added iOS source code

[wl-app.git] / iOS / Pods / Realm / include / core / realm / util / shared_ptr.hpp

diff --git a/iOS/Pods/Realm/include/core/realm/util/shared_ptr.hpp b/iOS/Pods/Realm/include/core/realm/util/shared_ptr.hpp
new file mode 100644 (file)
index 0000000..f89b24f
--- /dev/null
+++ b/iOS/Pods/Realm/include/core/realm/util/shared_ptr.hpp
@@ -0,0 +1,130 @@
+/*************************************************************************
+ *
+ * Copyright 2016 Realm Inc.
+ *
+ * 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 REALM_SHARED_PTR_HPP
+#define REALM_SHARED_PTR_HPP
+
+#include <cstdlib> // size_t
+
+namespace realm {
+namespace util {
+
+template <class T>
+class SharedPtr {
+public:
+    SharedPtr(T* p)
+    {
+        init(p);
+    }
+
+    SharedPtr()
+    {
+        init(0);
+    }
+
+    ~SharedPtr()
+    {
+        decref();
+    }
+
+    SharedPtr(const SharedPtr<T>& o)
+        : m_ptr(o.m_ptr)
+        , m_count(o.m_count)
+    {
+        incref();
+    }
+
+    SharedPtr<T>& operator=(const SharedPtr<T>& o)
+    {
+        if (m_ptr == o.m_ptr)
+            return *this;
+        decref();
+        m_ptr = o.m_ptr;
+        m_count = o.m_count;
+        incref();
+        return *this;
+    }
+
+    T* operator->() const
+    {
+        return m_ptr;
+    }
+
+    T& operator*() const
+    {
+        return *m_ptr;
+    }
+
+    T* get() const
+    {
+        return m_ptr;
+    }
+
+    bool operator==(const SharedPtr<T>& o) const
+    {
+        return m_ptr == o.m_ptr;
+    }
+
+    bool operator!=(const SharedPtr<T>& o) const
+    {
+        return m_ptr != o.m_ptr;
+    }
+
+    bool operator<(const SharedPtr<T>& o) const
+    {
+        return m_ptr < o.m_ptr;
+    }
+
+    size_t ref_count() const
+    {
+        return *m_count;
+    }
+
+private:
+    void init(T* p)
+    {
+        m_ptr = p;
+        try {
+            m_count = new size_t(1);
+        }
+        catch (...) {
+            delete p;
+            throw;
+        }
+    }
+
+    void decref()
+    {
+        if (--(*m_count) == 0) {
+            delete m_ptr;
+            delete m_count;
+        }
+    }
+
+    void incref()
+    {
+        ++(*m_count);
+    }
+
+    T* m_ptr;
+    size_t* m_count;
+};
+}
+}
+
+#endif