Increase benchmark iterations to 100 and enhance flush method for Windows compatibility

cpp/src/Private/sweepstore/benchmark.cpp

@@ -35,7 +35,7 @@ int main() {
 
     SweepstoreConcurrency::initialiseMasterAsync(filePath);
 
-    int iterations = 1;
+    int iterations = 100;
     int currentIteration = 0;
 
     while (true) {

cpp/src/Private/sweepstore/utils/file_handle.cpp

@@ -55,6 +55,7 @@ void SweepstoreFileHandle::close() {
 #endif
 }
 
+#if defined(_WIN32) || defined(WITH_UNREAL)
 // flush
 void SweepstoreFileHandle::flush() {
 #ifdef WITH_UNREAL
@@ -64,15 +65,12 @@ void SweepstoreFileHandle::flush() {
 #else
     if (stream) {
         stream->flush();
-#ifdef _WIN32
         // On Windows, also sync to ensure data hits disk
         stream->sync();
-#endif
     }
 #endif
 }
 
-#if defined(_WIN32) || defined(WITH_UNREAL)
 // readSeek
 void SweepstoreFileHandle::readSeek(std::streampos pos, std::ios::seekdir dir) {
 #ifdef WITH_UNREAL

cpp/src/Public/sweepstore/utils/file_handle.h

@@ -37,16 +37,21 @@ public:
 
     bool isOpen() const;
     void close();
-    void flush();
 
     // Windows-compatible I/O wrappers
 #if defined(_WIN32) || defined(WITH_UNREAL)
+    void flush();
     void readSeek(std::streampos pos, std::ios::seekdir dir = std::ios::beg);
     void writeSeek(std::streampos pos, std::ios::seekdir dir = std::ios::beg);
     void readBytes(char* buffer, std::streamsize size);
     void writeBytes(const char* buffer, std::streamsize size);
 #else
     // Inline for non-Windows to avoid overhead
+    inline void flush() {
+        if (stream) {
+            stream->flush();
+        }
+    }
     inline void readSeek(std::streampos pos, std::ios::seekdir dir = std::ios::beg) {
         stream->seekg(pos, dir);
     }