77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
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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 <string>
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#include "atom/common/api/object_life_monitor.h"
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#include "atom/common/node_includes.h"
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#include "native_mate/dictionary.h"
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#include "v8/include/v8-profiler.h"
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namespace {
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v8::Local<v8::Value> GetHiddenValue(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::String> key) {
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v8::Local<v8::Context> context = isolate->GetCurrentContext();
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v8::Local<v8::Private> privateKey = v8::Private::ForApi(isolate, key);
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v8::Local<v8::Value> value;
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v8::Maybe<bool> result = object->HasPrivate(context, privateKey);
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if (!(result.IsJust() && result.FromJust()))
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return v8::Local<v8::Value>();
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if (object->GetPrivate(context, privateKey).ToLocal(&value))
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return value;
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return v8::Local<v8::Value>();
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}
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void SetHiddenValue(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::String> key,
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v8::Local<v8::Value> value) {
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if (value.IsEmpty())
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return;
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v8::Local<v8::Context> context = isolate->GetCurrentContext();
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v8::Local<v8::Private> privateKey = v8::Private::ForApi(isolate, key);
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object->SetPrivate(context, privateKey, value);
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}
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void DeleteHiddenValue(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::String> key) {
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v8::Local<v8::Context> context = isolate->GetCurrentContext();
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v8::Local<v8::Private> privateKey = v8::Private::ForApi(isolate, key);
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// Actually deleting the value would make force the object into
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// dictionary mode which is unnecessarily slow. Instead, we replace
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// the hidden value with "undefined".
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object->SetPrivate(context, privateKey, v8::Undefined(isolate));
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}
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int32_t GetObjectHash(v8::Local<v8::Object> object) {
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return object->GetIdentityHash();
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}
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void SetDestructor(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::Function> callback) {
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atom::ObjectLifeMonitor::BindTo(isolate, object, callback);
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}
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void TakeHeapSnapshot(v8::Isolate* isolate) {
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isolate->GetHeapProfiler()->TakeHeapSnapshot();
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}
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void Initialize(v8::Local<v8::Object> exports, v8::Local<v8::Value> unused,
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v8::Local<v8::Context> context, void* priv) {
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mate::Dictionary dict(context->GetIsolate(), exports);
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dict.SetMethod("getHiddenValue", &GetHiddenValue);
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dict.SetMethod("setHiddenValue", &SetHiddenValue);
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dict.SetMethod("deleteHiddenValue", &DeleteHiddenValue);
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dict.SetMethod("getObjectHash", &GetObjectHash);
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dict.SetMethod("setDestructor", &SetDestructor);
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dict.SetMethod("takeHeapSnapshot", &TakeHeapSnapshot);
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}
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} // namespace
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NODE_MODULE_CONTEXT_AWARE_BUILTIN(atom_common_v8_util, Initialize)
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