56 lines
1.3 KiB
Go
56 lines
1.3 KiB
Go
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package vmem
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const (
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memDecommit = 0x4000
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memRelease = 0x8000
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)
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type systemInfo struct {
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wProcessorArchitecture uint16
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wReserved uint16
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dwPageSize uint32
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lpMinimumApplicationAddress uintptr
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lpMaximumApplicationAddress uintptr
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dwActiveProcessorMask uintptr
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dwNumberOfProcessors uint32
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dwProcessorType uint32
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dwAllocationGranularity uint32
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wProcessorLevel uint16
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wProcessorRevision uint16
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}
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// Enumeration of allocation type values.
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const (
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MemCommit = 0x00001000
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MemReserve = 0x00002000
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MemReset = 0x00080000
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MemResetUndo = 0x10000000
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)
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// Enumeration of protection levels.
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const (
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PageNoAccess = 0x01
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PageReadOnly = 0x02
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PageReadWrite = 0x04
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PageWriteCopy = 0x08
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PageExecute = 0x10
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PageExecuteRead = 0x20
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PageExecuteReadWrite = 0x40
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PageExecuteWriteCopy = 0x80
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)
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// RoundDown rounds an address up to a given multiple of size. Size must be a
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// power of two.
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func RoundDown(addr uint64, size uint64) uint64 {
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if size&(size-1) != 0 {
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panic("alignment size is not a power of two")
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}
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return addr &^ (size - 1)
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}
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// RoundUp rounds an address up to a given multiple of size. Size must be a
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// power of two.
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func RoundUp(addr uint64, size uint64) uint64 {
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return RoundDown(addr+size-1, size)
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}
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