Golang1.7使用kernel32.dll 读取共享内存,代码小示例
发布时间:2020-12-16 18:29:05 所属栏目:大数据 来源:网络整理
导读:package main import ( "fmt" "syscall" "unsafe" ) func main() { ShareMemName,_ := syscall.BytePtrFromString( "ShareMemory" ) //ShareMemory共享内存名称. var sharememname = uintptr (unsafe.Pointer(ShareMemName)) kernet32 := syscall.NewLazyDLL
package main
import (
"fmt"
"syscall"
"unsafe"
)
func main() {
ShareMemName,_ := syscall.BytePtrFromString("ShareMemory") //ShareMemory共享内存名称.
var sharememname = uintptr(unsafe.Pointer(ShareMemName))
kernet32 := syscall.NewLazyDLL("kernel32.dll")
OpenFileMapping := kernet32.NewProc("OpenFileMappingA")
ptr,_,err := OpenFileMapping.Call(0x0004, 0,sharememname) //0x0004 表示只读
if err.Error() != "The operation completed successfully." {
fmt.Println("This:",err)
return
}
ptr,err = syscall.MapViewOfFile(syscall.Handle(ptr), 0x0004, 0)
if err != nil {
fmt.Println("There:",err)
return
}
buf := *(*[60]byte)(unsafe.Pointer(ptr)) //我共享内存里面使用的是字符串所以这里映射成[:]byte array
fmt.Println(string(buf[:]))
err = syscall.UnmapViewOfFile(ptr)
fmt.Println(err)
}
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