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29 #ifndef PageAllocatorSymbian_h
30 #define PageAllocatorSymbian_h
33 #include <wtf/Bitmap.h>
39 // Convenience wrapper around an RChunk
40 class SymbianChunk : public RChunk {
43 SymbianChunk(TInt handle)
46 // prevent kernel calls by caching these
47 m_base = reinterpret_cast<char*>(Base());
48 m_maxSize = MaxSize();
53 Decommit(0, m_maxSize);
57 // checks if address is in chunk's virtual address space
58 bool contains(const void* address) const
60 return (static_cast<const char*>(address) >= m_base && static_cast<const char*>(address) < (m_base + m_maxSize));
68 // Size of the large up-front reservation
70 // Emulator has limited virtual address space
71 const size_t largeReservationSize = 96*1024*1024;
73 // HW has plenty of virtual addresses
74 const size_t largeReservationSize = 256*1024*1024;
77 class PageAllocatorSymbian {
80 PageAllocatorSymbian();
81 ~PageAllocatorSymbian();
83 void* reserve(size_t);
84 void release(void*, size_t);
85 bool commit(void*, size_t);
86 bool decommit(void*, size_t);
88 bool contains(const void*) const;
91 static const size_t m_pageSize = 4096;
92 SymbianChunk* m_chunk;
93 Bitmap<largeReservationSize / m_pageSize> m_map;
99 #endif // PageAllocatorSymbian_h