void CUtlMemoryBase::Purge( int numElements, bool bRealloc )
{
Assert( numElements >= 0 );
if( numElements > m_nAllocationCount )
{
// Ensure this isn't a grow request in disguise.
Assert( numElements <= m_nAllocationCount );
return;
}
// If we have zero elements, simply do a purge:
if( numElements == 0 )
{
Purge();
return;
}
if ( IsExternallyAllocated() )
{
// Can't shrink a buffer whose memory was externally allocated, fail silently like purge
return;
}
// If the number of elements is the same as the allocation count, we are done.
if( numElements == m_nAllocationCount )
{
return;
}
if( !m_pMemory )
{
// Allocation count is non zero, but memory is null.
Assert( m_pMemory );
return;
}
if ( bRealloc )
{
UTLMEMORY_TRACK_FREE();
m_nAllocationCount = numElements;
UTLMEMORY_TRACK_ALLOC();
// Allocation count > 0, shrink it down.
MEM_ALLOC_CREDIT_CLASS();
m_pMemory = PvRealloc( m_pMemory, m_nAllocationCount * m_unSizeOfElements );
}
else
{
// Some of the tracking may be wrong as we are changing the size but are not reallocating.
m_nAllocationCount = numElements;
}
}
//-----------------------------------------------------------------------------
// Switches the buffer from an external memory buffer to a reallocatable buffer
//-----------------------------------------------------------------------------
void CUtlMemoryBase::ConvertToGrowableMemory( int nGrowSize )
{
if ( !IsExternallyAllocated() )
return;
m_nGrowSize = nGrowSize;
if (m_nAllocationCount)
{
UTLMEMORY_TRACK_ALLOC();
MEM_ALLOC_CREDIT_CLASS();
int nNumBytes = m_nAllocationCount * m_unSizeOfElements;
void *pMemory = PvAlloc( nNumBytes );
memcpy( pMemory, m_pMemory, nNumBytes );
m_pMemory = pMemory;
}
else
{
m_pMemory = NULL;
}
}
void CUtlVector<T, A>::EnsureCapacity(int num)
{
MEM_ALLOC_CREDIT_CLASS();
m_Memory.EnsureCapacity(num);
ResetDbgInfo();
}