src: do not use pointer for loop in node_watchdog

PR-URL: #28020
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: addaleax

src/node_watchdog.cc

@@ -34,22 +34,20 @@ Watchdog::Watchdog(v8::Isolate* isolate, uint64_t ms, bool* timed_out)
     : isolate_(isolate), timed_out_(timed_out) {
 
   int rc;
-  loop_ = new uv_loop_t;
-  CHECK(loop_);
-  rc = uv_loop_init(loop_);
+  rc = uv_loop_init(&loop_);
   if (rc != 0) {
     FatalError("node::Watchdog::Watchdog()",
                "Failed to initialize uv loop.");
   }
 
-  rc = uv_async_init(loop_, &async_, [](uv_async_t* signal) {
+  rc = uv_async_init(&loop_, &async_, [](uv_async_t* signal) {
     Watchdog* w = ContainerOf(&Watchdog::async_, signal);
-    uv_stop(w->loop_);
+    uv_stop(&w->loop_);
   });
 
   CHECK_EQ(0, rc);
 
-  rc = uv_timer_init(loop_, &timer_);
+  rc = uv_timer_init(&loop_, &timer_);
   CHECK_EQ(0, rc);
 
   rc = uv_timer_start(&timer_, &Watchdog::Timer, ms, 0);
@@ -67,11 +65,9 @@ Watchdog::~Watchdog() {
   uv_close(reinterpret_cast<uv_handle_t*>(&async_), nullptr);
 
   // UV_RUN_DEFAULT so that libuv has a chance to clean up.
-  uv_run(loop_, UV_RUN_DEFAULT);
+  uv_run(&loop_, UV_RUN_DEFAULT);
 
-  CheckedUvLoopClose(loop_);
-  delete loop_;
-  loop_ = nullptr;
+  CheckedUvLoopClose(&loop_);
 }
 
 
@@ -80,7 +76,7 @@ void Watchdog::Run(void* arg) {
 
   // UV_RUN_DEFAULT the loop will be stopped either by the async or the
   // timer handle.
-  uv_run(wd->loop_, UV_RUN_DEFAULT);
+  uv_run(&wd->loop_, UV_RUN_DEFAULT);
 
   // Loop ref count reaches zero when both handles are closed.
   // Close the timer handle on this side and let ~Watchdog() close async_
@@ -91,7 +87,7 @@ void Watchdog::Timer(uv_timer_t* timer) {
   Watchdog* w = ContainerOf(&Watchdog::timer_, timer);
   *w->timed_out_ = true;
   w->isolate()->TerminateExecution();
-  uv_stop(w->loop_);
+  uv_stop(&w->loop_);
 }
 
 

src/node_watchdog.h

@@ -49,7 +49,7 @@ class Watchdog {
 
   v8::Isolate* isolate_;
   uv_thread_t thread_;
-  uv_loop_t* loop_;
+  uv_loop_t loop_;
   uv_async_t async_;
   uv_timer_t timer_;
   bool* timed_out_;