async-wrap-inl.h

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef SRC_ASYNC_WRAP_INL_H_
#define SRC_ASYNC_WRAP_INL_H_

#include "async-wrap.h"
#include "base-object.h"
#include "base-object-inl.h"
#include "env.h"
#include "env-inl.h"
#include "node_internals.h"
#include "util.h"
#include "util-inl.h"

#include "v8.h"

namespace node {

inline AsyncWrap::AsyncWrap(Environment* env,
                            v8::Handle<v8::Object> object,
                            ProviderType provider,
                            AsyncWrap* parent)
    : BaseObject(env, object),
      has_async_queue_(false),
      provider_type_(provider) {
  // Check user controlled flag to see if the init callback should run.
  if (!env->using_asyncwrap())
    return;
  if (!env->call_async_init_hook() && parent == NULL)
    return;

  // TODO(trevnorris): Until it's verified all passed object's are not weak,
  // add a HandleScope to make sure there's no leak.
  v8::HandleScope scope(env->isolate());

  v8::Local<v8::Object> parent_obj;

  v8::TryCatch try_catch;

  // If a parent value was sent then call its pre/post functions to let it know
  // a conceptual "child" is being instantiated (e.g. that a server has
  // received a connection).
  if (parent != NULL) {
    parent_obj = parent->object();
    env->async_hooks_pre_function()->Call(parent_obj, 0, NULL);
    if (try_catch.HasCaught())
      FatalError("node::AsyncWrap::AsyncWrap", "parent pre hook threw");
  }

  env->async_hooks_init_function()->Call(object, 0, NULL);

  if (try_catch.HasCaught())
    FatalError("node::AsyncWrap::AsyncWrap", "init hook threw");

  has_async_queue_ = true;

  if (parent != NULL) {
    env->async_hooks_post_function()->Call(parent_obj, 0, NULL);
    if (try_catch.HasCaught())
      FatalError("node::AsyncWrap::AsyncWrap", "parent post hook threw");
  }
}


inline AsyncWrap::~AsyncWrap() {
}


inline uint32_t AsyncWrap::provider_type() const {
  return provider_type_;
}


inline v8::Handle<v8::Value> AsyncWrap::MakeCallback(
    const v8::Handle<v8::String> symbol,
    int argc,
    v8::Handle<v8::Value>* argv) {
  v8::Local<v8::Value> cb_v = object()->Get(symbol);
  ASSERT(cb_v->IsFunction());
  return MakeCallback(cb_v.As<v8::Function>(), argc, argv);
}


inline v8::Handle<v8::Value> AsyncWrap::MakeCallback(
    uint32_t index,
    int argc,
    v8::Handle<v8::Value>* argv) {
  v8::Local<v8::Value> cb_v = object()->Get(index);
  ASSERT(cb_v->IsFunction());
  return MakeCallback(cb_v.As<v8::Function>(), argc, argv);
}

}  // namespace node

#endif  // SRC_ASYNC_WRAP_INL_H_