node/src/handle_wrap.h at master · CombatCode/node · GitHub

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// 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 HANDLE_WRAP_H_

#define HANDLE_WRAP_H_

#include "queue.h"

namespace node {

// Rules:

// - Do not throw from handle methods. Set errno.

// - MakeCallback may only be made directly off the event loop.

// That is there can be no JavaScript stack frames underneith it.

// (Is there anyway to assert that?)

// - No use of v8::WeakReferenceCallback. The close callback signifies that

// we're done with a handle - external resources can be freed.

// - Reusable?

// - The uv_close_cb is used to free the c++ object. The close callback

// is not made into javascript land.

// - uv_ref, uv_unref counts are managed at this layer to avoid needless

// js/c++ boundary crossing. At the javascript layer that should all be

// taken care of.

#define UNWRAP_NO_ABORT(type) \

assert(!args.This().IsEmpty()); \

assert(args.This()->InternalFieldCount() > 0); \

type* wrap = static_cast<type*>( \

args.This()->GetAlignedPointerFromInternalField(0));

class HandleWrap {

public:

static void Initialize(v8::Handle<v8::Object> target);

static void Close(const v8::FunctionCallbackInfo<v8::Value>& args);

static void Ref(const v8::FunctionCallbackInfo<v8::Value>& args);

static void Unref(const v8::FunctionCallbackInfo<v8::Value>& args);

inline uv_handle_t* GetHandle() { return handle__; };

protected:

HandleWrap(v8::Handle<v8::Object> object, uv_handle_t* handle);

virtual ~HandleWrap();

inline v8::Local<v8::Object> object() {

return v8::Local<v8::Object>::New(node_isolate, persistent());

}

inline v8::Persistent<v8::Object>& persistent() {

return object_;

}

private:

friend void GetActiveHandles(const v8::FunctionCallbackInfo<v8::Value>&);

static void OnClose(uv_handle_t* handle);

v8::Persistent<v8::Object> object_;

QUEUE handle_wrap_queue_;

// Using double underscore due to handle_ member in tcp_wrap. Probably

// tcp_wrap should rename it's member to 'handle'.

uv_handle_t* handle__;

unsigned int flags_;

static const unsigned int kUnref = 1;

static const unsigned int kCloseCallback = 2;

};

} // namespace node

#endif // HANDLE_WRAP_H_

node/src/handle_wrap.h at master · CombatCode/node · GitHub

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