Golang

C语言的通用类型指针交换是相当简单的，只需要将指针类型统一转成void*即可，Golang也有一种类似的操作，但是稍微麻烦一点：


package main

import (
	"fmt"
	"sync/atomic"
	"unsafe"
)

func swapPointer(readPointer *unsafe.Pointer, writePointer *unsafe.Pointer) {

	*writePointer = atomic.SwapPointer(readPointer, *writePointer)
}

func main() {
	var a int = 1
	var b int = 2

	var readPointer *int = &a
	var writePointer *int = &b

	fmt.Println(*readPointer)
	fmt.Println(*writePointer)

	swapPointer((*unsafe.Pointer)(unsafe.Pointer(&readPointer)), (*unsafe.Pointer)(unsafe.Pointer(&writePointer)))

	fmt.Println("------------")
	fmt.Println(*readPointer)
	fmt.Println(*writePointer)
}

package main

import (

"fmt"

"sync/atomic"

"unsafe"

)

func swapPointer(readPointer *unsafe.Pointer, writePointer *unsafe.Pointer) {

*writePointer = atomic.SwapPointer(readPointer, *writePointer)

}

func main() {

var a int = 1

var b int = 2

var readPointer *int = &a

var writePointer *int = &b

fmt.Println(*readPointer)

fmt.Println(*writePointer)

swapPointer((*unsafe.Pointer)(unsafe.Pointer(&readPointer)), (*unsafe.Pointer)(unsafe.Pointer(&writePointer)))

fmt.Println("------------")

fmt.Println(*readPointer)

fmt.Println(*writePointer)

}

Golang 通用类型指针交换

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