2c1886aeae
link to them. * VM{Kernel,User}AddressSpace manage the respective VMArea subclass now, and VMAddressSpace has grown factory methods {Create,Delete}Area. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34493 a95241bf-73f2-0310-859d-f6bbb57e9c96
130 lines
2.8 KiB
C++
130 lines
2.8 KiB
C++
/*
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* Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
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* Copyright 2002-2009, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*
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* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_VM_VM_AREA_H
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#define _KERNEL_VM_VM_AREA_H
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#include <lock.h>
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#include <util/DoublyLinkedList.h>
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#include <util/OpenHashTable.h>
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#include <vm/vm_types.h>
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struct VMAddressSpace;
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struct VMCache;
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struct VMKernelAddressSpace;
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struct VMUserAddressSpace;
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struct VMArea {
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char* name;
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area_id id;
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uint32 protection;
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uint16 wiring;
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uint16 memory_type;
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VMCache* cache;
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vint32 no_cache_change;
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off_t cache_offset;
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uint32 cache_type;
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VMAreaMappings mappings;
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uint8* page_protections;
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struct VMAddressSpace* address_space;
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struct VMArea* cache_next;
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struct VMArea* cache_prev;
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struct VMArea* hash_next;
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addr_t Base() const { return fBase; }
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size_t Size() const { return fSize; }
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bool ContainsAddress(addr_t address) const
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{ return address >= fBase
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&& address <= fBase + (fSize - 1); }
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protected:
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VMArea(VMAddressSpace* addressSpace,
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uint32 wiring, uint32 protection);
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~VMArea();
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status_t Init(const char* name);
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protected:
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friend class VMAddressSpace;
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friend class VMKernelAddressSpace;
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friend class VMUserAddressSpace;
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protected:
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void SetBase(addr_t base) { fBase = base; }
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void SetSize(size_t size) { fSize = size; }
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protected:
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addr_t fBase;
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size_t fSize;
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};
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struct VMAreaHashDefinition {
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typedef area_id KeyType;
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typedef VMArea ValueType;
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size_t HashKey(area_id key) const
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{
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return key;
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}
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size_t Hash(const VMArea* value) const
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{
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return HashKey(value->id);
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}
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bool Compare(area_id key, const VMArea* value) const
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{
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return value->id == key;
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}
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VMArea*& GetLink(VMArea* value) const
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{
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return value->hash_next;
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}
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};
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typedef BOpenHashTable<VMAreaHashDefinition> VMAreaHashTable;
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struct VMAreaHash {
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static status_t Init();
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static status_t ReadLock()
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{ return rw_lock_read_lock(&sLock); }
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static void ReadUnlock()
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{ rw_lock_read_unlock(&sLock); }
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static status_t WriteLock()
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{ return rw_lock_write_lock(&sLock); }
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static void WriteUnlock()
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{ rw_lock_write_unlock(&sLock); }
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static VMArea* LookupLocked(area_id id)
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{ return sTable.Lookup(id); }
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static VMArea* Lookup(area_id id);
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static area_id Find(const char* name);
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static void Insert(VMArea* area);
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static void Remove(VMArea* area);
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static VMAreaHashTable::Iterator GetIterator()
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{ return sTable.GetIterator(); }
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private:
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static rw_lock sLock;
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static VMAreaHashTable sTable;
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};
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#endif // _KERNEL_VM_VM_AREA_H
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