Move `S_I*` constants and `MSG_NOSIGNAL` to compat.h

src/compat.h

@@ -59,6 +59,20 @@ typedef u_int SOCKET;
 #define SOCKET_ERROR        -1
 #endif
 
+#ifdef WIN32
+#ifndef S_IRUSR
+#define S_IRUSR             0400
+#define S_IWUSR             0200
+#endif
+#else
+#define MAX_PATH            1024
+#endif
+
+// As Solaris does not have the MSG_NOSIGNAL flag for send(2) syscall, it is defined as 0
+#if !defined(HAVE_MSG_NOSIGNAL) && !defined(MSG_NOSIGNAL)
+#define MSG_NOSIGNAL 0
+#endif
+
 #ifndef WIN32
 // PRIO_MAX is not defined on Solaris
 #ifndef PRIO_MAX

src/util.h

@@ -46,20 +46,6 @@ static const int64_t CENT = 1000000;
 // This is needed because the foreach macro can't get over the comma in pair<t1, t2>
 #define PAIRTYPE(t1, t2)    std::pair<t1, t2>
 
-#ifdef WIN32
-#define MSG_DONTWAIT        0
-
-#ifndef S_IRUSR
-#define S_IRUSR             0400
-#define S_IWUSR             0200
-#endif
-#else
-#define MAX_PATH            1024
-#endif
-// As Solaris does not have the MSG_NOSIGNAL flag for send(2) syscall, it is defined as 0
-#if !defined(HAVE_MSG_NOSIGNAL) && !defined(MSG_NOSIGNAL)
-#define MSG_NOSIGNAL 0
-#endif
 
 inline void MilliSleep(int64_t n)
 {