haiku/headers/private/package/hpkg/BlockBufferCache.h
Oliver Tappe 0d6b3b20e1 More work on package kit:
* added class BPackageInfo, which contains packaging attributes of
  a package (the values relevant for package management) 
* implemented parser (mostly) for reading a BPackageInfo from a config
  file (.PackageInfo) in order to pass them on to the PackageWriter 
  when creating a package
* pulled hpkg-related stuff from bin/package into the package kit
* adjusted packagefs-Volume to skip .PackageInfo files when populating
  the mountpoint, as those files shouldn't appear as part of an
  activated package


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40301 a95241bf-73f2-0310-859d-f6bbb57e9c96
2011-01-27 23:17:03 +00:00

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1.5 KiB
C++

/*
* Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
* Distributed under the terms of the MIT License.
*/
#ifndef _PACKAGE__HPKG__BLOCK_BUFFER_CACHE_H_
#define _PACKAGE__HPKG__BLOCK_BUFFER_CACHE_H_
#include <package/hpkg/BufferCache.h>
namespace BPackageKit {
namespace BHaikuPackage {
namespace BPrivate {
class BlockBufferCache : public BufferCache {
public:
BlockBufferCache(size_t blockSize,
uint32 maxCachedBlocks);
virtual ~BlockBufferCache();
virtual status_t Init();
virtual CachedBuffer* GetBuffer(size_t size,
CachedBuffer** owner = NULL,
bool* _newBuffer = NULL);
virtual void PutBufferAndCache(CachedBuffer** owner);
virtual void PutBuffer(CachedBuffer** owner);
virtual bool Lock() = 0;
virtual void Unlock() = 0;
private:
typedef DoublyLinkedList<CachedBuffer> BufferList;
private:
CachedBuffer* _AllocateBuffer(size_t size,
CachedBuffer** owner, bool* _newBuffer);
// object must not be locked
private:
size_t fBlockSize;
uint32 fMaxCachedBlocks;
uint32 fAllocatedBlocks;
BufferList fUnusedBuffers;
BufferList fCachedBuffers;
};
class BlockBufferCacheNoLock : public BlockBufferCache {
public:
BlockBufferCacheNoLock(size_t blockSize,
uint32 maxCachedBlocks);
virtual ~BlockBufferCacheNoLock();
virtual bool Lock();
virtual void Unlock();
};
} // namespace BPrivate
} // namespace BHaikuPackage
} // namespace BPackageKit
#endif // _PACKAGE__HPKG__BLOCK_BUFFER_CACHE_H_