src: add convenience ctor for async trigger id scope

This backport differs from the original only in the
omission of a change to `stream_base-inl.h` which
would have generated conflicts.

Backport-PR-URL: #21600
PR-URL: #19204
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Author: addaleax

src/async_wrap-inl.h

@@ -64,6 +64,13 @@ inline v8::MaybeLocal<v8::Value> AsyncWrap::MakeCallback(
   return MakeCallback(cb_v.As<v8::Function>(), argc, argv);
 }
 
+
+// Defined here to avoid a circular dependency with env-inl.h.
+inline Environment::AsyncHooks::DefaultTriggerAsyncIdScope
+  ::DefaultTriggerAsyncIdScope(AsyncWrap* async_wrap)
+    : DefaultTriggerAsyncIdScope(async_wrap->env(),
+                                 async_wrap->get_async_id()) {}
+
 }  // namespace node
 
 #endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

src/async_wrap.cc

@@ -331,8 +331,7 @@ static void PromiseHook(PromiseHookType type, Local<Promise> promise,
         parent_wrap = PromiseWrap::New(env, parent_promise, nullptr, true);
       }
 
-      AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(
-        env, parent_wrap->get_async_id());
+      AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(parent_wrap);
       wrap = PromiseWrap::New(env, promise, parent_wrap, silent);
     } else {
       wrap = PromiseWrap::New(env, promise, nullptr, silent);

src/env-inl.h

@@ -167,6 +167,9 @@ inline void Environment::AsyncHooks::clear_async_id_stack() {
   fields_[kStackLength] = 0;
 }
 
+// The DefaultTriggerAsyncIdScope(AsyncWrap*) constructor is defined in
+// async_wrap-inl.h to avoid a circular dependency.
+
 inline Environment::AsyncHooks::DefaultTriggerAsyncIdScope
   ::DefaultTriggerAsyncIdScope(Environment* env,
                                double default_trigger_async_id)

src/env.h

@@ -432,6 +432,7 @@ class Environment {
       DefaultTriggerAsyncIdScope() = delete;
       explicit DefaultTriggerAsyncIdScope(Environment* env,
                                           double init_trigger_async_id);
+      explicit DefaultTriggerAsyncIdScope(AsyncWrap* async_wrap);
       ~DefaultTriggerAsyncIdScope();
 
      private:

src/pipe_wrap.cc

@@ -52,8 +52,7 @@ Local<Object> PipeWrap::Instantiate(Environment* env,
                                     AsyncWrap* parent,
                                     PipeWrap::SocketType type) {
   EscapableHandleScope handle_scope(env->isolate());
-  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(env,
-                                                       parent->get_async_id());
+  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(parent);
   CHECK_EQ(false, env->pipe_constructor_template().IsEmpty());
   Local<Function> constructor = env->pipe_constructor_template()->GetFunction();
   CHECK_EQ(false, constructor.IsEmpty());

src/tcp_wrap.cc

@@ -56,8 +56,7 @@ Local<Object> TCPWrap::Instantiate(Environment* env,
                                    AsyncWrap* parent,
                                    TCPWrap::SocketType type) {
   EscapableHandleScope handle_scope(env->isolate());
-  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(
-    env, parent->get_async_id());
+  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(parent);
   CHECK_EQ(env->tcp_constructor_template().IsEmpty(), false);
   Local<Function> constructor = env->tcp_constructor_template()->GetFunction();
   CHECK_EQ(constructor.IsEmpty(), false);
@@ -294,8 +293,7 @@ void TCPWrap::Connect(const FunctionCallbackInfo<Value>& args) {
   int err = uv_ip4_addr(*ip_address, port, &addr);
 
   if (err == 0) {
-    AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(
-      env, wrap->get_async_id());
+    AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(wrap);
     ConnectWrap* req_wrap =
         new ConnectWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_TCPCONNECTWRAP);
     err = uv_tcp_connect(req_wrap->req(),
@@ -331,8 +329,7 @@ void TCPWrap::Connect6(const FunctionCallbackInfo<Value>& args) {
   int err = uv_ip6_addr(*ip_address, port, &addr);
 
   if (err == 0) {
-    AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(
-      env, wrap->get_async_id());
+    AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(wrap);
     ConnectWrap* req_wrap =
         new ConnectWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_TCPCONNECTWRAP);
     err = uv_tcp_connect(req_wrap->req(),

src/udp_wrap.cc

@@ -356,8 +356,7 @@ void UDPWrap::DoSend(const FunctionCallbackInfo<Value>& args, int family) {
 
   SendWrap* req_wrap;
   {
-    AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(
-      env, wrap->get_async_id());
+    AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(wrap);
     req_wrap = new SendWrap(env, req_wrap_obj, have_callback);
   }
   size_t msg_size = 0;
@@ -508,8 +507,7 @@ Local<Object> UDPWrap::Instantiate(Environment* env,
                                    AsyncWrap* parent,
                                    UDPWrap::SocketType type) {
   EscapableHandleScope scope(env->isolate());
-  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(
-    env, parent->get_async_id());
+  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(parent);
 
   // If this assert fires then Initialize hasn't been called yet.
   CHECK_EQ(env->udp_constructor_function().IsEmpty(), false);