[Server] Add GetMillisecondsSinceServerStart() server function

apps/openmw-mp/Script/Functions/Server.cpp

@@ -11,6 +11,7 @@
 #include <Script/Script.hpp>
 
 static std::string tempFilename;
+static std::chrono::high_resolution_clock::time_point startupTime = std::chrono::high_resolution_clock::now();
 
 void ServerFunctions::LogMessage(unsigned short level, const char *message) noexcept
 {
@@ -74,6 +75,13 @@ const char* ServerFunctions::GetDataPath() noexcept
     return Script::GetModDir();
 }
 
+unsigned int ServerFunctions::GetMillisecondsSinceServerStart() noexcept
+{
+    std::chrono::high_resolution_clock::time_point currentTime = std::chrono::high_resolution_clock::now();
+    std::chrono::milliseconds milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(currentTime - startupTime);
+    return milliseconds.count();
+}
+
 const char *ServerFunctions::GetOperatingSystemType() noexcept
 {
     return Utils::getOperatingSystemType().c_str();

apps/openmw-mp/Script/Functions/Server.hpp

@@ -16,6 +16,7 @@
     {"DoesFilePathExist",               ServerFunctions::DoesFilePathExist},\
     {"GetCaseInsensitiveFilename",      ServerFunctions::GetCaseInsensitiveFilename},\
     {"GetDataPath",                     ServerFunctions::GetDataPath},\
+    {"GetMillisecondsSinceServerStart", ServerFunctions::GetMillisecondsSinceServerStart},\
     {"GetOperatingSystemType",          ServerFunctions::GetOperatingSystemType},\
     {"GetArchitectureType",             ServerFunctions::GetArchitectureType},\
     {"GetServerVersion",                ServerFunctions::GetServerVersion},\
@@ -130,6 +131,13 @@ public:
     */
     static const char *GetDataPath() noexcept;
 
+    /**
+    * \brief Get the milliseconds elapsed since the server was started.
+    *
+    * \return The time since the server's startup in milliseconds.
+    */
+    static unsigned int GetMillisecondsSinceServerStart() noexcept;
+
     /**
     * \brief Get the type of the operating system used by the server.
     *