add warning flags to cmake

CMakeLists.txt

@@ -5,6 +5,12 @@ set(CMAKE_CXX_STANDARD 14)
 
 add_executable(mock_key_value_store kv_store/src/main.cpp)
 
+if(MSVC)
+  target_compile_options(mock_key_value_store PRIVATE /W4)
+else()
+  target_compile_options(mock_key_value_store PRIVATE -Wall -Wextra -pedantic)
+endif()
+
 target_link_libraries(mock_key_value_store mock_kv_store)
 
 enable_testing()

kv_store/include/consistency_checker.h

@@ -24,6 +24,10 @@ namespace mockdb {
             this->store = store;
         }
 
+        virtual ~consistency_checker() {
+            // Pass
+        }
+
         virtual bool is_consistent(const transaction<K, V> *new_tx) = 0;
     protected:
         const kv_store<K, V> *store;
@@ -63,7 +67,7 @@ namespace mockdb {
                 return true;
 
             // Check if all dependent_txs are committed before tx_id
-            int committed_count = 0;
+            size_t committed_count = 0;
             for (auto tx : this->store->get_history()) {
                 if (dependent_txs.find(tx->get_tx_id()) != dependent_txs.end())
                     committed_count++;

kv_store/include/operation_param.h

@@ -13,9 +13,13 @@ namespace mockdb {
         virtual K get_key() const {
             return this->key;
         }
+
+        virtual ~operation_param() {
+            // Pass
+        }
+
     protected:
         K key;
-
     };
 
     template <typename K, typename V>

kv_store/include/operation_response.h

@@ -10,6 +10,10 @@ namespace mockdb {
     template <typename K, typename V>
     class operation_response {
     public:
+        virtual ~operation_response() {
+            // Pass
+        }
+
         virtual bool is_successful() {
             return success;
         }
@@ -34,8 +38,8 @@ namespace mockdb {
         long get_written_by_tx_id() const {
             return written_by_tx_id;
         }
-        void set_written_by_tx_id(long value) {
+        void set_written_by_tx_id(long tx_id) {
-            written_by_tx_id = value;
+            written_by_tx_id = tx_id;
         }
     private:
         const K key;

kv_store/include/read_response_selector.h

@@ -33,8 +33,8 @@ namespace mockdb {
         virtual void init_consistency_checker(const kv_store <K, V> *store) = 0;
 
         // By default it picks one transaction response at random
-        virtual GET_response<K, V> *select_read_response(transaction<K, V> *tx,
+        virtual GET_response<K, V> *select_read_response(transaction<K, V> *,
-                                                         GET_operation<K, V> *op,
+                                                         GET_operation<K, V> *,
                                                          std::vector<GET_response<K, V> *> candidates) {
             int idx = std::rand() % candidates.size();
             return candidates[idx];

kv_store/src/main.cpp

@@ -9,7 +9,7 @@
 
 #include <string>
 
-int main(int argc, char* argv[]) {
+int main() {
     mockdb::kv_store<std::string, int> *store;
     mockdb::read_response_selector<std::string, int> *get_next_tx;