khanat-opennel-code/code/nel/src/3d/ps_allocator.cpp
acemtp@users.sourceforge.net d5c601ffa5 initial version
2010-05-06 02:08:41 +02:00

73 lines
2.5 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 "std3d.h"
#include "nel/3d/particle_system_process.h"
#include "nel/3d/ps_allocator.h"
namespace NL3D
{
#ifdef PS_FAST_ALLOC
uint NumPSAlloc = 0;
uint NumDealloc = 0;
NLMISC::CContiguousBlockAllocator *PSBlockAllocator= NULL;
static std::allocator<uint8> PSStdAllocator;
//
typedef NLMISC::CContiguousBlockAllocator *TBlocAllocPtr;
//
struct CPSAllocInfo
{
size_t NumAllocatedBytes;
TBlocAllocPtr BlocAllocator; // may be NULL if was allocated from stl allocator
};
//
void *PSFastMemAlloc(uint numBytes)
{
NL_PS_FUNC(PSFastMemAlloc)
CPSAllocInfo *result;
// if a block allocator is available, use it
if (PSBlockAllocator)
{
result = (CPSAllocInfo *) PSBlockAllocator->alloc(numBytes + sizeof(CPSAllocInfo));
result->BlocAllocator = PSBlockAllocator; // mark as a block from block allocator
}
else
{
result = (CPSAllocInfo *) PSStdAllocator.allocate(numBytes + sizeof(CPSAllocInfo));
result->BlocAllocator = NULL;
}
result->NumAllocatedBytes = numBytes;
return (void *) (result + 1); // usable space starts after header
}
void PSFastMemFree(void *block)
{
NL_PS_FUNC(PSFastMemFree)
uint8 *realAddress = (uint8 *) ((uint8 *) block - sizeof(CPSAllocInfo));
CPSAllocInfo *ai = (CPSAllocInfo *) realAddress;
if (ai->BlocAllocator)
{
// block comes from a block allocator
ai->BlocAllocator->free((void *) realAddress, ai->NumAllocatedBytes + sizeof(CPSAllocInfo));
}
else
{
// block comes from the stl allocator
PSStdAllocator.deallocate((uint8 *) realAddress, ai->NumAllocatedBytes + sizeof(CPSAllocInfo));
}
}
#endif
}