15c99d639SIngo Weinhold /* 2f8154d17SIngo Weinhold * Copyright 2008-2011, Ingo Weinhold, ingo_weinhold@gmx.de. 35c99d639SIngo Weinhold * Copyright 2004-2007, Axel Dörfler, axeld@pinc-software.de. 45c99d639SIngo Weinhold * Distributed under the terms of the MIT License. 55c99d639SIngo Weinhold * 65c99d639SIngo Weinhold * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 75c99d639SIngo Weinhold * Distributed under the terms of the NewOS License. 85c99d639SIngo Weinhold */ 9c586076dSIngo Weinhold #ifndef _KERNEL_VM_STORE_ANONYMOUS_NO_SWAP_H 10c586076dSIngo Weinhold #define _KERNEL_VM_STORE_ANONYMOUS_NO_SWAP_H 115c99d639SIngo Weinhold 12be7328a9SIngo Weinhold 13be7328a9SIngo Weinhold #include <vm/VMCache.h> 145c99d639SIngo Weinhold 155c99d639SIngo Weinhold 165c99d639SIngo Weinhold class VMAnonymousNoSwapCache : public VMCache { 175c99d639SIngo Weinhold public: 185c99d639SIngo Weinhold virtual ~VMAnonymousNoSwapCache(); 195c99d639SIngo Weinhold 20ab3d6a3eSIngo Weinhold status_t Init(bool canOvercommit, 21ab3d6a3eSIngo Weinhold int32 numPrecommittedPages, 22ab3d6a3eSIngo Weinhold int32 numGuardPages, 23ab3d6a3eSIngo Weinhold uint32 allocationFlags); 245c99d639SIngo Weinhold 25cff6e9e4SIngo Weinhold virtual status_t Commit(off_t size, int priority); 265c99d639SIngo Weinhold virtual bool HasPage(off_t offset); 275c99d639SIngo Weinhold 28*d1f280c8SHamish Morrison virtual int32 GuardSize() { return fGuardedSize; } 29*d1f280c8SHamish Morrison 30ab3d6a3eSIngo Weinhold virtual status_t Read(off_t offset, const iovec* vecs, 31ab3d6a3eSIngo Weinhold size_t count, uint32 flags, 32ab3d6a3eSIngo Weinhold size_t* _numBytes); 33ab3d6a3eSIngo Weinhold virtual status_t Write(off_t offset, const iovec* vecs, 34ab3d6a3eSIngo Weinhold size_t count, uint32 flags, 35ab3d6a3eSIngo Weinhold size_t* _numBytes); 365c99d639SIngo Weinhold 37ab3d6a3eSIngo Weinhold virtual status_t Fault(struct VMAddressSpace* aspace, 38ab3d6a3eSIngo Weinhold off_t offset); 395c99d639SIngo Weinhold 405c99d639SIngo Weinhold virtual void MergeStore(VMCache* source); 415c99d639SIngo Weinhold 42f8154d17SIngo Weinhold protected: 43f8154d17SIngo Weinhold virtual void DeleteObject(); 44f8154d17SIngo Weinhold 455c99d639SIngo Weinhold private: 465c99d639SIngo Weinhold bool fCanOvercommit; 475c99d639SIngo Weinhold bool fHasPrecommitted; 485c99d639SIngo Weinhold uint8 fPrecommittedPages; 495c99d639SIngo Weinhold int32 fGuardedSize; 505c99d639SIngo Weinhold }; 515c99d639SIngo Weinhold 525c99d639SIngo Weinhold 53c586076dSIngo Weinhold #endif /* _KERNEL_VM_STORE_ANONYMOUS_NO_SWAP_H */ 54