Exporting symbols for consumers of the dll - and deleted old code

PiperOrigin-RevId: 401098019

cpp/core/strategy.h

@@ -11,40 +11,52 @@
 // 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 CORE_STRATEGY_H_
 #define CORE_STRATEGY_H_
 
 #include <string>
 
+#ifdef _WIN32  // These storage class specifiers only matter to win32 dll
+               // builds.
+#ifdef CORE_ADAPTER_DLL
+#define DLL_API \
+  __declspec(dllexport)  // If we're building the core, we're exporting.
+#else                    // !CORE_ADAPTER_DLL
+#define DLL_API \
+  __declspec(dllimport)  // If we're not building the core, we're importing.
+#endif                   // CORE_ADAPTER_DLL
+#else                    // !_WIN32
+#define DLL_API  // We're not building a win32 dll, leave the source unchanged.
+#endif           // _WIN32
+
 namespace location {
 namespace nearby {
 namespace connections {
 
 // Defines a copyable, comparable connection strategy type.
 // It is one of: kP2pCluster, kP2pStar, kP2pPointToPoint.
-class Strategy {
+class DLL_API Strategy {
  public:
   static const Strategy kNone;
   static const Strategy kP2pCluster;
   static const Strategy kP2pStar;
   static const Strategy kP2pPointToPoint;
-
   constexpr Strategy() : Strategy(kNone) {}
-
   constexpr Strategy(const Strategy&) = default;
   constexpr Strategy& operator=(const Strategy&) = default;
 
   // Returns true, if strategy is kNone, false otherwise.
   bool IsNone() const;
+
   // Returns true, if a strategy is one of the supported strategies,
   // false otherwise.
   bool IsValid() const;
+
   // Returns a string representing given strategy, for every valid strategy.
   std::string GetName() const;
+
   // Undefine strategy.
   void Clear() { *this = kNone; }
-
   friend bool operator==(const Strategy& lhs, const Strategy& rhs);
   friend bool operator!=(const Strategy& lhs, const Strategy& rhs);
 
@@ -61,7 +73,6 @@ class Strategy {
   };
   constexpr Strategy(ConnectionType connection_type, TopologyType topology_type)
       : connection_type_(connection_type), topology_type_(topology_type) {}
-
   ConnectionType connection_type_;
   TopologyType topology_type_;
 };
@@ -69,5 +80,4 @@ class Strategy {
 }  // namespace connections
 }  // namespace nearby
 }  // namespace location
-
 #endif  // CORE_STRATEGY_H_