56 lines
2 KiB
C++
56 lines
2 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
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// Copyright (c) 2012 Intel Corp. All rights reserved.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/common/api/object_life_monitor.h"
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#include "base/bind.h"
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#include "base/message_loop/message_loop.h"
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namespace atom {
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// static
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void ObjectLifeMonitor::BindTo(v8::Isolate* isolate,
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v8::Local<v8::Object> target,
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v8::Local<v8::Function> destructor) {
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new ObjectLifeMonitor(isolate, target, destructor);
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}
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ObjectLifeMonitor::ObjectLifeMonitor(v8::Isolate* isolate,
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v8::Local<v8::Object> target,
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v8::Local<v8::Function> destructor)
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: isolate_(isolate),
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context_(isolate, isolate->GetCurrentContext()),
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target_(isolate, target),
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destructor_(isolate, destructor),
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weak_ptr_factory_(this) {
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target_.SetWeak(this, OnObjectGC, v8::WeakCallbackType::kParameter);
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}
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// static
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void ObjectLifeMonitor::OnObjectGC(
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const v8::WeakCallbackInfo<ObjectLifeMonitor>& data) {
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// Usually FirstWeakCallback should do nothing other than reset |object_|
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// and then set a second weak callback to run later. We can sidestep that,
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// because posting a task to the current message loop is all but free - but
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// DO NOT add any more work to this method. The only acceptable place to add
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// code is RunCallback.
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ObjectLifeMonitor* self = data.GetParameter();
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self->target_.Reset();
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base::MessageLoop::current()->PostTask(
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FROM_HERE, base::Bind(&ObjectLifeMonitor::RunCallback,
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self->weak_ptr_factory_.GetWeakPtr()));
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}
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void ObjectLifeMonitor::RunCallback() {
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v8::HandleScope handle_scope(isolate_);
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v8::Local<v8::Context> context = v8::Local<v8::Context>::New(
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isolate_, context_);
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v8::Context::Scope context_scope(context);
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v8::Local<v8::Function>::New(isolate_, destructor_)->Call(
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context->Global(), 0, nullptr);
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delete this;
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}
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} // namespace atom
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