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;
37 #include "transaction.h"
42 /* Be careful when changing the job types! Adjust job_merging_table[] accordingly! */
44 JOB_START, /* if a unit does not support being started, we'll just wait until it becomes active */
49 JOB_RELOAD, /* if running reload */
50 JOB_RELOAD_OR_START, /* if running reload, if not running start */
52 /* Note that restarts are first treated like JOB_STOP, but
53 * then instead of finishing are patched to become
55 JOB_RESTART, /* if running stop, then start unconditionally */
56 JOB_TRY_RESTART, /* if running stop and then start */
59 _JOB_TYPE_INVALID = -1
66 _JOB_STATE_INVALID = -1
70 JOB_FAIL, /* Fail if a conflicting job is already queued */
71 JOB_REPLACE, /* Replace an existing conflicting job */
72 JOB_ISOLATE, /* Start a unit, and stop all others */
73 JOB_IGNORE_DEPENDENCIES, /* Ignore both requirement and ordering dependencies */
74 JOB_IGNORE_REQUIREMENTS, /* Ignore requirement dependencies */
76 _JOB_MODE_INVALID = -1
87 _JOB_RESULT_INVALID = -1
90 struct JobDependency {
91 /* Encodes that the 'subject' job needs the 'object' job in
92 * some way. This structure is used only while building a transaction. */
96 LIST_FIELDS(JobDependency, subject);
97 LIST_FIELDS(JobDependency, object);
107 LIST_FIELDS(Job, transaction);
108 LIST_FIELDS(Job, run_queue);
109 LIST_FIELDS(Job, dbus_queue);
111 LIST_HEAD(JobDependency, subject_list);
112 LIST_HEAD(JobDependency, object_list);
114 /* Used for graph algs as a "I have been here" marker */
125 /* Note that this bus object is not ref counted here. */
133 bool matters_to_anchor:1;
135 bool in_dbus_queue:1;
136 bool sent_dbus_new_signal:1;
140 Job* job_new(Unit *unit, JobType type);
141 void job_uninstall(Job *j);
142 void job_free(Job *job);
143 void job_dump(Job *j, FILE*f, const char *prefix);
145 JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts, Transaction *tr);
146 void job_dependency_free(JobDependency *l, Transaction *tr);
148 bool job_is_anchor(Job *j);
150 int job_merge(Job *j, Job *other);
152 JobType job_type_lookup_merge(JobType a, JobType b);
154 static inline int job_type_merge(JobType *a, JobType b) {
155 JobType t = job_type_lookup_merge(*a, b);
162 static inline bool job_type_is_mergeable(JobType a, JobType b) {
163 return job_type_lookup_merge(a, b) >= 0;
166 static inline bool job_type_is_conflicting(JobType a, JobType b) {
167 return !job_type_is_mergeable(a, b);
170 static inline bool job_type_is_superset(JobType a, JobType b) {
171 /* Checks whether operation a is a "superset" of b in its actions */
172 return a == job_type_lookup_merge(a, b);
175 bool job_type_is_redundant(JobType a, UnitActiveState b);
177 bool job_is_runnable(Job *j);
179 void job_add_to_run_queue(Job *j);
180 void job_add_to_dbus_queue(Job *j);
182 int job_start_timer(Job *j);
183 void job_timer_event(Job *j, uint64_t n_elapsed, Watch *w);
185 int job_run_and_invalidate(Job *j);
186 int job_finish_and_invalidate(Job *j, JobResult result);
188 char *job_dbus_path(Job *j);
190 const char* job_type_to_string(JobType t);
191 JobType job_type_from_string(const char *s);
193 const char* job_state_to_string(JobState t);
194 JobState job_state_from_string(const char *s);
196 const char* job_mode_to_string(JobMode t);
197 JobMode job_mode_from_string(const char *s);
199 const char* job_result_to_string(JobResult t);
200 JobResult job_result_from_string(const char *s);