ref

TinySTL/Detail/Ref.h

@@ -10,9 +10,12 @@ namespace TinySTL{
 			std::atomic<size_t> ncount_;
 			T *data_;
 			
-			explicit ref_t(size_t n = 0, T *p = nullptr) :ncount_(n), data_(p){}
+			explicit ref_t(T *p = nullptr): ncount_(0), data_(p){
-			ref_t(const ref_t&) = default;
+				if (data_)
-			ref_t& operator = (const ref_t&) = default;
+					ncount_ = 1;
+			}
+			ref_t(const ref_t&) = delete;
+			ref_t& operator = (const ref_t&) = delete;
 
 			size_t count()const{ return ncount_.load(); }
 			T *get_data()const{ return data_; }
@@ -36,6 +39,14 @@ namespace TinySTL{
 				return t;
 			}
 		};
+		template<class T>
+		bool operator ==(const ref_t<T>& lhs, const ref_t<T>& rhs){
+			return lhs.get_data() == rhs.get_data();
+		}
+		template<class T>
+		bool operator !=(const ref_t<T>& lhs, const ref_t<T>& rhs){
+			return !(lhs == rhs);
+		}
 	}
 }
 

TinySTL/Test/RefTest.cpp

@@ -0,0 +1,26 @@
+#include "RefTest.h"
+
+namespace TinySTL{
+	namespace RefTest{
+		void testCaseRef(){
+			ref_t<int> r1;
+			assert(r1.count() == 0);
+			assert(r1.get_data() == nullptr);
+
+			int n = 0;
+			ref_t<int> r2(&n);
+			assert(r2.count() == 1);
+			assert(r2.get_data() != nullptr);
+
+			++r2;
+			assert(r2.count() == 2);
+
+			--r2;
+			assert(r2.count() == 1);
+		}
+
+		void testAllCases(){
+			testCaseRef();
+		}
+	}
+}

TinySTL/Test/RefTest.h

@@ -0,0 +1,18 @@
+#ifndef _REF_TEST_H_
+#define _REF_TEST_H_
+
+#include "../Detail/Ref.h"
+
+#include <cassert>
+
+namespace TinySTL{
+	namespace RefTest{
+		template<class T>
+		using ref_t = TinySTL::Detail::ref_t < T > ;
+
+		void testCaseRef();
+		void testAllCases();
+	}
+}
+
+#endif

TinySTL/TinySTL.vcxproj

@@ -96,6 +96,7 @@
     <ClCompile Include="Test\PairTest.cpp" />
     <ClCompile Include="Test\PriorityQueueTest.cpp" />
     <ClCompile Include="Test\QueueTest.cpp" />
+    <ClCompile Include="Test\RefTest.cpp" />
     <ClCompile Include="Test\StackTest.cpp" />
     <ClCompile Include="Test\StringTest.cpp" />
     <ClCompile Include="Test\SuffixArrayTest.cpp" />
@@ -146,6 +147,7 @@
     <ClInclude Include="Test\PairTest.h" />
     <ClInclude Include="Test\PriorityQueueTest.h" />
     <ClInclude Include="Test\QueueTest.h" />
+    <ClInclude Include="Test\RefTest.h" />
     <ClInclude Include="Test\StackTest.h" />
     <ClInclude Include="Test\StringTest.h" />
     <ClInclude Include="Test\SuffixArrayTest.h" />

TinySTL/TinySTL.vcxproj.filters

@@ -99,6 +99,9 @@
     <ClCompile Include="Test\UniquePtrTest.cpp">
       <Filter>Test</Filter>
     </ClCompile>
+    <ClCompile Include="Test\RefTest.cpp">
+      <Filter>Test</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="TypeTraits.h">
@@ -266,6 +269,9 @@
     <ClInclude Include="Detail\Ref.h">
       <Filter>Detail</Filter>
     </ClInclude>
+    <ClInclude Include="Test\RefTest.h">
+      <Filter>Test</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\README.md" />

TinySTL/main.cpp

@@ -14,6 +14,7 @@
 #include "Test\PairTest.h"
 #include "Test\PriorityQueueTest.h"
 #include "Test\QueueTest.h"
+#include "Test\RefTest.h"
 #include "Test\StackTest.h"
 #include "Test\StringTest.h"
 #include "Test\SuffixArrayTest.h"
@@ -36,6 +37,7 @@ int main(){
 	TinySTL::PairTest::testAllCases();
 	TinySTL::PriorityQueueTest::testAllCases();
 	TinySTL::QueueTest::testAllCases();
+	TinySTL::RefTest::testAllCases();
 	TinySTL::StackTest::testAllCases();
 	TinySTL::StringTest::testAllCases();
 	TinySTL::SuffixArrayTest::testAllCases();