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stream_wrap: use getters, not direct field access 

Hide member fields behind getters. Make the fields themselves const
in the sense that the pointer is non-assignable - the pointed to object
remains mutable.

Makes reasoning about lifecycle and mutability a little easier.
v0.11.6-release
Ben Noordhuis 12 years ago
parent
4692b725de
commit
da5ad92ab2
3 changed files with 84 additions and 72 deletions
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  1. 101
      src/stream_wrap.cc
  2. 45
      src/stream_wrap.h
  3. 10
      src/tls_wrap.cc

101
src/stream_wrap.cc
View File

@ -76,9 +76,9 @@ void StreamWrap::Initialize(Handle<Object> target) {
StreamWrap::StreamWrap(Handle<Object> object, uv_stream_t* stream)
: HandleWrap(object, reinterpret_cast<uv_handle_t*>(stream)),
default_callbacks_(this) {
stream_ = stream;
callbacks_ = &default_callbacks_;
stream_(stream),
default_callbacks_(this),
callbacks_(&default_callbacks_) {
}
@ -87,7 +87,9 @@ void StreamWrap::GetFD(Local<String>, const PropertyCallbackInfo<Value>& args) {
HandleScope scope(node_isolate);
UNWRAP_NO_ABORT(StreamWrap)
int fd = -1;
if (wrap != NULL && wrap->stream_ != NULL) fd = wrap->stream_->io_watcher.fd;
if (wrap != NULL && wrap->stream() != NULL) {
fd = wrap->stream()->io_watcher.fd;
}
args.GetReturnValue().Set(fd);
#endif
}
@ -96,7 +98,7 @@ void StreamWrap::GetFD(Local<String>, const PropertyCallbackInfo<Value>& args) {
void StreamWrap::UpdateWriteQueueSize() {
HandleScope scope(node_isolate);
object()->Set(write_queue_size_sym,
Integer::New(stream_->write_queue_size, node_isolate));
Integer::New(stream()->write_queue_size, node_isolate));
}
@ -105,13 +107,13 @@ void StreamWrap::ReadStart(const FunctionCallbackInfo<Value>& args) {
UNWRAP(StreamWrap)
bool ipc_pipe = wrap->stream_->type == UV_NAMED_PIPE &&
reinterpret_cast<uv_pipe_t*>(wrap->stream_)->ipc;
bool ipc_pipe = wrap->stream()->type == UV_NAMED_PIPE &&
reinterpret_cast<uv_pipe_t*>(wrap->stream())->ipc;
int err;
if (ipc_pipe) {
err = uv_read2_start(wrap->stream_, OnAlloc, OnRead2);
err = uv_read2_start(wrap->stream(), OnAlloc, OnRead2);
} else {
err = uv_read_start(wrap->stream_, OnAlloc, OnRead);
err = uv_read_start(wrap->stream(), OnAlloc, OnRead);
}
args.GetReturnValue().Set(err);
@ -123,16 +125,15 @@ void StreamWrap::ReadStop(const FunctionCallbackInfo<Value>& args) {
UNWRAP(StreamWrap)
int err = uv_read_stop(wrap->stream_);
int err = uv_read_stop(wrap->stream());
args.GetReturnValue().Set(err);
}
uv_buf_t StreamWrap::OnAlloc(uv_handle_t* handle, size_t suggested_size) {
StreamWrap* wrap = static_cast<StreamWrap*>(handle->data);
assert(wrap->stream_ == reinterpret_cast<uv_stream_t*>(handle));
return wrap->callbacks_->DoAlloc(handle, suggested_size);
assert(wrap->stream() == reinterpret_cast<uv_stream_t*>(handle));
return wrap->callbacks()->DoAlloc(handle, suggested_size);
}
@ -171,14 +172,14 @@ void StreamWrap::OnReadCommon(uv_stream_t* handle,
assert(wrap->persistent().IsEmpty() == false);
if (nread > 0) {
if (wrap->stream_->type == UV_TCP) {
if (wrap->stream()->type == UV_TCP) {
NODE_COUNT_NET_BYTES_RECV(nread);
} else if (wrap->stream_->type == UV_NAMED_PIPE) {
} else if (wrap->stream()->type == UV_NAMED_PIPE) {
NODE_COUNT_PIPE_BYTES_RECV(nread);
}
}
wrap->callbacks_->DoRead(handle, nread, buf, pending);
wrap->callbacks()->DoRead(handle, nread, buf, pending);
}
@ -224,11 +225,11 @@ void StreamWrap::WriteBuffer(const FunctionCallbackInfo<Value>& args) {
uv_buf_t buf;
WriteBuffer(buf_obj, &buf);
int err = wrap->callbacks_->DoWrite(req_wrap,
&buf,
1,
NULL,
StreamWrap::AfterWrite);
int err = wrap->callbacks()->DoWrite(req_wrap,
&buf,
1,
NULL,
StreamWrap::AfterWrite);
req_wrap->Dispatched();
req_wrap_obj->Set(bytes_sym, Integer::NewFromUnsigned(length, node_isolate));
@ -284,15 +285,15 @@ void StreamWrap::WriteStringImpl(const FunctionCallbackInfo<Value>& args) {
buf.base = data;
buf.len = data_size;
bool ipc_pipe = wrap->stream_->type == UV_NAMED_PIPE &&
reinterpret_cast<uv_pipe_t*>(wrap->stream_)->ipc;
bool ipc_pipe = wrap->stream()->type == UV_NAMED_PIPE &&
reinterpret_cast<uv_pipe_t*>(wrap->stream())->ipc;
if (!ipc_pipe) {
err = wrap->callbacks_->DoWrite(req_wrap,
&buf,
1,
NULL,
StreamWrap::AfterWrite);
err = wrap->callbacks()->DoWrite(req_wrap,
&buf,
1,
NULL,
StreamWrap::AfterWrite);
} else {
uv_handle_t* send_handle = NULL;
@ -312,11 +313,11 @@ void StreamWrap::WriteStringImpl(const FunctionCallbackInfo<Value>& args) {
req_wrap->object()->Set(handle_sym, send_handle_obj);
}
err = wrap->callbacks_->DoWrite(req_wrap,
&buf,
1,
reinterpret_cast<uv_stream_t*>(send_handle),
StreamWrap::AfterWrite);
err = wrap->callbacks()->DoWrite(req_wrap,
&buf,
1,
reinterpret_cast<uv_stream_t*>(send_handle),
StreamWrap::AfterWrite);
}
req_wrap->Dispatched();
@ -407,11 +408,11 @@ void StreamWrap::Writev(const FunctionCallbackInfo<Value>& args) {
bytes += str_size;
}
int err = wrap->callbacks_->DoWrite(req_wrap,
bufs,
count,
NULL,
StreamWrap::AfterWrite);
int err = wrap->callbacks()->DoWrite(req_wrap,
bufs,
count,
NULL,
StreamWrap::AfterWrite);
// Deallocate space
if (bufs != bufs_)
@ -446,7 +447,7 @@ void StreamWrap::WriteUcs2String(const FunctionCallbackInfo<Value>& args) {
void StreamWrap::AfterWrite(uv_write_t* req, int status) {
WriteWrap* req_wrap = container_of(req, WriteWrap, req_);
StreamWrap* wrap = req_wrap->wrap_;
StreamWrap* wrap = req_wrap->wrap();
HandleScope scope(node_isolate);
@ -460,7 +461,7 @@ void StreamWrap::AfterWrite(uv_write_t* req, int status) {
req_wrap_obj->Delete(handle_sym);
}
wrap->callbacks_->AfterWrite(req_wrap);
wrap->callbacks()->AfterWrite(req_wrap);
Local<Value> argv[] = {
Integer::New(status, node_isolate),
@ -484,7 +485,7 @@ void StreamWrap::Shutdown(const FunctionCallbackInfo<Value>& args) {
Local<Object> req_wrap_obj = args[0].As<Object>();
ShutdownWrap* req_wrap = new ShutdownWrap(req_wrap_obj);
int err = wrap->callbacks_->DoShutdown(req_wrap, AfterShutdown);
int err = wrap->callbacks()->DoShutdown(req_wrap, AfterShutdown);
req_wrap->Dispatched();
if (err) delete req_wrap;
args.GetReturnValue().Set(err);
@ -521,30 +522,30 @@ int StreamWrapCallbacks::DoWrite(WriteWrap* w,
uv_write_cb cb) {
int r;
if (send_handle == NULL) {
r = uv_write(&w->req_, wrap_->stream_, bufs, count, cb);
r = uv_write(&w->req_, wrap()->stream(), bufs, count, cb);
} else {
r = uv_write2(&w->req_, wrap_->stream_, bufs, count, send_handle, cb);
r = uv_write2(&w->req_, wrap()->stream(), bufs, count, send_handle, cb);
}
if (!r) {
size_t bytes = 0;
for (size_t i = 0; i < count; i++)
bytes += bufs[i].len;
if (wrap_->stream_->type == UV_TCP) {
if (wrap()->stream()->type == UV_TCP) {
NODE_COUNT_NET_BYTES_SENT(bytes);
} else if (wrap_->stream_->type == UV_NAMED_PIPE) {
} else if (wrap()->stream()->type == UV_NAMED_PIPE) {
NODE_COUNT_PIPE_BYTES_SENT(bytes);
}
}
wrap_->UpdateWriteQueueSize();
wrap()->UpdateWriteQueueSize();
return r;
}
void StreamWrapCallbacks::AfterWrite(WriteWrap* w) {
wrap_->UpdateWriteQueueSize();
wrap()->UpdateWriteQueueSize();
}
@ -603,17 +604,17 @@ void StreamWrapCallbacks::DoRead(uv_stream_t* handle,
argv[2] = pending_obj;
}
MakeCallback(wrap_->object(), onread_sym, ARRAY_SIZE(argv), argv);
MakeCallback(wrap()->object(), onread_sym, ARRAY_SIZE(argv), argv);
}
int StreamWrapCallbacks::DoShutdown(ShutdownWrap* req_wrap, uv_shutdown_cb cb) {
return uv_shutdown(&req_wrap->req_, wrap_->stream_, cb);
return uv_shutdown(&req_wrap->req_, wrap()->stream(), cb);
}
Handle<Object> StreamWrapCallbacks::Self() {
return wrap_->object();
return wrap()->object();
}
} // namespace node

45
src/stream_wrap.h
View File

@ -37,9 +37,9 @@ typedef class ReqWrap<uv_shutdown_t> ShutdownWrap;
class WriteWrap: public ReqWrap<uv_write_t> {
public:
explicit WriteWrap(v8::Local<v8::Object> obj, StreamWrap* wrap)
: ReqWrap<uv_write_t>(obj) {
wrap_ = wrap;
WriteWrap(v8::Local<v8::Object> obj, StreamWrap* wrap)
: ReqWrap<uv_write_t>(obj)
, wrap_(wrap) {
}
void* operator new(size_t size, char* storage) { return storage; }
@ -48,13 +48,17 @@ class WriteWrap: public ReqWrap<uv_write_t> {
// we don't use exceptions in node.
void operator delete(void* ptr, char* storage) { assert(0); }
StreamWrap* wrap_;
inline StreamWrap* wrap() const {
return wrap_;
}
protected:
private:
// 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); }
StreamWrap* const wrap_;
};
// Overridable callbacks' types
@ -63,7 +67,7 @@ class StreamWrapCallbacks {
explicit StreamWrapCallbacks(StreamWrap* wrap) : wrap_(wrap) {
}
explicit StreamWrapCallbacks(StreamWrapCallbacks* old) : wrap_(old->wrap_) {
explicit StreamWrapCallbacks(StreamWrapCallbacks* old) : wrap_(old->wrap()) {
}
virtual ~StreamWrapCallbacks() {
@ -85,13 +89,16 @@ class StreamWrapCallbacks {
v8::Handle<v8::Object> Self();
protected:
StreamWrap* wrap_;
inline StreamWrap* wrap() const {
return wrap_;
}
private:
StreamWrap* const wrap_;
};
class StreamWrap : public HandleWrap {
public:
uv_stream_t* GetStream() { return stream_; }
void OverrideCallbacks(StreamWrapCallbacks* callbacks) {
StreamWrapCallbacks* old = callbacks_;
callbacks_ = callbacks;
@ -99,10 +106,6 @@ class StreamWrap : public HandleWrap {
delete old;
}
StreamWrapCallbacks* GetCallbacks() {
return callbacks_;
}
static void Initialize(v8::Handle<v8::Object> target);
static void GetFD(v8::Local<v8::String>,
@ -119,19 +122,26 @@ class StreamWrap : public HandleWrap {
static void WriteUtf8String(const v8::FunctionCallbackInfo<v8::Value>& args);
static void WriteUcs2String(const v8::FunctionCallbackInfo<v8::Value>& args);
// Overridable callbacks
StreamWrapCallbacks* callbacks_;
inline StreamWrapCallbacks* callbacks() const {
return callbacks_;
}
inline uv_stream_t* stream() const {
return stream_;
}
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();
@ -150,9 +160,10 @@ class StreamWrap : public HandleWrap {
template <enum encoding encoding>
static void WriteStringImpl(const v8::FunctionCallbackInfo<v8::Value>& args);
uv_stream_t* stream_;
uv_stream_t* const stream_;
StreamWrapCallbacks default_callbacks_;
StreamWrapCallbacks* callbacks_; // Overridable callbacks
friend class StreamWrapCallbacks;
};

10
src/tls_wrap.cc
View File

@ -316,7 +316,7 @@ void TLSCallbacks::Wrap(const FunctionCallbackInfo<Value>& args) {
TLSCallbacks* callbacks = NULL;
WITH_GENERIC_STREAM(stream, {
callbacks = new TLSCallbacks(kind, sc, wrap->GetCallbacks());
callbacks = new TLSCallbacks(kind, sc, wrap->callbacks());
wrap->OverrideCallbacks(callbacks);
});
@ -394,13 +394,13 @@ void TLSCallbacks::EncOut() {
write_req_.data = this;
uv_buf_t buf = uv_buf_init(data, write_size_);
int r = uv_write(&write_req_, wrap_->GetStream(), &buf, 1, EncOutCb);
int r = uv_write(&write_req_, wrap()->stream(), &buf, 1, EncOutCb);
// Ignore errors, this should be already handled in js
if (!r) {
if (wrap_->GetStream()->type == UV_TCP) {
if (wrap()->stream()->type == UV_TCP) {
NODE_COUNT_NET_BYTES_SENT(write_size_);
} else if (wrap_->GetStream()->type == UV_NAMED_PIPE) {
} else if (wrap()->stream()->type == UV_NAMED_PIPE) {
NODE_COUNT_PIPE_BYTES_SENT(write_size_);
}
}
@ -560,7 +560,7 @@ int TLSCallbacks::DoWrite(WriteWrap* w,
// However if there any data that should be written to socket,
// callback should not be invoked immediately
if (BIO_pending(enc_out_) == 0)
return uv_write(&w->req_, wrap_->GetStream(), bufs, count, cb);
return uv_write(&w->req_, wrap()->stream(), bufs, count, cb);
}
QUEUE_INSERT_TAIL(&write_item_queue_, &wi->member_);

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