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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	stream_pipe.cc	Lines:	136	186	73.1 %
Date:	2022-05-23 04:15:47	Branches:	51	108	47.2 %


#include "stream_pipe.h"
#include "stream_base-inl.h"
#include "node_buffer.h"
#include "util-inl.h"

namespace node {

using v8::BackingStore;
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Local;
using v8::Object;
using v8::Value;

StreamPipe::StreamPipe(StreamBase* source,
                       StreamBase* sink,
                       Local<Object> obj)
    : AsyncWrap(source->stream_env(), obj, AsyncWrap::PROVIDER_STREAMPIPE) {
  MakeWeak();

  CHECK_NOT_NULL(sink);
  CHECK_NOT_NULL(source);

  source->PushStreamListener(&readable_listener_);
  sink->PushStreamListener(&writable_listener_);

  uses_wants_write_ = sink->HasWantsWrite();

  // Set up links between this object and the source/sink objects.
  // In particular, this makes sure that they are garbage collected as a group,
  // if that applies to the given streams (for example, Http2Streams use
  // weak references).
  if (obj->Set(env()->context(),
               env()->source_string(),
               source->GetObject()).IsNothing()) {
    return;
  }
  if (source->GetObject()->Set(env()->context(),
                               env()->pipe_target_string(),
                               obj).IsNothing()) {
      return;
  }
  if (obj->Set(env()->context(),
               env()->sink_string(),
               sink->GetObject()).IsNothing()) {
    return;
  }
  if (sink->GetObject()->Set(env()->context(),
                             env()->pipe_source_string(),
                             obj).IsNothing()) {
    return;
  }
}

StreamPipe::~StreamPipe() {
  Unpipe(true);
}

StreamBase* StreamPipe::source() {
  return static_cast<StreamBase*>(readable_listener_.stream());
}

StreamBase* StreamPipe::sink() {
  return static_cast<StreamBase*>(writable_listener_.stream());
}

void StreamPipe::Unpipe(bool is_in_deletion) {
  if (is_closed_)
    return;

  // Note that we possibly cannot use virtual methods on `source` and `sink`
  // here, because this function can be called from their destructors via
  // `OnStreamDestroy()`.
  if (!source_destroyed_)
    source()->ReadStop();

  is_closed_ = true;
  is_reading_ = false;
  source()->RemoveStreamListener(&readable_listener_);
  if (pending_writes_ == 0)
    sink()->RemoveStreamListener(&writable_listener_);

  if (is_in_deletion) return;

  // Delay the JS-facing part with SetImmediate, because this might be from
  // inside the garbage collector, so we can’t run JS here.
  HandleScope handle_scope(env()->isolate());
  BaseObjectPtr<StreamPipe> strong_ref{this};
  env()->SetImmediate([this, strong_ref](Environment* env) {
    HandleScope handle_scope(env->isolate());
    Context::Scope context_scope(env->context());
    Local<Object> object = this->object();

    Local<Value> onunpipe;
    if (!object->Get(env->context(), env->onunpipe_string()).ToLocal(&onunpipe))
      return;
    if (onunpipe->IsFunction() &&
        MakeCallback(onunpipe.As<Function>(), 0, nullptr).IsEmpty()) {
      return;
    }

    // Set all the links established in the constructor to `null`.
    Local<Value> null = Null(env->isolate());

    Local<Value> source_v;
    Local<Value> sink_v;
    if (!object->Get(env->context(), env->source_string()).ToLocal(&source_v) ||
        !object->Get(env->context(), env->sink_string()).ToLocal(&sink_v) ||
        !source_v->IsObject() || !sink_v->IsObject()) {
      return;
    }

    if (object->Set(env->context(), env->source_string(), null).IsNothing() ||
        object->Set(env->context(), env->sink_string(), null).IsNothing() ||
        source_v.As<Object>()
            ->Set(env->context(), env->pipe_target_string(), null)
            .IsNothing() ||
        sink_v.As<Object>()
            ->Set(env->context(), env->pipe_source_string(), null)
            .IsNothing()) {
      return;
    }
  });
}

uv_buf_t StreamPipe::ReadableListener::OnStreamAlloc(size_t suggested_size) {
  StreamPipe* pipe = ContainerOf(&StreamPipe::readable_listener_, this);
  size_t size = std::min(suggested_size, pipe->wanted_data_);
  CHECK_GT(size, 0);
  return pipe->env()->allocate_managed_buffer(size);
}

void StreamPipe::ReadableListener::OnStreamRead(ssize_t nread,
                                                const uv_buf_t& buf_) {
  StreamPipe* pipe = ContainerOf(&StreamPipe::readable_listener_, this);
  std::unique_ptr<BackingStore> bs = pipe->env()->release_managed_buffer(buf_);
  if (nread < 0) {
    // EOF or error; stop reading and pass the error to the previous listener
    // (which might end up in JS).
    pipe->is_eof_ = true;
    // Cache `sink()` here because the previous listener might do things
    // that eventually lead to an `Unpipe()` call.
    StreamBase* sink = pipe->sink();
    stream()->ReadStop();
    CHECK_NOT_NULL(previous_listener_);
    previous_listener_->OnStreamRead(nread, uv_buf_init(nullptr, 0));
    // If we’re not writing, close now. Otherwise, we’ll do that in
    // `OnStreamAfterWrite()`.
    if (pipe->pending_writes_ == 0) {
      sink->Shutdown();
      pipe->Unpipe();
    }
    return;
  }

  pipe->ProcessData(nread, std::move(bs));
}

void StreamPipe::ProcessData(size_t nread,
                             std::unique_ptr<BackingStore> bs) {
  CHECK(uses_wants_write_ || pending_writes_ == 0);
  uv_buf_t buffer = uv_buf_init(static_cast<char*>(bs->Data()), nread);
  StreamWriteResult res = sink()->Write(&buffer, 1);
  pending_writes_++;
  if (!res.async) {
    writable_listener_.OnStreamAfterWrite(nullptr, res.err);
  } else {
    is_reading_ = false;
    res.wrap->SetBackingStore(std::move(bs));
    if (source() != nullptr)
      source()->ReadStop();
  }
}

void StreamPipe::WritableListener::OnStreamAfterWrite(WriteWrap* w,
                                                      int status) {
  StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
  pipe->pending_writes_--;
  if (pipe->is_closed_) {
    if (pipe->pending_writes_ == 0) {
      Environment* env = pipe->env();
      HandleScope handle_scope(env->isolate());
      Context::Scope context_scope(env->context());
      if (pipe->MakeCallback(env->oncomplete_string(), 0, nullptr).IsEmpty())
        return;
      stream()->RemoveStreamListener(this);
    }
    return;
  }

  if (pipe->is_eof_) {
    HandleScope handle_scope(pipe->env()->isolate());
    InternalCallbackScope callback_scope(pipe,
        InternalCallbackScope::kSkipTaskQueues);
    pipe->sink()->Shutdown();
    pipe->Unpipe();
    return;
  }

  if (status != 0) {
    CHECK_NOT_NULL(previous_listener_);
    StreamListener* prev = previous_listener_;
    pipe->Unpipe();
    prev->OnStreamAfterWrite(w, status);
    return;
  }

  if (!pipe->uses_wants_write_) {
    OnStreamWantsWrite(65536);
  }
}

void StreamPipe::WritableListener::OnStreamAfterShutdown(ShutdownWrap* w,
                                                         int status) {
  StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
  CHECK_NOT_NULL(previous_listener_);
  StreamListener* prev = previous_listener_;
  pipe->Unpipe();
  prev->OnStreamAfterShutdown(w, status);
}

void StreamPipe::ReadableListener::OnStreamDestroy() {
  StreamPipe* pipe = ContainerOf(&StreamPipe::readable_listener_, this);
  pipe->source_destroyed_ = true;
  if (!pipe->is_eof_) {
    OnStreamRead(UV_EPIPE, uv_buf_init(nullptr, 0));
  }
}

void StreamPipe::WritableListener::OnStreamDestroy() {
  StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
  pipe->sink_destroyed_ = true;
  pipe->is_eof_ = true;
  pipe->pending_writes_ = 0;
  pipe->Unpipe();
}

void StreamPipe::WritableListener::OnStreamWantsWrite(size_t suggested_size) {
  StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
  pipe->wanted_data_ = suggested_size;
  if (pipe->is_reading_ || pipe->is_closed_)
    return;
  HandleScope handle_scope(pipe->env()->isolate());
  InternalCallbackScope callback_scope(pipe,
      InternalCallbackScope::kSkipTaskQueues);
  pipe->is_reading_ = true;
  pipe->source()->ReadStart();
}

uv_buf_t StreamPipe::WritableListener::OnStreamAlloc(size_t suggested_size) {
  CHECK_NOT_NULL(previous_listener_);
  return previous_listener_->OnStreamAlloc(suggested_size);
}

void StreamPipe::WritableListener::OnStreamRead(ssize_t nread,
                                                const uv_buf_t& buf) {
  CHECK_NOT_NULL(previous_listener_);
  return previous_listener_->OnStreamRead(nread, buf);
}

void StreamPipe::New(const FunctionCallbackInfo<Value>& args) {
  CHECK(args.IsConstructCall());
  CHECK(args[0]->IsObject());
  CHECK(args[1]->IsObject());
  StreamBase* source = StreamBase::FromObject(args[0].As<Object>());
  StreamBase* sink = StreamBase::FromObject(args[1].As<Object>());

  new StreamPipe(source, sink, args.This());
}

void StreamPipe::Start(const FunctionCallbackInfo<Value>& args) {
  StreamPipe* pipe;
  ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
  pipe->is_closed_ = false;
  pipe->writable_listener_.OnStreamWantsWrite(65536);
}

void StreamPipe::Unpipe(const FunctionCallbackInfo<Value>& args) {
  StreamPipe* pipe;
  ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
  pipe->Unpipe();
}

void StreamPipe::IsClosed(const FunctionCallbackInfo<Value>& args) {
  StreamPipe* pipe;
  ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
  args.GetReturnValue().Set(pipe->is_closed_);
}

void StreamPipe::PendingWrites(const FunctionCallbackInfo<Value>& args) {
  StreamPipe* pipe;
  ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
  args.GetReturnValue().Set(pipe->pending_writes_);
}

namespace {

void InitializeStreamPipe(Local<Object> target,
                          Local<Value> unused,
                          Local<Context> context,
                          void* priv) {
  Environment* env = Environment::GetCurrent(context);

  // Create FunctionTemplate for FileHandle::CloseReq
  Local<FunctionTemplate> pipe = env->NewFunctionTemplate(StreamPipe::New);
  env->SetProtoMethod(pipe, "unpipe", StreamPipe::Unpipe);
  env->SetProtoMethod(pipe, "start", StreamPipe::Start);
  env->SetProtoMethod(pipe, "isClosed", StreamPipe::IsClosed);
  env->SetProtoMethod(pipe, "pendingWrites", StreamPipe::PendingWrites);
  pipe->Inherit(AsyncWrap::GetConstructorTemplate(env));
  pipe->InstanceTemplate()->SetInternalFieldCount(
      StreamPipe::kInternalFieldCount);
  env->SetConstructorFunction(target, "StreamPipe", pipe);
}

}  // anonymous namespace

}  // namespace node

NODE_MODULE_CONTEXT_AWARE_INTERNAL(stream_pipe,
                                   node::InitializeStreamPipe)


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			#include "stream_pipe.h"
2			#include "stream_base-inl.h"
3			#include "node_buffer.h"
4			#include "util-inl.h"
5
6			namespace node {
7
8			using v8::BackingStore;
9			using v8::Context;
10			using v8::Function;
11			using v8::FunctionCallbackInfo;
12			using v8::FunctionTemplate;
13			using v8::HandleScope;
14			using v8::Local;
15			using v8::Object;
16			using v8::Value;
17
18		15	StreamPipe::StreamPipe(StreamBase* source,
19			StreamBase* sink,
20		15	Local<Object> obj)
21		15	: AsyncWrap(source->stream_env(), obj, AsyncWrap::PROVIDER_STREAMPIPE) {
22		15	MakeWeak();
23
24	✗✓	15	CHECK_NOT_NULL(sink);
25	✗✓	15	CHECK_NOT_NULL(source);
26
27		15	source->PushStreamListener(&readable_listener_);
28		15	sink->PushStreamListener(&writable_listener_);
29
30		15	uses_wants_write_ = sink->HasWantsWrite();
31
32			// Set up links between this object and the source/sink objects.
33			// In particular, this makes sure that they are garbage collected as a group,
34			// if that applies to the given streams (for example, Http2Streams use
35			// weak references).
36		30	if (obj->Set(env()->context(),
37			env()->source_string(),
38	✗✓	60	source->GetObject()).IsNothing()) {
39			return;
40			}
41		15	if (source->GetObject()->Set(env()->context(),
42			env()->pipe_target_string(),
43	✗✓	45	obj).IsNothing()) {
44			return;
45			}
46		30	if (obj->Set(env()->context(),
47			env()->sink_string(),
48	✗✓	60	sink->GetObject()).IsNothing()) {
49			return;
50			}
51		15	if (sink->GetObject()->Set(env()->context(),
52			env()->pipe_source_string(),
53	✗✓	45	obj).IsNothing()) {
54			return;
55			}
56			}
57
58		60	StreamPipe::~StreamPipe() {
59		30	Unpipe(true);
60		60	}
61
62		640	StreamBase* StreamPipe::source() {
63		640	return static_cast<StreamBase*>(readable_listener_.stream());
64			}
65
66		231	StreamBase* StreamPipe::sink() {
67		231	return static_cast<StreamBase*>(writable_listener_.stream());
68			}
69
70		29	void StreamPipe::Unpipe(bool is_in_deletion) {
71	✓✓	29	if (is_closed_)
72		15	return;
73
74			// Note that we possibly cannot use virtual methods on `source` and `sink`
75			// here, because this function can be called from their destructors via
76			// `OnStreamDestroy()`.
77	✓✗	15	if (!source_destroyed_)
78		15	source()->ReadStop();
79
80		15	is_closed_ = true;
81		15	is_reading_ = false;
82		15	source()->RemoveStreamListener(&readable_listener_);
83	✓✓	15	if (pending_writes_ == 0)
84		14	sink()->RemoveStreamListener(&writable_listener_);
85
86	✓✓	15	if (is_in_deletion) return;
87
88			// Delay the JS-facing part with SetImmediate, because this might be from
89			// inside the garbage collector, so we can’t run JS here.
90		28	HandleScope handle_scope(env()->isolate());
91		14	BaseObjectPtr<StreamPipe> strong_ref{this};
92		14	env()->SetImmediate([this, strong_ref](Environment* env) {
93		14	HandleScope handle_scope(env->isolate());
94		14	Context::Scope context_scope(env->context());
95		14	Local<Object> object = this->object();
96
97			Local<Value> onunpipe;
98	✗✓	42	if (!object->Get(env->context(), env->onunpipe_string()).ToLocal(&onunpipe))
99			return;
100	✓✗	28	if (onunpipe->IsFunction() &&
101	✗✓✗✓	56	MakeCallback(onunpipe.As<Function>(), 0, nullptr).IsEmpty()) {
102			return;
103			}
104
105			// Set all the links established in the constructor to `null`.
106		28	Local<Value> null = Null(env->isolate());
107
108			Local<Value> source_v;
109			Local<Value> sink_v;
110		28	if (!object->Get(env->context(), env->source_string()).ToLocal(&source_v) \|\|
111	✓✗	42	!object->Get(env->context(), env->sink_string()).ToLocal(&sink_v) \|\|
112	✓✗✓✗ ✗✓✗✓	42	!source_v->IsObject() \|\| !sink_v->IsObject()) {
113			return;
114			}
115
116		28	if (object->Set(env->context(), env->source_string(), null).IsNothing() \|\|
117	✓✗	42	object->Set(env->context(), env->sink_string(), null).IsNothing() \|\|
118		14	source_v.As<Object>()
119		28	->Set(env->context(), env->pipe_target_string(), null)
120	✓✗✓✗	42	.IsNothing() \|\|
121		14	sink_v.As<Object>()
122	✗✓	42	->Set(env->context(), env->pipe_source_string(), null)
123	✗✓	14	.IsNothing()) {
124			return;
125			}
126			});
127			}
128
129		207	uv_buf_t StreamPipe::ReadableListener::OnStreamAlloc(size_t suggested_size) {
130		207	StreamPipe* pipe = ContainerOf(&StreamPipe::readable_listener_, this);
131		207	size_t size = std::min(suggested_size, pipe->wanted_data_);
132	✗✓	207	CHECK_GT(size, 0);
133		207	return pipe->env()->allocate_managed_buffer(size);
134			}
135
136		212	void StreamPipe::ReadableListener::OnStreamRead(ssize_t nread,
137			const uv_buf_t& buf_) {
138		212	StreamPipe* pipe = ContainerOf(&StreamPipe::readable_listener_, this);
139		212	std::unique_ptr<BackingStore> bs = pipe->env()->release_managed_buffer(buf_);
140	✓✓	212	if (nread < 0) {
141			// EOF or error; stop reading and pass the error to the previous listener
142			// (which might end up in JS).
143		13	pipe->is_eof_ = true;
144			// Cache `sink()` here because the previous listener might do things
145			// that eventually lead to an `Unpipe()` call.
146		13	StreamBase* sink = pipe->sink();
147		13	stream()->ReadStop();
148	✗✓	13	CHECK_NOT_NULL(previous_listener_);
149		13	previous_listener_->OnStreamRead(nread, uv_buf_init(nullptr, 0));
150			// If we’re not writing, close now. Otherwise, we’ll do that in
151			// `OnStreamAfterWrite()`.
152	✓✓	13	if (pipe->pending_writes_ == 0) {
153		8	sink->Shutdown();
154		8	pipe->Unpipe();
155			}
156		13	return;
157			}
158
159		199	pipe->ProcessData(nread, std::move(bs));
160			}
161
162		199	void StreamPipe::ProcessData(size_t nread,
163			std::unique_ptr<BackingStore> bs) {
164	✗✓✗✗	199	CHECK(uses_wants_write_ \|\| pending_writes_ == 0);
165		199	uv_buf_t buffer = uv_buf_init(static_cast<char*>(bs->Data()), nread);
166		398	StreamWriteResult res = sink()->Write(&buffer, 1);
167		199	pending_writes_++;
168	✗✓	199	if (!res.async) {
169			writable_listener_.OnStreamAfterWrite(nullptr, res.err);
170			} else {
171		199	is_reading_ = false;
172		199	res.wrap->SetBackingStore(std::move(bs));
173	✓✗	199	if (source() != nullptr)
174		199	source()->ReadStop();
175			}
176		199	}
177
178		198	void StreamPipe::WritableListener::OnStreamAfterWrite(WriteWrap* w,
179			int status) {
180		198	StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
181		198	pipe->pending_writes_--;
182	✗✓	198	if (pipe->is_closed_) {
183			if (pipe->pending_writes_ == 0) {
184			Environment* env = pipe->env();
185			HandleScope handle_scope(env->isolate());
186			Context::Scope context_scope(env->context());
187			if (pipe->MakeCallback(env->oncomplete_string(), 0, nullptr).IsEmpty())
188			return;
189			stream()->RemoveStreamListener(this);
190			}
191			return;
192			}
193
194	✓✓	198	if (pipe->is_eof_) {
195		10	HandleScope handle_scope(pipe->env()->isolate());
196			InternalCallbackScope callback_scope(pipe,
197		5	InternalCallbackScope::kSkipTaskQueues);
198		5	pipe->sink()->Shutdown();
199		5	pipe->Unpipe();
200		5	return;
201			}
202
203	✓✓	193	if (status != 0) {
204	✗✓	1	CHECK_NOT_NULL(previous_listener_);
205		1	StreamListener* prev = previous_listener_;
206		1	pipe->Unpipe();
207		1	prev->OnStreamAfterWrite(w, status);
208		1	return;
209			}
210
211	✗✓	192	if (!pipe->uses_wants_write_) {
212			OnStreamWantsWrite(65536);
213			}
214			}
215
216			void StreamPipe::WritableListener::OnStreamAfterShutdown(ShutdownWrap* w,
217			int status) {
218			StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
219			CHECK_NOT_NULL(previous_listener_);
220			StreamListener* prev = previous_listener_;
221			pipe->Unpipe();
222			prev->OnStreamAfterShutdown(w, status);
223			}
224
225			void StreamPipe::ReadableListener::OnStreamDestroy() {
226			StreamPipe* pipe = ContainerOf(&StreamPipe::readable_listener_, this);
227			pipe->source_destroyed_ = true;
228			if (!pipe->is_eof_) {
229			OnStreamRead(UV_EPIPE, uv_buf_init(nullptr, 0));
230			}
231			}
232
233			void StreamPipe::WritableListener::OnStreamDestroy() {
234			StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
235			pipe->sink_destroyed_ = true;
236			pipe->is_eof_ = true;
237			pipe->pending_writes_ = 0;
238			pipe->Unpipe();
239			}
240
241		227	void StreamPipe::WritableListener::OnStreamWantsWrite(size_t suggested_size) {
242		227	StreamPipe* pipe = ContainerOf(&StreamPipe::writable_listener_, this);
243		227	pipe->wanted_data_ = suggested_size;
244	✓✓✗✓	227	if (pipe->is_reading_ \|\| pipe->is_closed_)
245		15	return;
246		424	HandleScope handle_scope(pipe->env()->isolate());
247			InternalCallbackScope callback_scope(pipe,
248		424	InternalCallbackScope::kSkipTaskQueues);
249		212	pipe->is_reading_ = true;
250		212	pipe->source()->ReadStart();
251			}
252
253			uv_buf_t StreamPipe::WritableListener::OnStreamAlloc(size_t suggested_size) {
254			CHECK_NOT_NULL(previous_listener_);
255			return previous_listener_->OnStreamAlloc(suggested_size);
256			}
257
258			void StreamPipe::WritableListener::OnStreamRead(ssize_t nread,
259			const uv_buf_t& buf) {
260			CHECK_NOT_NULL(previous_listener_);
261			return previous_listener_->OnStreamRead(nread, buf);
262			}
263
264		15	void StreamPipe::New(const FunctionCallbackInfo<Value>& args) {
265	✗✓	15	CHECK(args.IsConstructCall());
266	✗✓	15	CHECK(args[0]->IsObject());
267	✗✓	15	CHECK(args[1]->IsObject());
268	✓✗	30	StreamBase* source = StreamBase::FromObject(args[0].As<Object>());
269		30	StreamBase* sink = StreamBase::FromObject(args[1].As<Object>());
270
271		15	new StreamPipe(source, sink, args.This());
272		15	}
273
274		15	void StreamPipe::Start(const FunctionCallbackInfo<Value>& args) {
275			StreamPipe* pipe;
276	✗✓	15	ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
277		15	pipe->is_closed_ = false;
278		15	pipe->writable_listener_.OnStreamWantsWrite(65536);
279			}
280
281			void StreamPipe::Unpipe(const FunctionCallbackInfo<Value>& args) {
282			StreamPipe* pipe;
283			ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
284			pipe->Unpipe();
285			}
286
287			void StreamPipe::IsClosed(const FunctionCallbackInfo<Value>& args) {
288			StreamPipe* pipe;
289			ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
290			args.GetReturnValue().Set(pipe->is_closed_);
291			}
292
293			void StreamPipe::PendingWrites(const FunctionCallbackInfo<Value>& args) {
294			StreamPipe* pipe;
295			ASSIGN_OR_RETURN_UNWRAP(&pipe, args.Holder());
296			args.GetReturnValue().Set(pipe->pending_writes_);
297			}
298
299			namespace {
300
301		463	void InitializeStreamPipe(Local<Object> target,
302			Local<Value> unused,
303			Local<Context> context,
304			void* priv) {
305		463	Environment* env = Environment::GetCurrent(context);
306
307			// Create FunctionTemplate for FileHandle::CloseReq
308		463	Local<FunctionTemplate> pipe = env->NewFunctionTemplate(StreamPipe::New);
309		463	env->SetProtoMethod(pipe, "unpipe", StreamPipe::Unpipe);
310		463	env->SetProtoMethod(pipe, "start", StreamPipe::Start);
311		463	env->SetProtoMethod(pipe, "isClosed", StreamPipe::IsClosed);
312		463	env->SetProtoMethod(pipe, "pendingWrites", StreamPipe::PendingWrites);
313		463	pipe->Inherit(AsyncWrap::GetConstructorTemplate(env));
314		926	pipe->InstanceTemplate()->SetInternalFieldCount(
315			StreamPipe::kInternalFieldCount);
316		463	env->SetConstructorFunction(target, "StreamPipe", pipe);
317		463	}
318
319			} // anonymous namespace
320
321			} // namespace node
322
323		5255	NODE_MODULE_CONTEXT_AWARE_INTERNAL(stream_pipe,
324			node::InitializeStreamPipe)