src: lock-free init_process_flags

Fix #45152

Author: kapouer

src/node.cc

@@ -429,7 +429,7 @@ void ResetSignalHandlers() {
 #endif  // __POSIX__
 }
 
-static std::atomic<uint64_t> init_process_flags = 0;
+static std::atomic<uint32_t> init_process_flags = 0;
 
 static void PlatformInit(ProcessInitializationFlags::Flags flags) {
   // init_process_flags is accessed in ResetStdio(),

src/node.h

@@ -228,7 +228,8 @@ class MultiIsolatePlatform;
 class InitializationResultImpl;
 
 namespace ProcessFlags {
-enum Flags : uint64_t {
+// TODO: Switch to uint32_t to match std::atomic<uint32_t> init_process_flags in node.cc
+enum Flags : uint32_t {
   kNoFlags = 0,
   // Enable stdio inheritance, which is disabled by default.
   // This flag is also implied by kNoStdioInitialization.