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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34536 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2009-12-07 14:28:56 +00:00
parent be7328a9f6
commit 6440406a59
1 changed files with 79 additions and 78 deletions
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157
headers/private/kernel/vm/VMCache.h
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@ -57,109 +57,110 @@ typedef IteratableSplayTree<VMCachePagesTreeDefinition> VMCachePagesTree;
struct VMCache {
public:
VMCache();
virtual ~VMCache();
VMCache();
virtual ~VMCache();
status_t Init(uint32 cacheType);
status_t Init(uint32 cacheType);
virtual void Delete();
virtual void Delete();
bool Lock()
{ return mutex_lock(&fLock) == B_OK; }
bool TryLock()
{ return mutex_trylock(&fLock) == B_OK; }
bool SwitchLock(mutex* from)
{ return mutex_switch_lock(from, &fLock)
== B_OK; }
void Unlock();
void AssertLocked()
{ ASSERT_LOCKED_MUTEX(&fLock); }
bool Lock()
{ return mutex_lock(&fLock) == B_OK; }
bool TryLock()
{ return mutex_trylock(&fLock) == B_OK; }
bool SwitchLock(mutex* from)
{ return mutex_switch_lock(from, &fLock)
== B_OK; }
void Unlock();
void AssertLocked()
{ ASSERT_LOCKED_MUTEX(&fLock); }
void AcquireRefLocked();
void AcquireRef();
void ReleaseRefLocked();
void ReleaseRef();
void ReleaseRefAndUnlock()
{ ReleaseRefLocked(); Unlock(); }
void AcquireRefLocked();
void AcquireRef();
void ReleaseRefLocked();
void ReleaseRef();
void ReleaseRefAndUnlock()
{ ReleaseRefLocked(); Unlock(); }
vm_page* LookupPage(off_t offset);
void InsertPage(vm_page* page, off_t offset);
void RemovePage(vm_page* page);
vm_page* LookupPage(off_t offset);
void InsertPage(vm_page* page, off_t offset);
void RemovePage(vm_page* page);
void AddConsumer(VMCache* consumer);
void AddConsumer(VMCache* consumer);
status_t InsertAreaLocked(VMArea* area);
status_t RemoveArea(VMArea* area);
status_t InsertAreaLocked(VMArea* area);
status_t RemoveArea(VMArea* area);
status_t WriteModified();
status_t SetMinimalCommitment(off_t commitment);
status_t Resize(off_t newSize);
status_t WriteModified();
status_t SetMinimalCommitment(off_t commitment);
status_t Resize(off_t newSize);
status_t FlushAndRemoveAllPages();
status_t FlushAndRemoveAllPages();
// for debugging only
mutex* GetLock()
{ return &fLock; }
int32 RefCount() const
{ return fRefCount; }
mutex* GetLock()
{ return &fLock; }
int32 RefCount() const
{ return fRefCount; }
// backing store operations
virtual status_t Commit(off_t size);
virtual bool HasPage(off_t offset);
virtual status_t Commit(off_t size);
virtual bool HasPage(off_t offset);
virtual status_t Read(off_t offset, const iovec *vecs, size_t count,
uint32 flags, size_t *_numBytes);
virtual status_t Write(off_t offset, const iovec *vecs, size_t count,
uint32 flags, size_t *_numBytes);
virtual status_t WriteAsync(off_t offset, const iovec* vecs,
size_t count, size_t numBytes, uint32 flags,
AsyncIOCallback* callback);
virtual bool CanWritePage(off_t offset);
virtual status_t Read(off_t offset, const iovec *vecs,
size_t count,uint32 flags,
size_t *_numBytes);
virtual status_t Write(off_t offset, const iovec *vecs, size_t count,
uint32 flags, size_t *_numBytes);
virtual status_t WriteAsync(off_t offset, const iovec* vecs,
size_t count, size_t numBytes, uint32 flags,
AsyncIOCallback* callback);
virtual bool CanWritePage(off_t offset);
virtual int32 MaxPagesPerWrite() const
{ return -1; } // no restriction
virtual int32 MaxPagesPerAsyncWrite() const
{ return -1; } // no restriction
virtual int32 MaxPagesPerWrite() const
{ return -1; } // no restriction
virtual int32 MaxPagesPerAsyncWrite() const
{ return -1; } // no restriction
virtual status_t Fault(struct VMAddressSpace *aspace,
off_t offset);
virtual status_t Fault(struct VMAddressSpace *aspace,
off_t offset);
virtual void Merge(VMCache* source);
virtual void Merge(VMCache* source);
virtual status_t AcquireUnreferencedStoreRef();
virtual void AcquireStoreRef();
virtual void ReleaseStoreRef();
private:
inline bool _IsMergeable() const;
void _MergeWithOnlyConsumer();
void _RemoveConsumer(VMCache* consumer);
virtual status_t AcquireUnreferencedStoreRef();
virtual void AcquireStoreRef();
virtual void ReleaseStoreRef();
public:
struct VMArea* areas;
struct list_link consumer_link;
struct list consumers;
// list of caches that use this cache as a source
VMCachePagesTree pages;
VMCache* source;
off_t virtual_base;
off_t virtual_end;
off_t committed_size;
// TODO: Remove!
uint32 page_count;
uint32 temporary : 1;
uint32 scan_skip : 1;
uint32 type : 6;
VMArea* areas;
list_link consumer_link;
list consumers;
// list of caches that use this cache as a source
VMCachePagesTree pages;
VMCache* source;
off_t virtual_base;
off_t virtual_end;
off_t committed_size;
// TODO: Remove!
uint32 page_count;
uint32 temporary : 1;
uint32 scan_skip : 1;
uint32 type : 6;
#if DEBUG_CACHE_LIST
struct VMCache* debug_previous;
struct VMCache* debug_next;
VMCache* debug_previous;
VMCache* debug_next;
#endif
private:
int32 fRefCount;
mutex fLock;
inline bool _IsMergeable() const;
void _MergeWithOnlyConsumer();
void _RemoveConsumer(VMCache* consumer);
private:
int32 fRefCount;
mutex fLock;
};