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