GMPStorageChild.h - mozsearch

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/* 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 GMPStorageChild_h_

#define GMPStorageChild_h_

#include "gmp-platform.h"

#include "gmp-storage.h"

#include "mozilla/Mutex.h"

#include "mozilla/RecursiveMutex.h"

#include "mozilla/gmp/PGMPStorageChild.h"

#include "nsRefPtrHashtable.h"

#include "nsTHashtable.h"

namespace mozilla::gmp {

class GMPChild;

class GMPStorageChild;

class GMPRecordImpl final : public GMPRecord {

 public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GMPRecordImpl)

  GMPRecordImpl(GMPStorageChild* aOwner, const nsCString& aName,

                GMPRecordClient* aClient);

  void DestroyOwner();

  // GMPRecord.

  GMPErr Open() override;

  GMPErr Read() override;

  GMPErr Write(const uint8_t* aData, uint32_t aDataSize) override;

  GMPErr Close() override;

  const nsCString& Name() const { return mName; }

  void OpenComplete(GMPErr aStatus);

  void ReadComplete(GMPErr aStatus, const uint8_t* aBytes, uint32_t aLength);

  void WriteComplete(GMPErr aStatus);

 private:

  RefPtr<GMPStorageChild> GetOwner();

  ~GMPRecordImpl() = default;

  RecursiveMutex mMutex{"GMPRecordImpl"};

  const nsCString mName;

  GMPRecordClient* mClient MOZ_GUARDED_BY(mMutex);

  GMPStorageChild* mOwner MOZ_GUARDED_BY(mMutex);

};

class GMPStorageChild final : public PGMPStorageChild {

  friend class PGMPStorageChild;

 public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GMPStorageChild)

  explicit GMPStorageChild(GMPChild* aPlugin);

  GMPErr CreateRecord(const nsCString& aRecordName, GMPRecord** aOutRecord,

                      GMPRecordClient* aClient);

  GMPErr Open(GMPRecordImpl* aRecord);

  GMPErr Read(GMPRecordImpl* aRecord);

  GMPErr Write(GMPRecordImpl* aRecord, const uint8_t* aData,

               uint32_t aDataSize);

  GMPErr Close(const nsCString& aRecordName);

  void ActorDestroy(ActorDestroyReason aWhy) override;

 private:

  bool HasRecord(const nsCString& aRecordName) MOZ_REQUIRES(mMutex);

  already_AddRefed<GMPRecordImpl> GetRecord(const nsCString& aRecordName);

 protected:

  ~GMPStorageChild() = default;

  // PGMPStorageChild

  mozilla::ipc::IPCResult RecvOpenComplete(const nsCString& aRecordName,

                                           const GMPErr& aStatus);

  mozilla::ipc::IPCResult RecvReadComplete(const nsCString& aRecordName,

                                           const GMPErr& aStatus,

                                           nsTArray<uint8_t>&& aBytes);

  mozilla::ipc::IPCResult RecvWriteComplete(const nsCString& aRecordName,

                                            const GMPErr& aStatus);

  mozilla::ipc::IPCResult RecvShutdown();

 private:

  Mutex mMutex{"GMPStorageChild"};

  nsRefPtrHashtable<nsCStringHashKey, GMPRecordImpl> mRecords

      MOZ_GUARDED_BY(mMutex);

  GMPChild* mPlugin;

  bool mShutdown MOZ_GUARDED_BY(mMutex) = false;

};

}  // namespace mozilla::gmp

#endif  // GMPStorageChild_h_