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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_
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