Golang CGO Example

README.md

Golang CGO Example

A simple example of using CGO in Golang.

Requirements

• Go
• GCC

Windows

• Install mingw-w64:
  • https://sourceforge.net/projects/mingw-w64/
  • https://mingw-w64.org/doku.php
• Add to PATH env:

C:\Program Files\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin
C:\Program Files\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\libexec\gcc\x86_64-w64-mingw32\6.3.0

Resources

• https://golang.org/cmd/cgo/
• https://github.com/golang/go/wiki/cgo

License

MIT

main.go

package main

/*
#include <stdlib.h>
#include <time.h>
*/
import "C"

import (
	"fmt"
)

func main() {

	// Seed rand generator.
	seed(int(C.time(nil)))

	// Output 10 random numbers from 0-100.
	for i := 1; i <= 10; i++ {
		rand := random()
		fmt.Println(rand)
	}
}

func random() int {
	return int(C.rand()) % 100
}

func seed(i int) {
	C.srand(C.uint(i))
}