1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
7 This file is part of systemd.
9 Copyright 2010 Lennart Poettering
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU Lesser General Public License as published by
13 the Free Software Foundation; either version 2.1 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 typedef struct Job Job;
30 typedef struct JobDependency JobDependency;
31 typedef enum JobType JobType;
32 typedef enum JobState JobState;
33 typedef enum JobMode JobMode;
34 typedef enum JobResult JobResult;
41 /* Be careful when changing the job types! Adjust job_merging_table[] accordingly! */
43 JOB_START, /* if a unit does not support being started, we'll just wait until it becomes active */
48 JOB_RELOAD, /* if running reload */
49 JOB_RELOAD_OR_START, /* if running reload, if not running start */
51 /* Note that restarts are first treated like JOB_STOP, but
52 * then instead of finishing are patched to become
54 JOB_RESTART, /* if running stop, then start unconditionally */
55 JOB_TRY_RESTART, /* if running stop and then start */
58 _JOB_TYPE_INVALID = -1
65 _JOB_STATE_INVALID = -1
69 JOB_FAIL, /* Fail if a conflicting job is already queued */
70 JOB_REPLACE, /* Replace an existing conflicting job */
71 JOB_ISOLATE, /* Start a unit, and stop all others */
72 JOB_IGNORE_DEPENDENCIES, /* Ignore both requirement and ordering dependencies */
73 JOB_IGNORE_REQUIREMENTS, /* Ignore requirement dependencies */
75 _JOB_MODE_INVALID = -1
86 _JOB_RESULT_INVALID = -1
89 struct JobDependency {
90 /* Encodes that the 'subject' job needs the 'object' job in
91 * some way. This structure is used only while building a transaction. */
95 LIST_FIELDS(JobDependency, subject);
96 LIST_FIELDS(JobDependency, object);
106 LIST_FIELDS(Job, transaction);
107 LIST_FIELDS(Job, run_queue);
108 LIST_FIELDS(Job, dbus_queue);
110 LIST_HEAD(JobDependency, subject_list);
111 LIST_HEAD(JobDependency, object_list);
113 /* Used for graph algs as a "I have been here" marker */
124 /* Note that this bus object is not ref counted here. */
132 bool matters_to_anchor:1;
134 bool in_dbus_queue:1;
135 bool sent_dbus_new_signal:1;
139 Job* job_new(Manager *m, JobType type, Unit *unit);
140 void job_free(Job *job);
141 void job_dump(Job *j, FILE*f, const char *prefix);
143 JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts);
144 void job_dependency_free(JobDependency *l);
146 bool job_is_anchor(Job *j);
148 int job_merge(Job *j, Job *other);
150 JobType job_type_lookup_merge(JobType a, JobType b);
152 static inline int job_type_merge(JobType *a, JobType b) {
153 JobType t = job_type_lookup_merge(*a, b);
160 static inline bool job_type_is_mergeable(JobType a, JobType b) {
161 return job_type_lookup_merge(a, b) >= 0;
164 static inline bool job_type_is_conflicting(JobType a, JobType b) {
165 return !job_type_is_mergeable(a, b);
168 static inline bool job_type_is_superset(JobType a, JobType b) {
169 /* Checks whether operation a is a "superset" of b in its actions */
170 return a == job_type_lookup_merge(a, b);
173 bool job_type_is_redundant(JobType a, UnitActiveState b);
175 bool job_is_runnable(Job *j);
177 void job_add_to_run_queue(Job *j);
178 void job_add_to_dbus_queue(Job *j);
180 int job_start_timer(Job *j);
181 void job_timer_event(Job *j, uint64_t n_elapsed, Watch *w);
183 int job_run_and_invalidate(Job *j);
184 int job_finish_and_invalidate(Job *j, JobResult result);
186 char *job_dbus_path(Job *j);
188 const char* job_type_to_string(JobType t);
189 JobType job_type_from_string(const char *s);
191 const char* job_state_to_string(JobState t);
192 JobState job_state_from_string(const char *s);
194 const char* job_mode_to_string(JobMode t);
195 JobMode job_mode_from_string(const char *s);
197 const char* job_result_to_string(JobResult t);
198 JobResult job_result_from_string(const char *s);