nodejs
diff --git a/Collapse file
‎src/node_external_reference.h‎
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+3Lines changed: 3 additions & 0 deletions b/Collapse file
‎src/node_external_reference.h‎
Copy file name to clipboardExpand all lines: src/node_external_reference.h
+3Lines changed: 3 additions & 0 deletions
diff --git a/Collapse file
‎src/node_util.cc‎
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+41-1Lines changed: 41 additions & 1 deletion b/Collapse file
‎src/node_util.cc‎
Copy file name to clipboardExpand all lines: src/node_util.cc
+41-1Lines changed: 41 additions & 1 deletion
@@ -21,6 +21,8 @@ using CFunctionCallbackWithBool = void (*)(v8::Local<v8::Object> receiver,
                                            bool);
 using CFunctionCallbackWithStrings =
     bool (*)(v8::Local<v8::Value>, const v8::FastOneByteString& input);
+using CFunctionWithUint32 = uint32_t (*)(v8::Local<v8::Value>,
+                                         const uint32_t input);
 
 // This class manages the external references from the V8 heap
 // to the C++ addresses in Node.js.
@@ -35,6 +37,7 @@ class ExternalReferenceRegistry {
   V(CFunctionCallbackWithInt64)                                                \
   V(CFunctionCallbackWithBool)                                                 \
   V(CFunctionCallbackWithStrings)                                              \
+  V(CFunctionWithUint32)                                                       \
   V(const v8::CFunctionInfo*)                                                  \
   V(v8::FunctionCallback)                                                      \
   V(v8::AccessorGetterCallback)                                                \
 
@@ -3,6 +3,7 @@
 #include "node_errors.h"
 #include "node_external_reference.h"
 #include "util-inl.h"
+#include "v8-fast-api-calls.h"
 
 namespace node {
 namespace util {
@@ -12,6 +13,7 @@ using v8::Array;
 using v8::ArrayBufferView;
 using v8::BigInt;
 using v8::Boolean;
+using v8::CFunction;
 using v8::Context;
 using v8::External;
 using v8::FunctionCallbackInfo;
@@ -322,6 +324,38 @@ static void GuessHandleType(const FunctionCallbackInfo<Value>& args) {
   args.GetReturnValue().Set(type);
 }
 
+static uint32_t FastGuessHandleType(Local<Value> receiver, const uint32_t fd) {
+  uv_handle_type t = uv_guess_handle(fd);
+  uint32_t type{0};
+
+  switch (t) {
+    case UV_TCP:
+      type = 0;
+      break;
+    case UV_TTY:
+      type = 1;
+      break;
+    case UV_UDP:
+      type = 2;
+      break;
+    case UV_FILE:
+      type = 3;
+      break;
+    case UV_NAMED_PIPE:
+      type = 4;
+      break;
+    case UV_UNKNOWN_HANDLE:
+      type = 5;
+      break;
+    default:
+      ABORT();
+  }
+
+  return type;
+}
+
+CFunction fast_guess_handle_type_(CFunction::Make(FastGuessHandleType));
+
 static void ToUSVString(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
   CHECK_GE(args.Length(), 2);
@@ -371,6 +405,8 @@ void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
   registry->Register(WeakReference::IncRef);
   registry->Register(WeakReference::DecRef);
   registry->Register(GuessHandleType);
+  registry->Register(FastGuessHandleType);
+  registry->Register(fast_guess_handle_type_.GetTypeInfo());
   registry->Register(ToUSVString);
 }
 
@@ -474,7 +510,11 @@ void Initialize(Local<Object> target,
   SetProtoMethod(isolate, weak_ref, "decRef", WeakReference::DecRef);
   SetConstructorFunction(context, target, "WeakReference", weak_ref);
 
-  SetMethod(context, target, "guessHandleType", GuessHandleType);
+  SetFastMethodNoSideEffect(context,
+                            target,
+                            "guessHandleType",
+                            GuessHandleType,
+                            &fast_guess_handle_type_);
 
   SetMethodNoSideEffect(context, target, "toUSVString", ToUSVString);
 }