import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/media/systemservices/MediaSystemResourceClient.cpp

@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/Monitor.h"
+#include "mozilla/ReentrantMonitor.h"
+
+#include "MediaSystemResourceClient.h"
+
+namespace mozilla {
+
+Atomic<uint32_t> MediaSystemResourceClient::sSerialCounter(0);
+
+MediaSystemResourceClient::MediaSystemResourceClient(MediaSystemResourceType aReourceType)
+  : mResourceType(aReourceType)
+  , mId(++sSerialCounter)
+  , mListener(nullptr)
+  , mResourceState(RESOURCE_STATE_START)
+  , mIsSync(false)
+  , mAcquireSyncWaitMonitor(nullptr)
+  , mAcquireSyncWaitDone(nullptr)
+{
+  mManager = MediaSystemResourceManager::Get();
+  if (mManager) {
+    mManager->Register(this);
+  }
+}
+
+MediaSystemResourceClient::~MediaSystemResourceClient()
+{
+  ReleaseResource();
+  if (mManager) {
+    mManager->Unregister(this);
+  }
+}
+
+bool
+MediaSystemResourceClient::SetListener(MediaSystemResourceReservationListener* aListener)
+{
+  if (!mManager) {
+    return false;
+  }
+  return mManager->SetListener(this, aListener);
+}
+
+void
+MediaSystemResourceClient::Acquire()
+{
+  if (!mManager) {
+    return;
+  }
+  mManager->Acquire(this);
+}
+
+bool
+MediaSystemResourceClient::AcquireSyncNoWait()
+{
+  if (!mManager) {
+    return false;
+  }
+  return mManager->AcquireSyncNoWait(this);
+}
+
+void
+MediaSystemResourceClient::ReleaseResource()
+{
+  if (!mManager) {
+    return;
+  }
+  mManager->ReleaseResource(this);
+}
+
+} // namespace mozilla