os: add os.{get,set}Priority()

PR-URL: https://github.com/nodejs/node/pull/22407
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/src/node_os.cc b/src/node_os.cc
index c9eef808b0a..d3e9460f473 100644
--- a/src/node_os.cc
+++ b/src/node_os.cc
@@ -52,6 +52,7 @@ using v8::Context;
 using v8::Float64Array;
 using v8::Function;
 using v8::FunctionCallbackInfo;
+using v8::Int32;
 using v8::Integer;
 using v8::Local;
 using v8::MaybeLocal;
@@ -405,6 +406,46 @@ static void GetUserInfo(const FunctionCallbackInfo<Value>& args) {
 }
 
 
+static void SetPriority(const FunctionCallbackInfo<Value>& args) {
+  Environment* env = Environment::GetCurrent(args);
+
+  CHECK_EQ(args.Length(), 3);
+  CHECK(args[0]->IsInt32());
+  CHECK(args[1]->IsInt32());
+
+  const int pid = args[0].As<Int32>()->Value();
+  const int priority = args[1].As<Int32>()->Value();
+  const int err = uv_os_setpriority(pid, priority);
+
+  if (err) {
+    CHECK(args[2]->IsObject());
+    env->CollectUVExceptionInfo(args[2], err, "uv_os_setpriority");
+  }
+
+  args.GetReturnValue().Set(err);
+}
+
+
+static void GetPriority(const FunctionCallbackInfo<Value>& args) {
+  Environment* env = Environment::GetCurrent(args);
+
+  CHECK_EQ(args.Length(), 2);
+  CHECK(args[0]->IsInt32());
+
+  const int pid = args[0].As<Int32>()->Value();
+  int priority;
+  const int err = uv_os_getpriority(pid, &priority);
+
+  if (err) {
+    CHECK(args[1]->IsObject());
+    env->CollectUVExceptionInfo(args[1], err, "uv_os_getpriority");
+    return;
+  }
+
+  args.GetReturnValue().Set(priority);
+}
+
+
 void Initialize(Local<Object> target,
                 Local<Value> unused,
                 Local<Context> context) {
@@ -420,6 +461,8 @@ void Initialize(Local<Object> target,
   env->SetMethod(target, "getInterfaceAddresses", GetInterfaceAddresses);
   env->SetMethod(target, "getHomeDirectory", GetHomeDirectory);
   env->SetMethod(target, "getUserInfo", GetUserInfo);
+  env->SetMethod(target, "setPriority", SetPriority);
+  env->SetMethod(target, "getPriority", GetPriority);
   target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "isBigEndian"),
               Boolean::New(env->isolate(), IsBigEndian()));
 }