diff options
Diffstat (limited to 'dom/media/gmp/GMPStorageChild.cpp')
| -rw-r--r-- | dom/media/gmp/GMPStorageChild.cpp | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/dom/media/gmp/GMPStorageChild.cpp b/dom/media/gmp/GMPStorageChild.cpp new file mode 100644 index 0000000000..b08356e0d6 --- /dev/null +++ b/dom/media/gmp/GMPStorageChild.cpp @@ -0,0 +1,244 @@ +/* -*- Mode: C++; tab-width: 2; 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/. */ + +#include "GMPStorageChild.h" +#include "GMPChild.h" +#include "gmp-storage.h" +#include "base/task.h" + +#define ON_GMP_THREAD() (mPlugin->GMPMessageLoop() == MessageLoop::current()) + +#define CALL_ON_GMP_THREAD(_func, ...) \ + do { \ + if (ON_GMP_THREAD()) { \ + _func(__VA_ARGS__); \ + } else { \ + mPlugin->GMPMessageLoop()->PostTask( \ + dont_add_new_uses_of_this::NewRunnableMethod( \ + this, &GMPStorageChild::_func, ##__VA_ARGS__)); \ + } \ + } while (false) + +namespace mozilla::gmp { + +static nsTArray<uint8_t> ToArray(const uint8_t* aData, uint32_t aDataSize) { + nsTArray<uint8_t> data; + data.AppendElements(aData, aDataSize); + return data; +} + +GMPRecordImpl::GMPRecordImpl(GMPStorageChild* aOwner, const nsCString& aName, + GMPRecordClient* aClient) + : mName(aName), mClient(aClient), mOwner(aOwner) {} + +GMPErr GMPRecordImpl::Open() { return mOwner->Open(this); } + +void GMPRecordImpl::OpenComplete(GMPErr aStatus) { + mClient->OpenComplete(aStatus); +} + +GMPErr GMPRecordImpl::Read() { return mOwner->Read(this); } + +void GMPRecordImpl::ReadComplete(GMPErr aStatus, const uint8_t* aBytes, + uint32_t aLength) { + mClient->ReadComplete(aStatus, aBytes, aLength); +} + +GMPErr GMPRecordImpl::Write(const uint8_t* aData, uint32_t aDataSize) { + return mOwner->Write(this, aData, aDataSize); +} + +void GMPRecordImpl::WriteComplete(GMPErr aStatus) { + mClient->WriteComplete(aStatus); +} + +GMPErr GMPRecordImpl::Close() { + RefPtr<GMPRecordImpl> kungfuDeathGrip(this); + // Delete our self reference. + Release(); + mOwner->Close(this->Name()); + return GMPNoErr; +} + +GMPStorageChild::GMPStorageChild(GMPChild* aPlugin) + : mMonitor("GMPStorageChild"), mPlugin(aPlugin), mShutdown(false) { + MOZ_ASSERT(ON_GMP_THREAD()); +} + +GMPErr GMPStorageChild::CreateRecord(const nsCString& aRecordName, + GMPRecord** aOutRecord, + GMPRecordClient* aClient) { + MonitorAutoLock lock(mMonitor); + + if (mShutdown) { + NS_WARNING("GMPStorage used after it's been shutdown!"); + return GMPClosedErr; + } + + MOZ_ASSERT(aRecordName.Length() && aOutRecord); + + if (HasRecord(aRecordName)) { + return GMPRecordInUse; + } + + RefPtr<GMPRecordImpl> record(new GMPRecordImpl(this, aRecordName, aClient)); + mRecords.InsertOrUpdate(aRecordName, RefPtr{record}); // Addrefs + + // The GMPRecord holds a self reference until the GMP calls Close() on + // it. This means the object is always valid (even if neutered) while + // the GMP expects it to be. + record.forget(aOutRecord); + + return GMPNoErr; +} + +bool GMPStorageChild::HasRecord(const nsCString& aRecordName) { + mMonitor.AssertCurrentThreadOwns(); + return mRecords.Contains(aRecordName); +} + +already_AddRefed<GMPRecordImpl> GMPStorageChild::GetRecord( + const nsCString& aRecordName) { + MonitorAutoLock lock(mMonitor); + RefPtr<GMPRecordImpl> record; + mRecords.Get(aRecordName, getter_AddRefs(record)); + return record.forget(); +} + +GMPErr GMPStorageChild::Open(GMPRecordImpl* aRecord) { + MonitorAutoLock lock(mMonitor); + + if (mShutdown) { + NS_WARNING("GMPStorage used after it's been shutdown!"); + return GMPClosedErr; + } + + if (!HasRecord(aRecord->Name())) { + // Trying to re-open a record that has already been closed. + return GMPClosedErr; + } + + CALL_ON_GMP_THREAD(SendOpen, aRecord->Name()); + + return GMPNoErr; +} + +GMPErr GMPStorageChild::Read(GMPRecordImpl* aRecord) { + MonitorAutoLock lock(mMonitor); + + if (mShutdown) { + NS_WARNING("GMPStorage used after it's been shutdown!"); + return GMPClosedErr; + } + + if (!HasRecord(aRecord->Name())) { + // Record not opened. + return GMPClosedErr; + } + + CALL_ON_GMP_THREAD(SendRead, aRecord->Name()); + + return GMPNoErr; +} + +GMPErr GMPStorageChild::Write(GMPRecordImpl* aRecord, const uint8_t* aData, + uint32_t aDataSize) { + if (aDataSize > GMP_MAX_RECORD_SIZE) { + return GMPQuotaExceededErr; + } + + MonitorAutoLock lock(mMonitor); + + if (mShutdown) { + NS_WARNING("GMPStorage used after it's been shutdown!"); + return GMPClosedErr; + } + + if (!HasRecord(aRecord->Name())) { + // Record not opened. + return GMPClosedErr; + } + + CALL_ON_GMP_THREAD(SendWrite, aRecord->Name(), ToArray(aData, aDataSize)); + + return GMPNoErr; +} + +GMPErr GMPStorageChild::Close(const nsCString& aRecordName) { + MonitorAutoLock lock(mMonitor); + + if (!HasRecord(aRecordName)) { + // Already closed. + return GMPClosedErr; + } + + mRecords.Remove(aRecordName); + + if (!mShutdown) { + CALL_ON_GMP_THREAD(SendClose, aRecordName); + } + + return GMPNoErr; +} + +mozilla::ipc::IPCResult GMPStorageChild::RecvOpenComplete( + const nsCString& aRecordName, const GMPErr& aStatus) { + // We don't need a lock to read |mShutdown| since it is only changed in + // the GMP thread. + if (mShutdown) { + return IPC_OK(); + } + RefPtr<GMPRecordImpl> record = GetRecord(aRecordName); + if (!record) { + // Not fatal. + return IPC_OK(); + } + record->OpenComplete(aStatus); + return IPC_OK(); +} + +mozilla::ipc::IPCResult GMPStorageChild::RecvReadComplete( + const nsCString& aRecordName, const GMPErr& aStatus, + nsTArray<uint8_t>&& aBytes) { + if (mShutdown) { + return IPC_OK(); + } + RefPtr<GMPRecordImpl> record = GetRecord(aRecordName); + if (!record) { + // Not fatal. + return IPC_OK(); + } + record->ReadComplete(aStatus, aBytes.Elements(), aBytes.Length()); + return IPC_OK(); +} + +mozilla::ipc::IPCResult GMPStorageChild::RecvWriteComplete( + const nsCString& aRecordName, const GMPErr& aStatus) { + if (mShutdown) { + return IPC_OK(); + } + RefPtr<GMPRecordImpl> record = GetRecord(aRecordName); + if (!record) { + // Not fatal. + return IPC_OK(); + } + record->WriteComplete(aStatus); + return IPC_OK(); +} + +mozilla::ipc::IPCResult GMPStorageChild::RecvShutdown() { + // Block any new storage requests, and thus any messages back to the + // parent. We don't delete any objects here, as that may invalidate + // GMPRecord pointers held by the GMP. + MonitorAutoLock lock(mMonitor); + mShutdown = true; + return IPC_OK(); +} + +} // namespace mozilla::gmp + +// avoid redefined macro in unified build +#undef ON_GMP_THREAD +#undef CALL_ON_GMP_THREAD |