Make PopSirt inlinable, pass self to SirtRef.

Change-Id: Ieb91526b1cb1f8644ceb3c5b99649f658f43bbc1
diff --git a/src/sirt_ref.h b/src/sirt_ref.h
new file mode 100644
index 0000000..ea0b9a3
--- /dev/null
+++ b/src/sirt_ref.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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 ART_SRC_SIRT_REF_H_
+#define ART_SRC_SIRT_REF_H_
+
+#include "logging.h"
+#include "macros.h"
+#include "thread.h"
+
+namespace art {
+
+template<class T>
+class SirtRef {
+ public:
+  SirtRef(Thread* self, T* object) : self_(self), sirt_(object) {
+    self_->PushSirt(&sirt_);
+  }
+  ~SirtRef() {
+    CHECK(self_->PopSirt() == &sirt_);
+  }
+
+  T& operator*() const { return *get(); }
+  T* operator->() const { return get(); }
+  T* get() const {
+    return down_cast<T*>(sirt_.GetReference(0));
+  }
+
+  void reset(T* object = NULL) {
+    sirt_.SetReference(0, object);
+  }
+
+ private:
+  Thread* const self_;
+  StackIndirectReferenceTable sirt_;
+
+  DISALLOW_COPY_AND_ASSIGN(SirtRef);
+};
+
+}  // namespace art
+
+#endif  // ART_SRC_SIRT_REF_H_