in my go file:
package main
import "C"
// AddListener ...
//export AddListener
type AddListener interface {
addResult(i int)
}
func main() {
}
// Add ...
//export Add
func Add(i, j int) int {
return i + j
}
// Add2 ...
//export Add2
func Add2(i, j int, listener AddListener) {
listener.addResult(i + j)
}
and build:
go build -o ../test/iamfan -buildmode=c-shared ./main.go
two files are generated. iamfan and iamfan.h
/* Code generated by cmd/cgo; DO NOT EDIT. */
/* package command-line-arguments */
#line 1 "cgo-builtin-export-prolog"
#include <stddef.h> /* for ptrdiff_t below */
#ifndef GO_CGO_EXPORT_PROLOGUE_H
#define GO_CGO_EXPORT_PROLOGUE_H
#ifndef GO_CGO_GOSTRING_TYPEDEF
typedef struct { const char *p; ptrdiff_t n; } _GoString_;
#endif
#endif
/* Start of preamble from import "C" comments. */
/* End of preamble from import "C" comments. */
/* Start of boilerplate cgo prologue. */
#line 1 "cgo-gcc-export-header-prolog"
#ifndef GO_CGO_PROLOGUE_H
#define GO_CGO_PROLOGUE_H
typedef signed char GoInt8;
typedef unsigned char GoUint8;
typedef short GoInt16;
typedef unsigned short GoUint16;
typedef int GoInt32;
typedef unsigned int GoUint32;
typedef long long GoInt64;
typedef unsigned long long GoUint64;
typedef GoInt64 GoInt;
typedef GoUint64 GoUint;
typedef __SIZE_TYPE__ GoUintptr;
typedef float GoFloat32;
typedef double GoFloat64;
typedef float _Complex GoComplex64;
typedef double _Complex GoComplex128;
/*
static assertion to make sure the file is being used on architecture
at least with matching size of GoInt.
*/
typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ?
1:-1];
#ifndef GO_CGO_GOSTRING_TYPEDEF
typedef _GoString_ GoString;
#endif
typedef void *GoMap;
typedef void *GoChan;
typedef struct { void *t; void *v; } GoInterface;
typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
#endif
/* End of boilerplate cgo prologue. */
#ifdef __cplusplus
extern "C" {
#endif
// Add ...
extern GoInt Add(GoInt p0, GoInt p1);
// Add2 ...
extern void Add2(GoInt p0, GoInt p1, GoInterface p2);
#ifdef __cplusplus
}
#endif
in my c file:
#include <stdio.h>
#include "iamfan.h"
void result(int i)
{
printf("result from go: %i\n", i);
}
int main()
{
GoInt addResult;
addResult = Add(5, 8);
printf("add result: %lli\n", addResult);
GoInterface face;
// ???
// please help me.
Add2(2, 6, face);
return 0;
}
How to use add2 function, i am very troubled.
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