--- linuxsampler/trunk/src/engines/sfz/sfz.h	2022/01/03 15:10:25	4015
+++ linuxsampler/trunk/src/engines/sfz/sfz.h	2022/01/03 15:36:02	4016
@@ -702,6 +702,23 @@
         /// Returns a pointer to the instrument object
         Instrument* GetInstrument();
 
+        /// Returns true if file was modified since last call
+        bool checkFileModified(std::string filename = "");
+
+    protected:
+        struct Time {
+            intmax_t sec;
+            uint32_t nsec;
+
+            bool operator==(const Time& o) const {
+                return sec == o.sec && nsec == o.nsec;
+            }
+
+            bool operator!=(const Time& o) const {
+                return !(*this == o);
+            }
+        };
+
     private:
         void  push_header(std::string token);
         void  push_opcode(std::string token);
@@ -737,6 +754,11 @@
         std::string default_path;
         int octave_offset;
         int note_offset;
+
+        /// to detect when files were modified (e.g. by some external app)
+        std::map<std::string,Time> mod_times;
+
+        static optional<File::Time> getModTimeOfFile(std::string filename);
     };
 
 } // !namespace sfz