text: // 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.
  
  #include "node.h"
  #include "node_buffer.h"
  #include "req_wrap.h"
  #include "handle_wrap.h"
  #include "stream_wrap.h"
  #include "pipe_wrap.h"
  
  #define UNWRAP \
    assert(!args.Holder().IsEmpty()); \
    assert(args.Holder()->InternalFieldCount() > 0); \
    PipeWrap* wrap =  \
        static_cast<PipeWrap*>(args.Holder()->GetPointerFromInternalField(0)); \
    if (!wrap) { \
      uv_err_t err; \
      err.code = UV_EBADF; \
      SetErrno(err); \
      return scope.Close(Integer::New(-1)); \
    }
  
  namespace node {
  
  using v8::Object;
  using v8::Handle;
  using v8::Local;
  using v8::Persistent;
  using v8::Value;
  using v8::HandleScope;
  using v8::FunctionTemplate;
  using v8::String;
  using v8::Function;
  using v8::TryCatch;
  using v8::Context;
  using v8::Arguments;
  using v8::Integer;
  using v8::Boolean;
  
  Persistent<Function> pipeConstructor;
  
  
  // TODO share with TCPWrap?
  typedef class ReqWrap<uv_connect_t> ConnectWrap;
  
  
  uv_pipe_t* PipeWrap::UVHandle() {
    return &handle_;
  }
  
  
  Local<Object> PipeWrap::Instantiate() {
    HandleScope scope;
    assert(!pipeConstructor.IsEmpty());
    return scope.Close(pipeConstructor->NewInstance());
  }
  
  
  PipeWrap* PipeWrap::Unwrap(Local<Object> obj) {
    assert(!obj.IsEmpty());
    assert(obj->InternalFieldCount() > 0);
    return static_cast<PipeWrap*>(obj->GetPointerFromInternalField(0));
  }
  
  
  void PipeWrap::Initialize(Handle<Object> target) {
    StreamWrap::Initialize(target);
  
    HandleScope scope;
  
    Local<FunctionTemplate> t = FunctionTemplate::New(New);
    t->SetClassName(String::NewSymbol("Pipe"));
  
    t->InstanceTemplate()->SetInternalFieldCount(1);
  
    NODE_SET_PROTOTYPE_METHOD(t, "close", HandleWrap::Close);
    NODE_SET_PROTOTYPE_METHOD(t, "unref", HandleWrap::Unref);
    NODE_SET_PROTOTYPE_METHOD(t, "ref", HandleWrap::Ref);
  
    NODE_SET_PROTOTYPE_METHOD(t, "readStart", StreamWrap::ReadStart);
    NODE_SET_PROTOTYPE_METHOD(t, "readStop", StreamWrap::ReadStop);
    NODE_SET_PROTOTYPE_METHOD(t, "write", StreamWrap::Write);
    NODE_SET_PROTOTYPE_METHOD(t, "shutdown", StreamWrap::Shutdown);
  
    NODE_SET_PROTOTYPE_METHOD(t, "bind", Bind);
    NODE_SET_PROTOTYPE_METHOD(t, "listen", Listen);
    NODE_SET_PROTOTYPE_METHOD(t, "connect", Connect);
    NODE_SET_PROTOTYPE_METHOD(t, "open", Open);
  
  #ifdef _WIN32
    NODE_SET_PROTOTYPE_METHOD(t, "setPendingInstances", SetPendingInstances);
  #endif
  
    pipeConstructor = Persistent<Function>::New(t->GetFunction());
  
    target->Set(String::NewSymbol("Pipe"), pipeConstructor);
  }
  
  
  Handle<Value> PipeWrap::New(const Arguments& args) {
    // This constructor should not be exposed to public javascript.
    // Therefore we assert that we are not trying to call this as a
    // normal function.
    assert(args.IsConstructCall());
  
    HandleScope scope;
    PipeWrap* wrap = new PipeWrap(args.This(), args[0]->IsTrue());
    assert(wrap);
  
    return scope.Close(args.This());
  }
  
  
  PipeWrap::PipeWrap(Handle<Object> object, bool ipc)
      : StreamWrap(object, (uv_stream_t*) &handle_) {
    int r = uv_pipe_init(uv_default_loop(), &handle_, ipc);
    assert(r == 0); // How do we proxy this error up to javascript?
                    // Suggestion: uv_pipe_init() returns void.
    handle_.data = reinterpret_cast<void*>(this);
    UpdateWriteQueueSize();
  }
  
  
  Handle<Value> PipeWrap::Bind(const Arguments& args) {
    HandleScope scope;
  
    UNWRAP
  
    String::AsciiValue name(args[0]->ToString());
  
    int r = uv_pipe_bind(&wrap->handle_, *name);
  
    // Error starting the pipe.
    if (r) SetErrno(uv_last_error(uv_default_loop()));
  
    return scope.Close(Integer::New(r));
  }
  
  
  #ifdef _WIN32
  Handle<Value> PipeWrap::SetPendingInstances(const Arguments& args) {
    HandleScope scope;
  
    UNWRAP
  
    int instances = args[0]->Int32Value();
  
    uv_pipe_pending_instances(&wrap->handle_, instances);
  
    return v8::Null();
  }
  #endif
  
  
  Handle<Value> PipeWrap::Listen(const Arguments& args) {
    HandleScope scope;
  
    UNWRAP
  
    int backlog = args[0]->Int32Value();
  
    int r = uv_listen((uv_stream_t*)&wrap->handle_, backlog, OnConnection);
  
    // Error starting the pipe.
    if (r) SetErrno(uv_last_error(uv_default_loop()));
  
    return scope.Close(Integer::New(r));
  }
  
  
  // TODO maybe share with TCPWrap?
  void PipeWrap::OnConnection(uv_stream_t* handle, int status) {
    HandleScope scope;
  
    PipeWrap* wrap = static_cast<PipeWrap*>(handle->data);
    assert(&wrap->handle_ == (uv_pipe_t*)handle);
  
    // We should not be getting this callback if someone as already called
    // uv_close() on the handle.
    assert(wrap->object_.IsEmpty() == false);
  
    if (status != 0) {
      // TODO Handle server error (set errno and call onconnection with NULL)
      assert(0);
      return;
    }
  
    // Instanciate the client javascript object and handle.
    Local<Object> client_obj = pipeConstructor->NewInstance();
  
    // Unwrap the client javascript object.
    assert(client_obj->InternalFieldCount() > 0);
    PipeWrap* client_wrap =
        static_cast<PipeWrap*>(client_obj->GetPointerFromInternalField(0));
  
    if (uv_accept(handle, (uv_stream_t*)&client_wrap->handle_)) return;
  
    // Successful accept. Call the onconnection callback in JavaScript land.
    Local<Value> argv[1] = { client_obj };
    MakeCallback(wrap->object_, "onconnection", 1, argv);
  }
  
  // TODO Maybe share this with TCPWrap?
  void PipeWrap::AfterConnect(uv_connect_t* req, int status) {
    ConnectWrap* req_wrap = (ConnectWrap*) req->data;
    PipeWrap* wrap = (PipeWrap*) req->handle->data;
  
    HandleScope scope;
  
    // The wrap and request objects should still be there.
    assert(req_wrap->object_.IsEmpty() == false);
    assert(wrap->object_.IsEmpty() == false);
  
    bool readable, writable;
  
    if (status) {
      SetErrno(uv_last_error(uv_default_loop()));
      readable = writable = 0;
    } else {
      readable = uv_is_readable(req->handle) != 0;
      writable = uv_is_writable(req->handle) != 0;
    }
  
    Local<Value> argv[5] = {
      Integer::New(status),
      Local<Value>::New(wrap->object_),
      Local<Value>::New(req_wrap->object_),
      Local<Value>::New(Boolean::New(readable)),
      Local<Value>::New(Boolean::New(writable))
    };
  
    MakeCallback(req_wrap->object_, "oncomplete", 5, argv);
  
    delete req_wrap;
  }
  
  
  Handle<Value> PipeWrap::Open(const Arguments& args) {
    HandleScope scope;
  
    UNWRAP
  
    int fd = args[0]->IntegerValue();
  
    uv_pipe_open(&wrap->handle_, fd);
  
    return scope.Close(v8::Null());
  }
  
  
  Handle<Value> PipeWrap::Connect(const Arguments& args) {
    HandleScope scope;
  
    UNWRAP
  
    String::AsciiValue name(args[0]->ToString());
  
    ConnectWrap* req_wrap = new ConnectWrap();
  
    uv_pipe_connect(&req_wrap->req_,
                    &wrap->handle_,
                    *name,
                    AfterConnect);
  
    req_wrap->Dispatched();
  
    return scope.Close(req_wrap->object_);
  }
  
  
  }  // namespace node
  
  NODE_MODULE(node_pipe_wrap, node::PipeWrap::Initialize)
  