1 files changed, 55 insertions, 0 deletions
diff --git a/dom/media/platforms/SimpleMap.h b/dom/media/platforms/SimpleMap.h
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+++ b/dom/media/platforms/SimpleMap.h
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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 mozilla_SimpleMap_h
+#define mozilla_SimpleMap_h
+
+#include "mozilla/Mutex.h"
+#include "nsTArray.h"
+
+#include <utility>
+
+namespace mozilla {
+
+template <typename T>
+class SimpleMap {
+ public:
+  typedef std::pair<int64_t, T> Element;
+
+  SimpleMap() : mMutex("SimpleMap") {}
+
+  // Insert Key and Value pair at the end of our map.
+  void Insert(int64_t aKey, const T& aValue) {
+    MutexAutoLock lock(mMutex);
+    mMap.AppendElement(std::make_pair(aKey, aValue));
+  }
+  // Sets aValue matching aKey and remove it from the map if found.
+  // The element returned is the first one found.
+  // Returns true if found, false otherwise.
+  bool Find(int64_t aKey, T& aValue) {
+    MutexAutoLock lock(mMutex);
+    for (uint32_t i = 0; i < mMap.Length(); i++) {
+      Element& element = mMap[i];
+      if (element.first == aKey) {
+        aValue = element.second;
+        mMap.RemoveElementAt(i);
+        return true;
+      }
+    }
+    return false;
+  }
+  // Remove all elements of the map.
+  void Clear() {
+    MutexAutoLock lock(mMutex);
+    mMap.Clear();
+  }
+
+ private:
+  Mutex mMutex MOZ_UNANNOTATED;  // To protect mMap.
+  AutoTArray<Element, 16> mMap;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_SimpleMap_h