1 files changed, 48 insertions, 0 deletions
diff --git a/ppapi/cpp/non_thread_safe_ref_count.h b/ppapi/cpp/non_thread_safe_ref_count.h
new file mode 100644
index 0000000..d827209
--- /dev/null
+++ b/ppapi/cpp/non_thread_safe_ref_count.h
@@ -0,0 +1,48 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_CPP_NON_THREAD_SAFE_REF_COUNT_H_
+#define PPAPI_CPP_NON_THREAD_SAFE_REF_COUNT_H_
+
+#include "ppapi/cpp/core.h"
+#include "ppapi/cpp/logging.h"
+#include "ppapi/cpp/module.h"
+
+namespace pp {
+
+// Simple ref-count that isn't thread safe. Note: in Debug mode, it checks that
+// it is either called on the main thread, or always called on another thread.
+class NonThreadSafeRefCount {
+ public:
+  NonThreadSafeRefCount()
+      : ref_(0) {
+#ifndef NDEBUG
+    is_main_thread_ = Module::Get()->core()->IsMainThread();
+#endif
+  }
+
+  ~NonThreadSafeRefCount() {
+    PP_DCHECK(is_main_thread_ == Module::Get()->core()->IsMainThread());
+  }
+
+  int32_t AddRef() {
+    PP_DCHECK(is_main_thread_ == Module::Get()->core()->IsMainThread());
+    return ++ref_;
+  }
+
+  int32_t Release() {
+    PP_DCHECK(is_main_thread_ == Module::Get()->core()->IsMainThread());
+    return --ref_;
+  }
+
+ private:
+  int32_t ref_;
+#ifndef NDEBUG
+  bool is_main_thread_;
+#endif
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_NON_THREAD_SAFE_REF_COUNT_H_