161 lines
4.8 KiB
C++
161 lines
4.8 KiB
C++
/****************************************************************************
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Copyright (c) 2009, Radon Labs GmbH
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Copyright (c) 2011-2013,WebJet Business Division,CYOU
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http://www.genesis-3d.com.cn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#if WIN32
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#include "stdneb.h"
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#include "memory/win360/win360memorypool.h"
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#include "util/string.h"
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namespace Win360
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{
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using namespace Util;
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//------------------------------------------------------------------------------
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/**
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*/
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Win360MemoryPool::Win360MemoryPool() :
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heapType(Memory::InvalidHeapType),
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blockSize(0),
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alignedBlockSize(0),
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poolSize(0),
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numBlocks(0),
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#if NEBULA3_MEMORY_STATS
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allocCount(0),
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#endif
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poolStart(0),
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poolEnd(0)
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{
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Memory::Clear(&this->listHead, sizeof(this->listHead));
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}
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//------------------------------------------------------------------------------
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/**
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*/
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Win360MemoryPool::~Win360MemoryPool()
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{
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#if NEBULA3_MEMORY_STATS
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if (this->allocCount != 0)
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{
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String str;
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str.Format("Win360MemoryPool: %d memory leaks in pool '0x%08x'!\n", this->allocCount, (uint)this);
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Core::SysFunc::DebugOut(str.AsCharPtr());
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}
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#endif
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// discard memory pool
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Memory::Free(this->heapType, this->poolStart);
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this->poolStart = 0;
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this->poolEnd = 0;
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}
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//------------------------------------------------------------------------------
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/**
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NOTE: name must be a static string!
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*/
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void
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Win360MemoryPool::Setup(Memory::HeapType heapType_, uint blockSize_, uint numBlocks_)
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{
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n_assert(0 == this->poolStart);
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n_assert(0 == this->poolEnd);
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this->blockSize = blockSize_;
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this->numBlocks = numBlocks_;
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this->heapType = heapType_;
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#if NEBULA3_MEMORY_STATS
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this->allocCount = 0;
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#endif
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// compute block size with sizeof(*) header
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this->alignedBlockSize = ComputeAlignedBlockSize(this->blockSize);
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this->poolSize = (this->numBlocks * this->alignedBlockSize) + BlockAlign;
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// setup pool memory block, each entry in the block has a header
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// with a pointer to the next block, the actual start of the memory block
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// is 16-byte-aligned
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this->poolStart = (ubyte*) Memory::Alloc(this->heapType, this->poolSize);
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this->poolEnd = this->poolStart + this->poolSize;
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// setup forward-linked free-block-list
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Memory::Clear(&this->listHead, sizeof(listHead));
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PSLIST_ENTRY listEntry = (PSLIST_ENTRY) (this->poolStart + (BlockAlign - sizeof(SLIST_ENTRY)));
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uint i;
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for (i = 0; i < this->numBlocks; i++)
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{
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InterlockedPushEntrySList(&this->listHead, listEntry);
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listEntry += this->alignedBlockSize / sizeof(SLIST_ENTRY);
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}
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}
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//------------------------------------------------------------------------------
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/**
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*/
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void*
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Win360MemoryPool::Alloc()
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{
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#if NEBULA3_MEMORY_STATS
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_InterlockedIncrement(&this->allocCount);
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#endif
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// get the next free block from the free list and fixup the free list
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PSLIST_ENTRY entry = InterlockedPopEntrySList(&this->listHead);
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if (0 == entry)
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{
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return 0;
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}
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void* ptr = (void*) (((ubyte*)entry) + sizeof(SLIST_ENTRY));
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// fill with debug pattern
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#if NEBULA3_DEBUG
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Memory::Fill(ptr, this->blockSize, NewBlockPattern);
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#endif
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return ptr;
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}
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//------------------------------------------------------------------------------
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/**
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*/
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void
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Win360MemoryPool::Free(void* ptr)
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{
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#if NEBULA3_MEMORY_STATS
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n_assert(this->allocCount > 0);
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_InterlockedDecrement(&this->allocCount);
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#endif
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// get pointer to header and fixup free list
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PSLIST_ENTRY entry = (PSLIST_ENTRY) (((ubyte*)ptr) - sizeof(SLIST_ENTRY));
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InterlockedPushEntrySList(&this->listHead, entry);
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// fill free'd block with debug pattern
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#if NEBULA3_DEBUG
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Memory::Fill(ptr, this->blockSize, FreeBlockPattern);
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#endif
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}
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} // namespace Win360
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#endif |