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// MemBlocks.h
#ifndef __MEMBLOCKS_H
#define __MEMBLOCKS_H
extern "C"
{
#include "../../../C/Alloc.h"
}
#include "Common/Types.h"
#include "Common/MyVector.h"
#include "Windows/Synchronization.h"
#include "../IStream.h"
class CMemBlockManager
{
void *_data;
size_t _blockSize;
void *_headFree;
public:
CMemBlockManager(size_t blockSize = (1 << 20)): _data(0), _blockSize(blockSize), _headFree(0) {}
~CMemBlockManager() { FreeSpace(); }
bool AllocateSpace(size_t numBlocks);
void FreeSpace();
size_t GetBlockSize() const { return _blockSize; }
void *AllocateBlock();
void FreeBlock(void *p);
};
class CMemBlockManagerMt: public CMemBlockManager
{
NWindows::NSynchronization::CCriticalSection _criticalSection;
public:
NWindows::NSynchronization::CSemaphore Semaphore;
CMemBlockManagerMt(size_t blockSize = (1 << 20)): CMemBlockManager(blockSize) {}
~CMemBlockManagerMt() { FreeSpace(); }
HRes AllocateSpace(size_t numBlocks, size_t numNoLockBlocks = 0);
HRes AllocateSpaceAlways(size_t desiredNumberOfBlocks, size_t numNoLockBlocks = 0);
void FreeSpace();
void *AllocateBlock();
void FreeBlock(void *p, bool lockMode = true);
HRes ReleaseLockedBlocks(int number) { return Semaphore.Release(number); }
};
class CMemBlocks
{
void Free(CMemBlockManagerMt *manager);
public:
CRecordVector<void *> Blocks;
UInt64 TotalSize;
CMemBlocks(): TotalSize(0) {}
void FreeOpt(CMemBlockManagerMt *manager);
HRESULT WriteToStream(size_t blockSize, ISequentialOutStream *outStream) const;
};
struct CMemLockBlocks: public CMemBlocks
{
bool LockMode;
CMemLockBlocks(): LockMode(true) {};
void Free(CMemBlockManagerMt *memManager);
void FreeBlock(int index, CMemBlockManagerMt *memManager);
HRes SwitchToNoLockMode(CMemBlockManagerMt *memManager);
void Detach(CMemLockBlocks &blocks, CMemBlockManagerMt *memManager);
};
#endif
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