cgo_structs.go

package main

// #include <stdio.h>
//
// typedef struct Box {
// 	unsigned int width;
// 	unsigned int height;
// 	float weight;
// 	const char *name;
// } Box;
//
// void checkBoxes(Box **box, unsigned int size) {
// 	for (int i = 0; i < size; i++) {
// 		printf("got a box %dx%d %flb, contents: '%s'\n", box[i]->width, box[i]->height, box[i]->weight, box[i]->name);
// 	}
// }
import "C"
import "unsafe"

func main() {
	CheckBoxes([]*Box{
		{
			Width: 10, Height: 5,
			Weight: 10.99,
			Name:   "Cozy lamp",
		}, {
			Width: 6, Height: 6,
			Weight: 5.0,
			Name:   "Modern lamp",
		},
		{
			Width: 1, Height: 1,
			Weight: 0.1,
			Name:   "A key",
		},
	})
}

type Box struct {
	Width  uint32
	Height uint32
	Weight float32
	Name   string
}

func CheckBoxes(boxes []*Box) {
	C.checkBoxes((**C.struct_Box)(unsafe.Pointer(&boxes[0])), C.uint(len(boxes)))
}

HOWTO

$ go run main.go

out.txt

got a box 10x5 10.990000lb, contents: 'Cozy lamp'
got a box 6x6 5.000000lb, contents: 'Modern lamp'
got a box 1x1 0.100000lb, contents: 'A key'