mirror of
https://port.numenaute.org/aleajactaest/khanat-code-old.git
synced 2024-10-01 06:18:30 +00:00
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
|
|
// Copyright (C) 2010 Winch Gate Property Limited
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as
|
|
// published by the Free Software Foundation, either version 3 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#include "stdmisc.h"
|
|
#include "nel/misc/contiguous_block_allocator.h"
|
|
|
|
namespace NLMISC
|
|
{
|
|
|
|
// *********************************************************************************************************
|
|
CContiguousBlockAllocator::CContiguousBlockAllocator()
|
|
{
|
|
_BlockStart = NULL;
|
|
_NextAvailablePos = NULL;
|
|
_BlockEnd = 0;
|
|
_NumAllocatedBytes = 0;
|
|
#ifdef NL_DEBUG
|
|
_NumAlloc = 0;
|
|
_NumFree = 0;
|
|
#endif
|
|
}
|
|
|
|
// *********************************************************************************************************
|
|
CContiguousBlockAllocator::~CContiguousBlockAllocator()
|
|
{
|
|
init(0);
|
|
}
|
|
|
|
// *********************************************************************************************************
|
|
void CContiguousBlockAllocator::init(uint numBytes /*=0*/)
|
|
{
|
|
if (_BlockStart) _DefaultAlloc.deallocate(_BlockStart, _BlockEnd - _BlockStart);
|
|
_BlockEnd = NULL;
|
|
_BlockStart = NULL;
|
|
_NumAllocatedBytes = 0;
|
|
_NextAvailablePos = NULL;
|
|
if (numBytes != 0)
|
|
{
|
|
_BlockStart = _DefaultAlloc.allocate(numBytes);
|
|
_NextAvailablePos = _BlockStart;
|
|
_BlockEnd = _BlockStart + numBytes;
|
|
_NumAllocatedBytes = 0;
|
|
}
|
|
#ifdef NL_DEBUG
|
|
_NumAlloc = 0;
|
|
_NumFree = 0;
|
|
#endif
|
|
}
|
|
|
|
// *********************************************************************************************************
|
|
void *CContiguousBlockAllocator::alloc(uint numBytes)
|
|
{
|
|
if (numBytes == 0) return NULL;
|
|
_NumAllocatedBytes += numBytes;
|
|
if (_BlockStart)
|
|
{
|
|
if (_NextAvailablePos + numBytes <= _BlockEnd)
|
|
{
|
|
uint8 *block = _NextAvailablePos;
|
|
_NextAvailablePos += numBytes;
|
|
#ifdef NL_DEBUG
|
|
++ _NumAlloc;
|
|
#endif
|
|
return block;
|
|
}
|
|
}
|
|
// just uses standard new
|
|
#ifdef NL_DEBUG
|
|
++ _NumAlloc;
|
|
#endif
|
|
return _DefaultAlloc.allocate(numBytes);
|
|
}
|
|
|
|
// *********************************************************************************************************
|
|
void CContiguousBlockAllocator::free(void *block, uint numBytes)
|
|
{
|
|
if (!block) return;
|
|
#ifdef NL_DEBUG
|
|
++ _NumFree;
|
|
#endif
|
|
// no-op if block not inside the big block (sub-block are never deallocated until init(0) is encountered)
|
|
if (block < _BlockStart || block >= _BlockEnd)
|
|
{
|
|
// the block was allocated with std allocator
|
|
_DefaultAlloc.deallocate((uint8 *) block, numBytes);
|
|
}
|
|
}
|
|
|
|
} // NLMISC
|