add host latency

src/lib/ebus/device.cpp

@@ -75,7 +75,8 @@ namespace ebusd {
 
 Device::Device(const char* name, bool checkDevice, unsigned int latency, bool readOnly, bool initialSend,
     bool enhancedProto)
-  : m_name(name), m_checkDevice(checkDevice), m_latency(latency), m_readOnly(readOnly), m_initialSend(initialSend),
+  : m_name(name), m_checkDevice(checkDevice),
+    m_latency(HOST_LATENCY_MS+latency), m_readOnly(readOnly), m_initialSend(initialSend),
     m_enhancedProto(enhancedProto), m_fd(-1), m_listener(nullptr), m_arbitrationMaster(SYN),
     m_arbitrationCheck(false), m_bufSize(((MAX_LEN+1+3)/4)*4), m_bufLen(0), m_bufPos(0) {
   m_buffer = reinterpret_cast<symbol_t*>(malloc(m_bufSize));

src/lib/ebus/device.h

@@ -43,6 +43,13 @@ namespace ebusd {
 /** the transfer latency of the network device [ms]. */
 #define NETWORK_LATENCY_MS 10
 
+/** the latency of the host [ms]. */
+#ifdef __CYGWIN__
+#define HOST_LATENCY_MS 20
+#else
+#define HOST_LATENCY_MS 0
+#endif
+
 /** the arbitration state handled by @a Device. */
 enum ArbitrationState {
   as_none,    //!< no arbitration in process