gecko/dom/cache/ManagerId.cpp

85 lines
2.6 KiB
C++

/* -*- 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/cache/ManagerId.h"
#include "nsIPrincipal.h"
#include "nsProxyRelease.h"
#include "mozilla/nsRefPtr.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace dom {
namespace cache {
// static
nsresult
ManagerId::Create(nsIPrincipal* aPrincipal, ManagerId** aManagerIdOut)
{
MOZ_ASSERT(NS_IsMainThread());
// The QuotaManager::GetInfoFromPrincipal() has special logic for system
// and about: principals. We currently don't need the system principal logic
// because ManagerId only uses the origin for in memory comparisons. We
// also don't do any special logic to host the same Cache for different about:
// pages, so we don't need those checks either.
//
// But, if we get the same QuotaManager directory for different about:
// origins, we probably only want one Manager instance. So, we might
// want to start using the QM's concept of origin uniqueness here.
//
// TODO: consider using QuotaManager's modified origin here (bug 1112071)
nsCString origin;
nsresult rv = aPrincipal->GetOriginNoSuffix(origin);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
nsCString jarPrefix;
rv = aPrincipal->GetJarPrefix(jarPrefix);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
nsRefPtr<ManagerId> ref = new ManagerId(aPrincipal, origin, jarPrefix);
ref.forget(aManagerIdOut);
return NS_OK;
}
already_AddRefed<nsIPrincipal>
ManagerId::Principal() const
{
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIPrincipal> ref = mPrincipal;
return ref.forget();
}
ManagerId::ManagerId(nsIPrincipal* aPrincipal, const nsACString& aOrigin,
const nsACString& aJarPrefix)
: mPrincipal(aPrincipal)
, mExtendedOrigin(aJarPrefix + aOrigin)
{
MOZ_ASSERT(mPrincipal);
}
ManagerId::~ManagerId()
{
// If we're already on the main thread, then default destruction is fine
if (NS_IsMainThread()) {
return;
}
// Otherwise we need to proxy to main thread to do the release
// The PBackground worker thread shouldn't be running after the main thread
// is stopped. So main thread is guaranteed to exist here.
nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
MOZ_ASSERT(mainThread);
NS_ProxyRelease(mainThread, mPrincipal.forget().take());
}
} // namespace cache
} // namespace dom
} // namespace mozilla