X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=unit.h;h=d3d4b0e9f629412ee0fe1c24ba86337391526fed;hp=4dc53a1a687ca6ab1425035b9515753a01967d0e;hb=9d58f1dbdb77be332731fb490d0d7f91a5718da8;hpb=41447faf1fc57463becabce399d983df762a104c

diff --git a/unit.h b/unit.h
index 4dc53a1a6..d3d4b0e9f 100644
--- a/unit.h
+++ b/unit.h
@@ -144,17 +144,6 @@ struct Meta {
          * the job for it */
         Job *job;
 
-        bool in_load_queue:1;
-        bool in_dbus_queue:1;
-        bool in_cleanup_queue:1;
-        bool sent_dbus_new_signal:1;
-
-        /* If we go down, pull down everything that depends on us, too */
-        bool recursive_stop;
-
-        /* Garbage collect us we nobody wants or requires us anymore */
-        bool stop_when_unneeded;
-
         usec_t active_enter_timestamp;
         usec_t active_exit_timestamp;
 
@@ -172,6 +161,17 @@ struct Meta {
 
         /* Cleanup queue */
         LIST_FIELDS(Meta, cleanup_queue);
+
+        /* If we go down, pull down everything that depends on us, too */
+        bool recursive_stop;
+
+        /* Garbage collect us we nobody wants or requires us anymore */
+        bool stop_when_unneeded;
+
+        bool in_load_queue:1;
+        bool in_dbus_queue:1;
+        bool in_cleanup_queue:1;
+        bool sent_dbus_new_signal:1;
 };
 
 #include "service.h"
@@ -198,35 +198,21 @@ union Unit {
 struct UnitVTable {
         const char *suffix;
 
-        /* Can units of this type have multiple names? */
-        bool no_alias:1;
-
-        /* If true units of this types can never have "Requires"
-         * dependencies, because state changes can only be observed,
-         * not triggered */
-        bool no_requires:1;
-
-        /* Instances make no sense for this type */
-        bool no_instances:1;
-
-        /* Execlude this type from snapshots */
-        bool no_snapshots:1;
-
         /* This should reset all type-specific variables. This should
-         * not allocate memory, and is either called with 0
-         * initialized data, or with data left from done() */
+         * not allocate memory, and is called with zero-initialized
+         * data. It should hence only initialize variables that need
+         * to be set != 0. */
         void (*init)(Unit *u);
 
+        /* This should free all type-specific variables. It should be
+         * idempotent. */
+        void (*done)(Unit *u);
+
         /* Actually load data from disk. This may fail, and should set
          * load_state to UNIT_LOADED, UNIT_MERGED or leave it at
          * UNIT_STUB if no configuration could be found. */
         int (*load)(Unit *u);
 
-        /* This should free all type-specific variables. It should be
-         * idempotent. There's no need to reset variables that deal
-         * with dynamic memory/resources. */
-        void (*done)(Unit *u);
-
         /* If a a lot of units got created via enumerate(), this is
          * where to actually set the state and call unit_notify(). */
         int (*coldplug)(Unit *u);
@@ -239,6 +225,13 @@ struct UnitVTable {
 
         bool (*can_reload)(Unit *u);
 
+        /* Write all data that cannot be restored from other sources
+         * away using unit_serialize_item() */
+        int (*serialize)(Unit *u, FILE *f, FDSet *fds);
+
+        /* Restore one item from the serialization */
+        int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
+
         /* Boils down the more complex internal state of this unit to
          * a simpler one that the engine can understand */
         UnitActiveState (*active_state)(Unit *u);
@@ -264,6 +257,9 @@ struct UnitVTable {
         /* Called whenever a bus PID lookup finishes */
         void (*bus_query_pid_done)(Unit *u, const char *name, pid_t pid);
 
+        /* Called for each message received on the bus */
+        DBusHandlerResult (*bus_message_handler)(Unit *u, DBusMessage *message);
+
         /* This is called for each unit type and should be used to
          * enumerate existing devices and load them. However,
          * everything that is loaded here should still stay in
@@ -273,6 +269,20 @@ struct UnitVTable {
 
         /* Type specific cleanups. */
         void (*shutdown)(Manager *m);
+
+        /* Can units of this type have multiple names? */
+        bool no_alias:1;
+
+        /* If true units of this types can never have "Requires"
+         * dependencies, because state changes can only be observed,
+         * not triggered */
+        bool no_requires:1;
+
+        /* Instances make no sense for this type */
+        bool no_instances:1;
+
+        /* Exclude this type from snapshots */
+        bool no_snapshots:1;
 };
 
 extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
@@ -330,6 +340,7 @@ Unit *unit_follow_merge(Unit *u);
 
 int unit_load_fragment_and_dropin(Unit *u);
 int unit_load_fragment_and_dropin_optional(Unit *u);
+int unit_load_nop(Unit *u);
 int unit_load(Unit *unit);
 
 const char *unit_description(Unit *u);
@@ -370,11 +381,18 @@ int set_unit_path(const char *p);
 char *unit_dbus_path(Unit *u);
 
 int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
+int unit_get_related_unit(Unit *u, const char *type, Unit **_found);
 
 char *unit_name_printf(Unit *u, const char* text);
 char *unit_full_printf(Unit *u, const char *text);
 char **unit_full_printf_strv(Unit *u, char **l);
 
+bool unit_can_serialize(Unit *u);
+int unit_serialize(Unit *u, FILE *f, FDSet *fds);
+void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_attr(4,5);
+void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
+int unit_deserialize(Unit *u, FILE *f, FDSet *fds);
+
 const char *unit_type_to_string(UnitType i);
 UnitType unit_type_from_string(const char *s);