1 files changed, 116 insertions, 0 deletions
diff --git a/media/gmp-clearkey/0.1/RefCounted.h b/media/gmp-clearkey/0.1/RefCounted.h
new file mode 100644
index 000000000..6da694295
--- /dev/null
+++ b/media/gmp-clearkey/0.1/RefCounted.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2015, Mozilla Foundation and contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __RefCount_h__
+#define __RefCount_h__
+
+#include <stdint.h>
+#include <assert.h>
+#include "ClearKeyUtils.h"
+
+#if defined(_MSC_VER)
+#include <atomic>
+typedef std::atomic<uint32_t> AtomicRefCount;
+#else
+class AtomicRefCount {
+public:
+  explicit AtomicRefCount(uint32_t aValue)
+    : mCount(aValue)
+    , mMutex(GMPCreateMutex())
+  {
+    assert(mMutex);
+  }
+  ~AtomicRefCount()
+  {
+    if (mMutex) {
+      mMutex->Destroy();
+    }
+  }
+  uint32_t operator--() {
+    AutoLock lock(mMutex);
+    return --mCount;
+  }
+  uint32_t operator++() {
+    AutoLock lock(mMutex);
+    return ++mCount;
+  }
+  operator uint32_t() {
+    AutoLock lock(mMutex);
+    return mCount;
+  }
+private:
+  uint32_t mCount;
+  GMPMutex* mMutex;
+};
+#endif
+
+// Note: Thread safe.
+class RefCounted {
+public:
+  void AddRef() {
+    ++mRefCount;
+  }
+
+  uint32_t Release() {
+    uint32_t newCount = --mRefCount;
+    if (!newCount) {
+      delete this;
+    }
+    return newCount;
+  }
+
+protected:
+  RefCounted()
+    : mRefCount(0)
+  {
+  }
+  virtual ~RefCounted()
+  {
+    assert(!mRefCount);
+  }
+  AtomicRefCount mRefCount;
+};
+
+template<class T>
+class RefPtr {
+public:
+  explicit RefPtr(T* aPtr) : mPtr(nullptr) {
+    Assign(aPtr);
+  }
+  ~RefPtr() {
+    Assign(nullptr);
+  }
+  T* operator->() const { return mPtr; }
+
+  RefPtr& operator=(T* aVal) {
+    Assign(aVal);
+    return *this;
+  }
+
+private:
+  void Assign(T* aPtr) {
+    if (mPtr) {
+      mPtr->Release();
+    }
+    mPtr = aPtr;
+    if (mPtr) {
+      aPtr->AddRef();
+    }
+  }
+  T* mPtr;
+};
+
+#endif // __RefCount_h__