Added COLD_BLOCK and HOT_BLOCK (for now), not sure if they work but they"re added.

Marked the error-handling routine of `_map_handle_err()` as `COLD_BLOCK`.

Fortune for naka's current commit: Future blessing − 末吉

include/macros.h

@@ -88,6 +88,11 @@
 		__attribute__((hot)); \
 		expr; \
 	})
+// Use like: COLD_BLOCK { ... }
+// XXX: I'm not exactly sure if these hacks work.. Should test.
+#define COLD_BLOCK if(UNLIKELY(1))
+// Use like: HOT_BLOCK { ... }
+#define HOT_BLOCK  if(LIKELY(1))
 
 /// Equivalent to GNU C `x ?: y` operator. 
 #define TERN_OR(x, y) ({ let _x = (x); _x ? _x : (y); })

include/map.h

@@ -53,7 +53,7 @@ const char* map_error_str(map_result_t res);
 _mixin int _map_handle_err(const char* stmt, const char* file, int line, const char* func, map_result_t res)
 {
 	if(res == MAP_SUCCESS) return 1;
-	else {
+	else COLD_BLOCK {
 		const char* err = map_error_str(res);
 		ERROR("mapping failed at %s:%d->%s(): on stmt `%s`", file, line, func, stmt);
 		switch(res) {