test/cgotest/cgomixmode/x/tx.go

package x

/*
#include "tx.h"
void cb(); // C99定义，通过 C. 使用，不能有参数和返回值
*/
import "C"

import (
	"log"
	"os"
	"unsafe"

	"github.com/spf13/cast"
)

// go 实现导出C99，在 .c 中使用
//export cb
func cb() {
	log.Println("run callback")
}

//export goputs
func goputs(s string) int {
	log.Println("go:", s)
	return 0
}

func init() {
	log.SetOutput(os.Stdout)
	log.SetFlags(log.Ldate | log.Ltime | log.Lmicroseconds)
}

func run() {
	log.Println("run begin")
	log.Println("getNumber", cast.ToString(int(C.getNumber())))
	log.Println("getString", cast.ToString(C.GoString(C.getString())))
	C.callback((C.f_ptr)(unsafe.Pointer(C.cb)))
	log.Println("run end")
}

func Run() {
	run()
}