node module for uv_unref

http_server.js

var unref = require('./build/Release/unref.node').unref;
var http = require('http');
http.createServer(function(req,res){
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Loop Counter='+unref()+'\n');
}).listen(8080);

unref.cc

#define BUILDING_NODE_EXTENSION
#include <node.h>
#include <uv.h>

using namespace v8;

Handle<Value> Unref(const Arguments& args) {
  HandleScope scope;
  uv_unref(uv_default_loop());
  Local<Number> num = Number::New(uv_loop_refcount(uv_default_loop()));
  return scope.Close(num);
}

void Init(Handle<Object> target) {
  target->Set(String::NewSymbol("unref"),
              FunctionTemplate::New(Unref)->GetFunction());
}

NODE_MODULE(unref, Init)

wscript

srcdir = '.'
blddir = 'build'
VERSION = '0.0.1'

def set_options(opt):
  opt.tool_options('compiler_cxx')

def configure(conf):
  conf.check_tool('compiler_cxx')
  conf.check_tool('node_addon')

def build(bld):
  obj = bld.new_task_gen('cxx', 'shlib', 'node_addon')
  obj.target = 'unref'
  obj.source = ['unref.cc']

作成＆実行方法

unix:~/tmp/addon> node-waf configure build
Checking for program g++ or c++          : /usr/bin/g++
Checking for program cpp                 : /usr/bin/cpp
Checking for program ar                  : /usr/bin/ar
Checking for program ranlib              : /usr/bin/ranlib
Checking for g++                         : ok
Checking for node path                   : not found
Checking for node prefix                 : ok /usr/local
'configure' finished successfully (0.025s)
Waf: Entering directory `/home/ohtsu/tmp/addon/build'
Waf: Leaving directory `/home/ohtsu/tmp/addon/build'
'build' finished successfully (0.005s)
unix:~/tmp/addon> node http_server.js

ブラウザーを使って port 8080 へアクセス。
リロードを続けて画面に出力されるイベントループのカウンター値が０になると自動的に node が終了します。