GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: handle_wrap.cc Lines: 79 83 95.2 %
Date: 2021-09-08 04:14:13 Branches: 38 50 76.0 %

Line Branch Exec Source
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "handle_wrap.h"
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#include "async_wrap-inl.h"
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#include "env-inl.h"
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#include "node_external_reference.h"
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#include "util-inl.h"
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namespace node {
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using v8::Context;
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using v8::FunctionCallbackInfo;
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using v8::FunctionTemplate;
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using v8::HandleScope;
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using v8::Local;
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using v8::Object;
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using v8::Value;
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void HandleWrap::Ref(const FunctionCallbackInfo<Value>& args) {
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  HandleWrap* wrap;
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  ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
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  if (IsAlive(wrap))
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    uv_ref(wrap->GetHandle());
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}
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void HandleWrap::Unref(const FunctionCallbackInfo<Value>& args) {
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  HandleWrap* wrap;
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  ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
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  if (IsAlive(wrap))
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    uv_unref(wrap->GetHandle());
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}
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void HandleWrap::HasRef(const FunctionCallbackInfo<Value>& args) {
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  HandleWrap* wrap;
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  ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
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  args.GetReturnValue().Set(HasRef(wrap));
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}
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void HandleWrap::Close(const FunctionCallbackInfo<Value>& args) {
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  HandleWrap* wrap;
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  ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
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  wrap->Close(args[0]);
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}
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void HandleWrap::Close(Local<Value> close_callback) {
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  if (state_ != kInitialized)
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    return;
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  uv_close(handle_, OnClose);
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  state_ = kClosing;
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  if (!close_callback.IsEmpty() && close_callback->IsFunction() &&
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      !persistent().IsEmpty()) {
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    object()->Set(env()->context(),
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                  env()->handle_onclose_symbol(),
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                  close_callback).Check();
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  }
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}
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void HandleWrap::OnGCCollect() {
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  // When all references to a HandleWrap are lost and the object is supposed to
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  // be destroyed, we first call Close() to clean up the underlying libuv
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  // handle. The OnClose callback then acquires and destroys another reference
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  // to that object, and when that reference is lost, we perform the default
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  // action (i.e. destroying `this`).
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  if (state_ != kClosed) {
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    Close();
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  } else {
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    BaseObject::OnGCCollect();
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  }
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}
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bool HandleWrap::IsNotIndicativeOfMemoryLeakAtExit() const {
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  return IsWeakOrDetached() ||
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         !HandleWrap::HasRef(this) ||
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         !uv_is_active(GetHandle());
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}
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void HandleWrap::MarkAsInitialized() {
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  env()->handle_wrap_queue()->PushBack(this);
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  state_ = kInitialized;
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}
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void HandleWrap::MarkAsUninitialized() {
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  handle_wrap_queue_.Remove();
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  state_ = kClosed;
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}
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HandleWrap::HandleWrap(Environment* env,
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                       Local<Object> object,
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                       uv_handle_t* handle,
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                       AsyncWrap::ProviderType provider)
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    : AsyncWrap(env, object, provider),
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      state_(kInitialized),
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      handle_(handle) {
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  handle_->data = this;
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  HandleScope scope(env->isolate());
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  CHECK(env->has_run_bootstrapping_code());
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  env->handle_wrap_queue()->PushBack(this);
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}
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void HandleWrap::OnClose(uv_handle_t* handle) {
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  CHECK_NOT_NULL(handle->data);
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  BaseObjectPtr<HandleWrap> wrap { static_cast<HandleWrap*>(handle->data) };
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  wrap->Detach();
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  Environment* env = wrap->env();
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  HandleScope scope(env->isolate());
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  Context::Scope context_scope(env->context());
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  CHECK_EQ(wrap->state_, kClosing);
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  wrap->state_ = kClosed;
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  wrap->OnClose();
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  wrap->handle_wrap_queue_.Remove();
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  if (!wrap->persistent().IsEmpty() &&
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      wrap->object()->Has(env->context(), env->handle_onclose_symbol())
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      .FromMaybe(false)) {
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    wrap->MakeCallback(env->handle_onclose_symbol(), 0, nullptr);
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  }
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}
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Local<FunctionTemplate> HandleWrap::GetConstructorTemplate(Environment* env) {
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  Local<FunctionTemplate> tmpl = env->handle_wrap_ctor_template();
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  if (tmpl.IsEmpty()) {
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    tmpl = env->NewFunctionTemplate(nullptr);
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    tmpl->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "HandleWrap"));
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    tmpl->Inherit(AsyncWrap::GetConstructorTemplate(env));
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    env->SetProtoMethod(tmpl, "close", HandleWrap::Close);
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    env->SetProtoMethodNoSideEffect(tmpl, "hasRef", HandleWrap::HasRef);
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    env->SetProtoMethod(tmpl, "ref", HandleWrap::Ref);
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    env->SetProtoMethod(tmpl, "unref", HandleWrap::Unref);
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    env->set_handle_wrap_ctor_template(tmpl);
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  }
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  return tmpl;
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}
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void HandleWrap::RegisterExternalReferences(
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    ExternalReferenceRegistry* registry) {
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  registry->Register(HandleWrap::Close);
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  registry->Register(HandleWrap::HasRef);
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  registry->Register(HandleWrap::Ref);
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  registry->Register(HandleWrap::Unref);
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}
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}  // namespace node
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NODE_MODULE_EXTERNAL_REFERENCE(handle_wrap,
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                               node::HandleWrap::RegisterExternalReferences)