Golang 生成dll动态库并调用

package main
 
import "C"
import (
	"fmt"
)
 
//export DCall
func DCall() int {
	return 2
}
 
//export DCallWithParam
func DCallWithParam(msg *C.char) *C.char {
	return msg
}
 
func main() {
	fmt.Println("goroute全部退出")
}

go build -buildmode=c-shared -o plugin.dll plugin.go

/* 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
 
 
extern GoInt DCall();
 
extern char* DCallWithParam(char* p0);
 
#ifdef __cplusplus
}
#endif

package main
 
import "C"
import (
	"fmt"
	"syscall"
	"unsafe"
)
 
func main() {
	dll := syscall.NewLazyDLL("plugin.dll")
	f := dll.NewProc("DCall")
	res, _, _ := f.Call()
	fmt.Println(res)
 
	f2 := dll.NewProc("DCallWithParam")
	r, _, _ := f2.Call(uintptr(unsafe.Pointer(syscall.StringBytePtr("php2.cc"))))
	// 获取C返回的指针。
	// 注意C返回的r为char*，对应的Go类型为*byte
	p := (*byte)(unsafe.Pointer(r))
	// 定义一个[]byte切片，用来存储C返回的字符串
	data := make([]byte, 0)
	// 遍历C返回的char指针，直到 '\0' 为止
	for *p != 0 {
		data = append(data, *p)  // 将得到的byte追加到末尾
		r += unsafe.Sizeof(byte(0))  // 移动指针，指向下一个char
		p = (*byte)(unsafe.Pointer(r))  // 获取指针的值，此时指针已经指向下一个char
	}
	name := string(data)  // 将data转换为字符串
 
	fmt.Printf("Hello, %s!\n", name)
}

go run pluginLoad.go