node/src/stream_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 STREAM_WRAP_H_

#define STREAM_WRAP_H_

#include "v8.h"

#include "node.h"

#include "handle_wrap.h"

#include "req_wrap.h"

#include "string_bytes.h"

namespace node {

// Forward declaration

class StreamWrap;

typedef class ReqWrap<uv_shutdown_t> ShutdownWrap;

class WriteWrap: public ReqWrap<uv_write_t> {

public:

explicit WriteWrap(StreamWrap* wrap) {

wrap_ = wrap;

}

void* operator new(size_t size, char* storage) { return storage; }

// This is just to keep the compiler happy. It should never be called, since

// we don't use exceptions in node.

void operator delete(void* ptr, char* storage) { assert(0); }

StreamWrap* wrap_;

protected:

// People should not be using the non-placement new and delete operator on a

// WriteWrap. Ensure this never happens.

void* operator new(size_t size) { assert(0); };

void operator delete(void* ptr) { assert(0); };

};

// Overridable callbacks' types

class StreamWrapCallbacks {

public:

explicit StreamWrapCallbacks(StreamWrap* wrap) : wrap_(wrap) {

}

explicit StreamWrapCallbacks(StreamWrapCallbacks* old) : wrap_(old->wrap_) {

}

virtual ~StreamWrapCallbacks() {

}

virtual int DoWrite(WriteWrap* w,

uv_buf_t* bufs,

size_t count,

uv_stream_t* send_handle,

uv_write_cb cb);

virtual void AfterWrite(WriteWrap* w);

virtual uv_buf_t DoAlloc(uv_handle_t* handle, size_t suggested_size);

virtual void DoRead(uv_stream_t* handle,

ssize_t nread,

uv_buf_t buf,

uv_handle_type pending);

virtual int DoShutdown(ShutdownWrap* req_wrap, uv_shutdown_cb cb);

v8::Handle<v8::Object> Self();

protected:

StreamWrap* wrap_;

};

class StreamWrap : public HandleWrap {

public:

uv_stream_t* GetStream() { return stream_; }

void OverrideCallbacks(StreamWrapCallbacks* callbacks) {

StreamWrapCallbacks* old = callbacks_;

callbacks_ = callbacks;

if (old != &default_callbacks_)

delete old;

}

StreamWrapCallbacks* GetCallbacks() {

return callbacks_;

}

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

static void GetFD(v8::Local<v8::String>,

const v8::PropertyCallbackInfo<v8::Value>&);

// JavaScript functions

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

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

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

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

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

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

static void WriteUtf8String(const v8::FunctionCallbackInfo<v8::Value>& args);

static void WriteUcs2String(const v8::FunctionCallbackInfo<v8::Value>& args);

// Overridable callbacks

StreamWrapCallbacks* callbacks_;

protected:

static size_t WriteBuffer(v8::Handle<v8::Value> val, uv_buf_t* buf);

StreamWrap(v8::Handle<v8::Object> object, uv_stream_t* stream);

~StreamWrap() {

if (callbacks_ != &default_callbacks_) {

delete callbacks_;

callbacks_ = NULL;

}

void StateChange() { }

void UpdateWriteQueueSize();

private:

// Callbacks for libuv

static void AfterWrite(uv_write_t* req, int status);

static uv_buf_t OnAlloc(uv_handle_t* handle, size_t suggested_size);

static void AfterShutdown(uv_shutdown_t* req, int status);

static void OnRead(uv_stream_t* handle, ssize_t nread, uv_buf_t buf);

static void OnRead2(uv_pipe_t* handle, ssize_t nread, uv_buf_t buf,

uv_handle_type pending);

static void OnReadCommon(uv_stream_t* handle, ssize_t nread,

uv_buf_t buf, uv_handle_type pending);

template <enum encoding encoding>

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

uv_stream_t* stream_;

StreamWrapCallbacks default_callbacks_;

friend class StreamWrapCallbacks;

};

} // namespace node

#endif // STREAM_WRAP_H_

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

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