jsc_protected.hpp
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////////////////////////////////////////////////////////////////////////////
//
// Copyright 2016 Realm Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////
#pragma once
#include "jsc_types.hpp"
namespace realm {
namespace js {
template<>
class Protected<JSGlobalContextRef> {
JSGlobalContextRef m_context;
public:
Protected() : m_context(nullptr) {}
Protected(const Protected<JSGlobalContextRef> &other) : Protected(other.m_context) {}
Protected(Protected<JSGlobalContextRef> &&other) : m_context(other.m_context) {
other.m_context = nullptr;
}
explicit Protected(JSGlobalContextRef ctx) : m_context(ctx) {
JSGlobalContextRetain(m_context);
}
~Protected() {
if (m_context) {
JSGlobalContextRelease(m_context);
}
}
operator JSGlobalContextRef() const {
return m_context;
}
operator bool() const {
return m_context != nullptr;
}
struct Comparator {
bool operator() (const Protected<JSGlobalContextRef>& a, const Protected<JSGlobalContextRef>& b) const {
return a.m_context == b.m_context;
}
};
};
template<>
class Protected<JSValueRef> {
protected:
JSGlobalContextRef m_context = nullptr;
JSValueRef m_value = nullptr;
public:
Protected() {}
Protected(const Protected<JSValueRef> &other) : Protected(other.m_context, other.m_value) {}
Protected(Protected<JSValueRef> &&other) : m_context(other.m_context), m_value(other.m_value) {
other.m_context = nullptr;
other.m_value = nullptr;
}
Protected(JSContextRef ctx, JSValueRef value) : m_context(JSContextGetGlobalContext(ctx)), m_value(value) {
JSValueProtect(m_context, m_value);
}
~Protected() {
if (m_value) {
JSValueUnprotect(m_context, m_value);
}
}
operator JSValueRef() const {
return m_value;
}
operator bool() const {
return m_value != nullptr;
}
struct Comparator {
bool operator() (const Protected<JSValueRef>& a, const Protected<JSValueRef>& b) const {
if (a.m_context != b.m_context) {
return false;
}
return JSValueIsStrictEqual(a.m_context, a.m_value, b.m_value);
}
};
Protected<JSValueRef>& operator=(Protected<JSValueRef> other) {
std::swap(m_context, other.m_context);
std::swap(m_value, other.m_value);
return *this;
}
};
template<>
class Protected<JSObjectRef> : public Protected<JSValueRef> {
public:
Protected() : Protected<JSValueRef>() {}
Protected(const Protected<JSObjectRef> &other) : Protected<JSValueRef>(other) {}
Protected(Protected<JSObjectRef> &&other) : Protected<JSValueRef>(std::move(other)) {}
Protected(JSContextRef ctx, JSObjectRef value) : Protected<JSValueRef>(ctx, value) {}
operator JSObjectRef() const {
JSValueRef value = static_cast<JSValueRef>(*this);
return (JSObjectRef)value;
}
Protected<JSObjectRef>& operator=(Protected<JSObjectRef> other) {
std::swap(m_context, other.m_context);
std::swap(m_value, other.m_value);
return *this;
}
};
} // js
} // realm