Question

我正在尝试使用kernel32.dll中存在的GetPhysicallyInstalledSystemMemory方法。

它需要PULONGLONG类型的单个参数，但我不知道如何将其映射到golang变量。这是我当前的尝试导致“错误：参数不正确”。

任何人都可以解释如何做到这一点吗？

package main

import (
    "fmt"
    "syscall"
)

var memory uintptr

func main() {
    kernel32 := syscall.NewLazyDLL("kernel32.dll")
    getPhysicallyInstalledSystemMemoryProc := kernel32.NewProc("GetPhysicallyInstalledSystemMemory")

    ret, _, err := getPhysicallyInstalledSystemMemoryProc.Call(uintptr(memory))
    fmt.Printf("GetPhysicallyInstalledSystemMemory, return: %+v\n", ret)
    fmt.Printf("GetPhysicallyInstalledSystemMemory, memory: %d\n", memory)
    fmt.Printf("GetPhysicallyInstalledSystemMemory, err: %s\n", err)

}

Answer 1

PULONGLONG参数类型转换为*uint64
您必须将memory变量的地址转换为unsafe.Pointer类型，然后转换为uintptr

package main

import (
    "fmt"
    "syscall"
    "unsafe"
)

func main() {
    kernel32 := syscall.NewLazyDLL("kernel32.dll")
    getPhysicallyInstalledSystemMemoryProc := kernel32.NewProc("GetPhysicallyInstalledSystemMemory")

    var memory uint64

    ret, _, err := getPhysicallyInstalledSystemMemoryProc.Call(uintptr(unsafe.Pointer(&memory)))
    fmt.Printf("GetPhysicallyInstalledSystemMemory, return: %+v\n", ret)
    fmt.Printf("GetPhysicallyInstalledSystemMemory, memory: %d\n", memory)
    fmt.Printf("GetPhysicallyInstalledSystemMemory, err: %s\n", err)

}

如何使用Windows DLL方法

1 个答案: