src: use nullptr instead of NULL

PR-URL: https://github.com/nodejs/node/pull/17373
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

3 files changed, 5 insertions, 5 deletions

diff --git a/src/tracing/node_trace_buffer.cc b/src/tracing/node_trace_buffer.cc
index c8d71b762e..4c9f7c658f 100644
--- a/src/tracing/node_trace_buffer.cc
+++ b/src/tracing/node_trace_buffer.cc
@@ -32,7 +32,7 @@ TraceObject* InternalTraceBuffer::GetEventByHandle(uint64_t handle) {
   Mutex::ScopedLock scoped_lock(mutex_);
   if (handle == 0) {
     // A handle value of zero never has a trace event associated with it.
-    return NULL;
+    return nullptr;
   }
   size_t chunk_index, event_index;
   uint32_t buffer_id, chunk_seq;
@@ -41,12 +41,12 @@ TraceObject* InternalTraceBuffer::GetEventByHandle(uint64_t handle) {
     // Either the chunk belongs to the other buffer, or is outside the current
     // range of chunks loaded in memory (the latter being true suggests that
     // the chunk has already been flushed and is no longer in memory.)
-    return NULL;
+    return nullptr;
   }
   auto& chunk = chunks_[chunk_index];
   if (chunk->seq() != chunk_seq) {
     // Chunk is no longer in memory.
-    return NULL;
+    return nullptr;
   }
   return chunk->GetEventAt(event_index);
 }
diff --git a/src/tracing/node_trace_writer.cc b/src/tracing/node_trace_writer.cc
index ff3c981d10..9293e9cb8f 100644
--- a/src/tracing/node_trace_writer.cc
+++ b/src/tracing/node_trace_writer.cc
@@ -60,7 +60,7 @@ void NodeTraceWriter::OpenNewFileForStreaming() {
   std::ostringstream log_file;
   log_file << "node_trace." << file_num_ << ".log";
   fd_ = uv_fs_open(tracing_loop_, &req, log_file.str().c_str(),
-      O_CREAT | O_WRONLY | O_TRUNC, 0644, NULL);
+      O_CREAT | O_WRONLY | O_TRUNC, 0644, nullptr);
   CHECK_NE(fd_, -1);
   uv_fs_req_cleanup(&req);
 }
diff --git a/src/tracing/trace_event.h b/src/tracing/trace_event.h
index 2b4c1e36cf..44a30f38e5 100644
--- a/src/tracing/trace_event.h
+++ b/src/tracing/trace_event.h
@@ -518,7 +518,7 @@ static inline uint64_t AddTraceEvent(
 class ScopedTracer {
  public:
   // Note: members of data_ intentionally left uninitialized. See Initialize.
-  ScopedTracer() : p_data_(NULL) {}
+  ScopedTracer() : p_data_(nullptr) {}
 
   ~ScopedTracer() {
     if (p_data_ && *data_.category_group_enabled)