这就是我所有的问题,真的,但我认为这是一件有趣的事情。
发布于 2016-09-01 12:16:41
随着在go中添加对共享库的支持,这一点现在成为可能。
calculator.go
// package name: calculator
package main
import "C"
//export Sum
func Sum(x, y float64) float64 {
return x + y
}
func main() {
}
node-calculator.cc
#include "calculator.h"
#include <node.h>
namespace calc {
using v8::FunctionCallbackInfo;
using v8::Isolate;
using v8::Local;
using v8::Object;
using v8::String;
using v8::Value;
using v8::Number;
using v8::Exception;
void add(const FunctionCallbackInfo<Value>& args) {
Isolate* isolate = args.GetIsolate();
// Check the number of arguments passed.
if (args.Length() < 2) {
// Throw an Error that is passed back to JavaScript
isolate->ThrowException(Exception::TypeError(
String::NewFromUtf8(isolate, "Wrong number of arguments")));
return;
}
// Check the argument types
if (!args[0]->IsNumber() || !args[1]->IsNumber()) {
isolate->ThrowException(Exception::TypeError(
String::NewFromUtf8(isolate, "Wrong arguments")));
return;
}
// Perform the operation
Local<Number> num = Number::New(isolate, Sum(args[0]->NumberValue(), args[1]->NumberValue()));
// Set the return value (using the passed in
// FunctionCallbackInfo<Value>&)
args.GetReturnValue().Set(num);
}
void init(Local<Object> exports) {
NODE_SET_METHOD(exports, "add", add);
}
NODE_MODULE(calculator, init)
}
binding.gyp
{
"targets": [
{
"target_name": "node-calculator",
"sources": [
"node-calculator.cc"
],
"libraries": [
"../calculator.a"
],
},
],
}
test.js
const calculator = require('./build/Release/node-calculator');
console.log('4+5=', calculator.add(4, 5));
内部版本:
go build -buildmode c-archive -o calculator.a calculator.go
node-gyp configure
node-gyp build
输出:
#> node test.js
4+5= 9
https://stackoverflow.com/questions/20728255
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