cleanup function pointer */
HB_GARBAGE_FUNC_PTR hb_gcFunc( void *pBlock )
{
return HB_GC_PTR( pBlock )->pFunc;
}
