chg: Platform-aware handling of EAGAIN errors

src/net/connection_client.hpp

@@ -11,6 +11,12 @@
 #include <memory>
 #include <string>
 
+#if EAGAIN != EWOULDBLOCK
+    #define EAGAIN_WRAPPER ((errno != EAGAIN) && (errno != EWOULDBLOCK))
+#else
+    #define EAGAIN_WRAPPER (errno != EAGAIN)
+#endif
+
 namespace rmrf::net {
 
 template<class client>

src/net/tcp_client.cpp

@@ -226,7 +226,7 @@ void tcp_client::push_write_queue(::ev::io &w) {
 
     if (written >= 0) {
         buffer.advance((size_t)written);
-    } else if (errno != EAGAIN) {
+    } else if (EAGAIN_WRAPPER) {
         throw netio_exception("Failed to write latest buffer content.");
     }