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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"syscall"
"unsafe"
)
var (
modkernel32 = syscall.NewLazyDLL("kernel32.dll")
procGetSystemInfo = modkernel32.NewProc("GetSystemInfo")
)
// see http://msdn.microsoft.com/en-us/library/windows/desktop/ms724958(v=vs.85).aspx
type systeminfo struct {
wProcessorArchitecture uint16
wReserved uint16
dwPageSize uint32
lpMinimumApplicationAddress uintptr
lpMaximumApplicationAddress uintptr
dwActiveProcessorMask uintptr
dwNumberOfProcessors uint32
dwProcessorType uint32
dwAllocationGranularity uint32
wProcessorLevel uint16
wProcessorRevision uint16
}
const (
PROCESSOR_ARCHITECTURE_AMD64 = 9
PROCESSOR_ARCHITECTURE_INTEL = 0
)
var sysinfo systeminfo
func sysinit() {
syscall.Syscall(procGetSystemInfo.Addr(), 1, uintptr(unsafe.Pointer(&sysinfo)), 0, 0)
switch sysinfo.wProcessorArchitecture {
case PROCESSOR_ARCHITECTURE_AMD64:
gohostarch = "amd64"
case PROCESSOR_ARCHITECTURE_INTEL:
gohostarch = "386"
default:
fatalf("unknown processor architecture")
}
}
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