将切片转换为数组指针

Question

I have this bit of code,

var buffers [2]uint32
gl.GenBuffers(2, /* What here! */)

gl.GenBuffers() asks for a int32 and a *uint32. In C, you'd pass an static array or a pointer to it and all would be good, but in Golang, a slice doesn't work...

Two ways I can think of are allocating a dynamic array, or converting the slice into a pointer array,

Bad thing is that I don't know how to do either... I tried new, but it doesn't really work like malloc... I'm stumped and any help would be greatly appeciated!

Answer 1

Write:

var buffers [2]uint32
gl.GenBuffers(int32(len(buffers)), &buffers[0])

For example,

package main

import (
    "fmt"
)

func main() {
    var buffers [2]uint32
    fmt.Printf("%d %p
", int32(len(buffers)), &buffers[0])
    fmt.Printf("%T %T
", int32(len(buffers)), &buffers[0])
}

Playground: https://play.golang.org/p/J-tKynWv5P1

Output:

2 0x10410020
int32 *uint32