Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/dom/JSOracleParent.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/PJSOracle.h"
#include "mozilla/ipc/Endpoint.h"
#include "mozilla/ipc/UtilityProcessManager.h"
using namespace mozilla;
using namespace mozilla::dom;
static StaticRefPtr<JSOracleParent> sOracleSingleton;
/* static */
void JSOracleParent::WithJSOracle(
const std::function<void(JSOracleParent* aParent)>& aCallback) {
GetSingleton()->StartJSOracle()->Then(
GetMainThreadSerialEventTarget(), __func__,
[aCallback](const JSOraclePromise::ResolveOrRejectValue& aResult) {
aCallback(aResult.IsReject() || !aResult.ResolveValue()
? nullptr
: GetSingleton());
});
}
void JSOracleParent::ActorDestroy(ActorDestroyReason aReason) {
// Given an actor can only be bound to one process,
// if the utility process crashes and we create a new one,
// we can't reuse the same JSOracleParent instance for it,
// so we always create a new JSOracleParent to replace
// the existing one.
if (aReason == ActorDestroyReason::AbnormalShutdown) {
sOracleSingleton = new JSOracleParent();
}
}
/* static */
JSOracleParent* JSOracleParent::GetSingleton() {
if (!sOracleSingleton) {
sOracleSingleton = new JSOracleParent();
ClearOnShutdown(&sOracleSingleton);
}
return sOracleSingleton;
}
RefPtr<JSOracleParent::JSOraclePromise> JSOracleParent::StartJSOracle() {
using namespace mozilla::ipc;
RefPtr<JSOracleParent> parent = JSOracleParent::GetSingleton();
return UtilityProcessManager::GetSingleton()->StartJSOracle(parent);
}
nsresult JSOracleParent::BindToUtilityProcess(
const RefPtr<mozilla::ipc::UtilityProcessParent>& aUtilityParent) {
Endpoint<PJSOracleParent> parentEnd;
Endpoint<PJSOracleChild> childEnd;
MOZ_ASSERT(aUtilityParent);
if (NS_FAILED(PJSOracle::CreateEndpoints(
mozilla::ipc::EndpointProcInfo::Current(),
aUtilityParent->OtherEndpointProcInfo(), &parentEnd, &childEnd))) {
return NS_ERROR_FAILURE;
}
if (!aUtilityParent->SendStartJSOracleService(std::move(childEnd))) {
return NS_ERROR_FAILURE;
}
Bind(std::move(parentEnd));
return NS_OK;
}
void JSOracleParent::Bind(Endpoint<PJSOracleParent>&& aEndpoint) {
DebugOnly<bool> ok = aEndpoint.Bind(this);
MOZ_ASSERT(ok);
}