typedef struct Job Job;
typedef struct JobDependency JobDependency;
+typedef struct JobBusClient JobBusClient;
typedef enum JobType JobType;
typedef enum JobState JobState;
typedef enum JobMode JobMode;
typedef enum JobResult JobResult;
-#include "manager.h"
-#include "unit.h"
-#include "hashmap.h"
-#include "list.h"
-
/* Be careful when changing the job types! Adjust job_merging_table[] accordingly! */
enum JobType {
JOB_START, /* if a unit does not support being started, we'll just wait until it becomes active */
JOB_STOP,
- JOB_RELOAD, /* if running reload */
- JOB_RELOAD_OR_START, /* if running reload, if not running start */
+ JOB_RELOAD, /* if running, reload */
/* Note that restarts are first treated like JOB_STOP, but
* then instead of finishing are patched to become
* JOB_START. */
- JOB_RESTART, /* if running stop, then start unconditionally */
- JOB_TRY_RESTART, /* if running stop and then start */
+ JOB_RESTART, /* If running, stop. Then start unconditionally. */
+
+ _JOB_TYPE_MAX_MERGING,
+
+ /* JOB_NOP can enter into a transaction, but as it won't pull in
+ * any dependencies, it won't have to merge with anything.
+ * job_install() avoids the problem of merging JOB_NOP too (it's
+ * special-cased, only merges with other JOB_NOPs). */
+ JOB_NOP = _JOB_TYPE_MAX_MERGING, /* do nothing */
+
+ _JOB_TYPE_MAX_IN_TRANSACTION,
+
+ /* JOB_TRY_RESTART can never appear in a transaction, because
+ * it always collapses into JOB_RESTART or JOB_NOP before entering.
+ * Thus we never need to merge it with anything. */
+ JOB_TRY_RESTART = _JOB_TYPE_MAX_IN_TRANSACTION, /* if running, stop and then start */
+
+ /* JOB_RELOAD_OR_START won't enter into a transaction and cannot result
+ * from transaction merging (there's no way for JOB_RELOAD and
+ * JOB_START to meet in one transaction). It can result from a merge
+ * during job installation, but then it will immediately collapse into
+ * one of the two simpler types. */
+ JOB_RELOAD_OR_START, /* if running, reload, otherwise start */
_JOB_TYPE_MAX,
_JOB_TYPE_INVALID = -1
_JOB_RESULT_INVALID = -1
};
+#include "manager.h"
+#include "unit.h"
+#include "hashmap.h"
+#include "list.h"
+
struct JobDependency {
/* Encodes that the 'subject' job needs the 'object' job in
* some way. This structure is used only while building a transaction. */
bool conflicts;
};
+struct JobBusClient {
+ LIST_FIELDS(JobBusClient, client);
+ /* Note that this bus object is not ref counted here. */
+ DBusConnection *bus;
+ char name[0];
+};
+
struct Job {
Manager *manager;
Unit *unit;
Watch timer_watch;
- /* Note that this bus object is not ref counted here. */
- DBusConnection *bus;
- char *bus_client;
+ /* There can be more than one client, because of job merging. */
+ LIST_HEAD(JobBusClient, bus_client_list);
JobResult result;
bool in_dbus_queue:1;
bool sent_dbus_new_signal:1;
bool ignore_order:1;
+ bool forgot_bus_clients:1;
};
-Job* job_new(Manager *m, JobType type, Unit *unit);
+JobBusClient* job_bus_client_new(DBusConnection *connection, const char *name);
+
+Job* job_new(Unit *unit, JobType type);
+Job* job_new_raw(Unit *unit);
void job_free(Job *job);
+Job* job_install(Job *j);
+int job_install_deserialized(Job *j);
+void job_uninstall(Job *j);
void job_dump(Job *j, FILE*f, const char *prefix);
+int job_serialize(Job *j, FILE *f, FDSet *fds);
+int job_deserialize(Job *j, FILE *f, FDSet *fds);
+int job_coldplug(Job *j);
JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts);
void job_dependency_free(JobDependency *l);
-bool job_is_anchor(Job *j);
-
int job_merge(Job *j, Job *other);
JobType job_type_lookup_merge(JobType a, JobType b);
-static inline int job_type_merge(JobType *a, JobType b) {
- JobType t = job_type_lookup_merge(*a, b);
- if (t < 0)
- return -EEXIST;
- *a = t;
- return 0;
-}
-
static inline bool job_type_is_mergeable(JobType a, JobType b) {
return job_type_lookup_merge(a, b) >= 0;
}
bool job_type_is_redundant(JobType a, UnitActiveState b);
+/* Collapses a state-dependent job type into a simpler type by observing
+ * the state of the unit which it is going to be applied to. */
+void job_type_collapse(JobType *t, Unit *u);
+
+int job_type_merge_and_collapse(JobType *a, JobType b, Unit *u);
+
bool job_is_runnable(Job *j);
void job_add_to_run_queue(Job *j);
void job_timer_event(Job *j, uint64_t n_elapsed, Watch *w);
int job_run_and_invalidate(Job *j);
-int job_finish_and_invalidate(Job *j, JobResult result);
+int job_finish_and_invalidate(Job *j, JobResult result, bool recursive);
char *job_dbus_path(Job *j);