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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef nsDOMStorageIPC_h___
#define nsDOMStorageIPC_h___
#include "mozilla/dom/PStorageChild.h"
#include "mozilla/dom/PStorageParent.h"
#include "DOMStorageDBThread.h"
#include "DOMStorageCache.h"
#include "DOMStorageObserver.h"
#include "mozilla/Mutex.h"
#include "nsAutoPtr.h"
namespace mozilla {
class OriginAttributesPattern;
namespace dom {
class DOMLocalStorageManager;
// Child side of the IPC protocol, exposes as DB interface but
// is responsible to send all requests to the parent process
// and expects asynchronous answers. Those are then transparently
// forwarded back to consumers on the child process.
class DOMStorageDBChild final : public DOMStorageDBBridge
, public PStorageChild
{
virtual ~DOMStorageDBChild();
public:
explicit DOMStorageDBChild(DOMLocalStorageManager* aManager);
NS_IMETHOD_(MozExternalRefCountType) AddRef(void);
NS_IMETHOD_(MozExternalRefCountType) Release(void);
void AddIPDLReference();
void ReleaseIPDLReference();
virtual nsresult Init();
virtual nsresult Shutdown();
virtual void AsyncPreload(DOMStorageCacheBridge* aCache, bool aPriority = false);
virtual void AsyncGetUsage(DOMStorageUsageBridge* aUsage);
virtual void SyncPreload(DOMStorageCacheBridge* aCache, bool aForceSync = false);
virtual nsresult AsyncAddItem(DOMStorageCacheBridge* aCache, const nsAString& aKey, const nsAString& aValue);
virtual nsresult AsyncUpdateItem(DOMStorageCacheBridge* aCache, const nsAString& aKey, const nsAString& aValue);
virtual nsresult AsyncRemoveItem(DOMStorageCacheBridge* aCache, const nsAString& aKey);
virtual nsresult AsyncClear(DOMStorageCacheBridge* aCache);
virtual void AsyncClearAll()
{
if (mOriginsHavingData) {
mOriginsHavingData->Clear(); /* NO-OP on the child process otherwise */
}
}
virtual void AsyncClearMatchingOrigin(const nsACString& aOriginNoSuffix)
{ /* NO-OP on the child process */ }
virtual void AsyncClearMatchingOriginAttributes(const OriginAttributesPattern& aPattern)
{ /* NO-OP on the child process */ }
virtual void AsyncFlush()
{ SendAsyncFlush(); }
virtual bool ShouldPreloadOrigin(const nsACString& aOriginNoSuffix);
virtual void GetOriginsHavingData(InfallibleTArray<nsCString>* aOrigins)
{ NS_NOTREACHED("Not implemented for child process"); }
private:
bool RecvObserve(const nsCString& aTopic,
const nsString& aOriginAttributesPattern,
const nsCString& aOriginScope);
bool RecvLoadItem(const nsCString& aOriginSuffix,
const nsCString& aOriginNoSuffix,
const nsString& aKey,
const nsString& aValue);
bool RecvLoadDone(const nsCString& aOriginSuffix,
const nsCString& aOriginNoSuffix,
const nsresult& aRv);
bool RecvOriginsHavingData(nsTArray<nsCString>&& aOrigins);
bool RecvLoadUsage(const nsCString& aOriginNoSuffix,
const int64_t& aUsage);
bool RecvError(const nsresult& aRv);
nsTHashtable<nsCStringHashKey>& OriginsHavingData();
ThreadSafeAutoRefCnt mRefCnt;
NS_DECL_OWNINGTHREAD
// Held to get caches to forward answers to.
RefPtr<DOMLocalStorageManager> mManager;
// Origins having data hash, for optimization purposes only
nsAutoPtr<nsTHashtable<nsCStringHashKey>> mOriginsHavingData;
// List of caches waiting for preload. This ensures the contract that
// AsyncPreload call references the cache for time of the preload.
nsTHashtable<nsRefPtrHashKey<DOMStorageCacheBridge>> mLoadingCaches;
// Status of the remote database
nsresult mStatus;
bool mIPCOpen;
};
// Receives async requests from child processes and is responsible
// to send back responses from the DB thread. Exposes as a fake
// DOMStorageCache consumer.
// Also responsible for forwardning all chrome operation notifications
// such as cookie cleaning etc to the child process.
class DOMStorageDBParent final : public PStorageParent
, public DOMStorageObserverSink
{
virtual ~DOMStorageDBParent();
public:
DOMStorageDBParent();
NS_IMETHOD_(MozExternalRefCountType) AddRef(void);
NS_IMETHOD_(MozExternalRefCountType) Release(void);
void AddIPDLReference();
void ReleaseIPDLReference();
bool IPCOpen() { return mIPCOpen; }
public:
// Fake cache class receiving async callbacks from DB thread, sending
// them back to appropriate cache object on the child process.
class CacheParentBridge : public DOMStorageCacheBridge {
public:
CacheParentBridge(DOMStorageDBParent* aParentDB,
const nsACString& aOriginSuffix,
const nsACString& aOriginNoSuffix)
: mParent(aParentDB)
, mOriginSuffix(aOriginSuffix), mOriginNoSuffix(aOriginNoSuffix)
, mLoaded(false), mLoadedCount(0) {}
virtual ~CacheParentBridge() {}
// DOMStorageCacheBridge
virtual const nsCString Origin() const;
virtual const nsCString& OriginNoSuffix() const
{ return mOriginNoSuffix; }
virtual const nsCString& OriginSuffix() const
{ return mOriginSuffix; }
virtual bool Loaded()
{ return mLoaded; }
virtual uint32_t LoadedCount()
{ return mLoadedCount; }
virtual bool LoadItem(const nsAString& aKey, const nsString& aValue);
virtual void LoadDone(nsresult aRv);
virtual void LoadWait();
private:
RefPtr<DOMStorageDBParent> mParent;
nsCString mOriginSuffix, mOriginNoSuffix;
bool mLoaded;
uint32_t mLoadedCount;
};
// Fake usage class receiving async callbacks from DB thread
class UsageParentBridge : public DOMStorageUsageBridge
{
public:
UsageParentBridge(DOMStorageDBParent* aParentDB, const nsACString& aOriginScope)
: mParent(aParentDB), mOriginScope(aOriginScope) {}
virtual ~UsageParentBridge() {}
// DOMStorageUsageBridge
virtual const nsCString& OriginScope() { return mOriginScope; }
virtual void LoadUsage(const int64_t usage);
private:
RefPtr<DOMStorageDBParent> mParent;
nsCString mOriginScope;
};
private:
// IPC
virtual void ActorDestroy(ActorDestroyReason aWhy) override;
bool RecvAsyncPreload(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const bool& aPriority) override;
bool RecvPreload(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const uint32_t& aAlreadyLoadedCount,
InfallibleTArray<nsString>* aKeys, InfallibleTArray<nsString>* aValues,
nsresult* aRv) override;
bool RecvAsyncGetUsage(const nsCString& aOriginNoSuffix) override;
bool RecvAsyncAddItem(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const nsString& aKey, const nsString& aValue) override;
bool RecvAsyncUpdateItem(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const nsString& aKey, const nsString& aValue) override;
bool RecvAsyncRemoveItem(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const nsString& aKey) override;
bool RecvAsyncClear(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix) override;
bool RecvAsyncFlush() override;
// DOMStorageObserverSink
virtual nsresult Observe(const char* aTopic, const nsAString& aOriginAttrPattern, const nsACString& aOriginScope) override;
private:
CacheParentBridge* NewCache(const nsACString& aOriginSuffix, const nsACString& aOriginNoSuffix);
ThreadSafeAutoRefCnt mRefCnt;
NS_DECL_OWNINGTHREAD
// True when IPC channel is open and Send*() methods are OK to use.
bool mIPCOpen;
};
} // namespace dom
} // namespace mozilla
#endif
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