stream_base: dispatch reqs in the stream impl

Dispatch requests in the implementation of the stream, not in the code
creating these requests. The requests might be piled up and invoked
internally in the implementation, so it should know better when it is
the time to dispatch them.

In fact, TLS was doing exactly this thing which led us to...

Fix: #1512

Author: indutny

src/js_stream.cc

@@ -73,6 +73,7 @@ int JSStream::DoShutdown(ShutdownWrap* req_wrap) {
 
   Local<Value> res =
       MakeCallback(env()->onshutdown_string(), ARRAY_SIZE(argv), argv);
+  req_wrap->Dispatched();
 
   return res->Int32Value();
 }
@@ -95,6 +96,7 @@ int JSStream::DoWrite(WriteWrap* w,
     bufs_arr
   };
 
+  w->Dispatched();
   Local<Value> res =
       MakeCallback(env()->onwrite_string(), ARRAY_SIZE(argv), argv);
 

src/stream_base.cc

@@ -60,7 +60,6 @@ int StreamBase::Shutdown(const FunctionCallbackInfo<Value>& args) {
                                             AfterShutdown);
 
   int err = DoShutdown(req_wrap);
-  req_wrap->Dispatched();
   if (err)
     delete req_wrap;
   return err;
@@ -181,7 +180,6 @@ int StreamBase::Writev(const FunctionCallbackInfo<Value>& args) {
   if (bufs != bufs_)
     delete[] bufs;
 
-  req_wrap->Dispatched();
   req_wrap->object()->Set(env->async(), True(env->isolate()));
   req_wrap->object()->Set(env->bytes_string(),
                           Number::New(env->isolate(), bytes));
@@ -228,7 +226,6 @@ int StreamBase::WriteBuffer(const FunctionCallbackInfo<Value>& args) {
   req_wrap = WriteWrap::New(env, req_wrap_obj, this, AfterWrite);
 
   err = DoWrite(req_wrap, bufs, count, nullptr);
-  req_wrap->Dispatched();
   req_wrap_obj->Set(env->async(), True(env->isolate()));
 
   if (err)
@@ -347,7 +344,6 @@ int StreamBase::WriteString(const FunctionCallbackInfo<Value>& args) {
         reinterpret_cast<uv_stream_t*>(send_handle));
   }
 
-  req_wrap->Dispatched();
   req_wrap->object()->Set(env->async(), True(env->isolate()));
 
   if (err)

src/stream_wrap.cc

@@ -279,7 +279,10 @@ void StreamWrap::SetBlocking(const FunctionCallbackInfo<Value>& args) {
 
 
 int StreamWrap::DoShutdown(ShutdownWrap* req_wrap) {
-  return uv_shutdown(&req_wrap->req_, stream(), AfterShutdown);
+  int err;
+  err = uv_shutdown(&req_wrap->req_, stream(), AfterShutdown);
+  req_wrap->Dispatched();
+  return err;
 }
 
 
@@ -353,6 +356,7 @@ int StreamWrap::DoWrite(WriteWrap* w,
     }
   }
 
+  w->Dispatched();
   UpdateWriteQueueSize();
 
   return r;

src/tls_wrap.cc

@@ -306,7 +306,6 @@ void TLSWrap::EncOut() {
   for (size_t i = 0; i < count; i++)
     buf[i] = uv_buf_init(data[i], size[i]);
   int err = stream_->DoWrite(write_req, buf, count, nullptr);
-  write_req->Dispatched();
 
   // Ignore errors, this should be already handled in js
   if (err) {
@@ -558,6 +557,7 @@ int TLSWrap::DoWrite(WriteWrap* w,
 
   // Queue callback to execute it on next tick
   write_item_queue_.PushBack(new WriteItem(w));
+  w->Dispatched();
 
   // Write queued data
   if (empty) {