core: simplify unit type detection logic

Introduce a new call unit_type_supported() and make use of it
everywhere.

Also, drop Manager parameter from per-type supported method prototype.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/core/unit.h b/src/core/unit.h
index 1a44271bc6..31b12157c2 100644
--- a/src/core/unit.h
+++ b/src/core/unit.h
@@ -402,7 +402,7 @@ struct UnitVTable {
 
         /* If this function is set and return false all jobs for units
          * of this type will immediately fail. */
-        bool (*supported)(Manager *m);
+        bool (*supported)(void);
 
         /* The interface name */
         const char *bus_interface;
@@ -601,6 +601,12 @@ int unit_make_transient(Unit *u);
 
 int unit_require_mounts_for(Unit *u, const char *path);
 
+bool unit_type_supported(UnitType t);
+
+static inline bool unit_supported(Unit *u) {
+        return unit_type_supported(u->type);
+}
+
 const char *unit_active_state_to_string(UnitActiveState i) _const_;
 UnitActiveState unit_active_state_from_string(const char *s) _pure_;