Adds a modified copy of talk/base to webrtc/base. It is the first step in
migrating talk/base to webrtc/base.
BUG=N/A
R=niklas.enbom@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/17479005
git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@6129 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/base/refcount.h b/base/refcount.h
new file mode 100644
index 0000000..7bb6da3
--- /dev/null
+++ b/base/refcount.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2011 The WebRTC Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef TALK_APP_BASE_REFCOUNT_H_
+#define TALK_APP_BASE_REFCOUNT_H_
+
+#include <string.h>
+
+#include "webrtc/base/criticalsection.h"
+
+namespace rtc {
+
+// Reference count interface.
+class RefCountInterface {
+ public:
+ virtual int AddRef() = 0;
+ virtual int Release() = 0;
+ protected:
+ virtual ~RefCountInterface() {}
+};
+
+template <class T>
+class RefCountedObject : public T {
+ public:
+ RefCountedObject() : ref_count_(0) {
+ }
+
+ template<typename P>
+ explicit RefCountedObject(P p) : T(p), ref_count_(0) {
+ }
+
+ template<typename P1, typename P2>
+ RefCountedObject(P1 p1, P2 p2) : T(p1, p2), ref_count_(0) {
+ }
+
+ template<typename P1, typename P2, typename P3>
+ RefCountedObject(P1 p1, P2 p2, P3 p3) : T(p1, p2, p3), ref_count_(0) {
+ }
+
+ template<typename P1, typename P2, typename P3, typename P4>
+ RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4)
+ : T(p1, p2, p3, p4), ref_count_(0) {
+ }
+
+ template<typename P1, typename P2, typename P3, typename P4, typename P5>
+ RefCountedObject(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5)
+ : T(p1, p2, p3, p4, p5), ref_count_(0) {
+ }
+
+ virtual int AddRef() {
+ return rtc::AtomicOps::Increment(&ref_count_);
+ }
+
+ virtual int Release() {
+ int count = rtc::AtomicOps::Decrement(&ref_count_);
+ if (!count) {
+ delete this;
+ }
+ return count;
+ }
+
+ protected:
+ virtual ~RefCountedObject() {
+ }
+
+ int ref_count_;
+};
+
+} // namespace rtc
+
+#endif // TALK_APP_BASE_REFCOUNT_H_