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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef foojobhfoo
#define foojobhfoo
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdbool.h>
#include <inttypes.h>
#include <errno.h>
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_VERIFY_ACTIVE,
JOB_STOP,
JOB_RELOAD, /* if running reload */
JOB_RELOAD_OR_START, /* if running reload, if not running start */
/* 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_TYPE_MAX,
_JOB_TYPE_INVALID = -1
};
enum JobState {
JOB_WAITING,
JOB_RUNNING,
_JOB_STATE_MAX,
_JOB_STATE_INVALID = -1
};
enum JobMode {
JOB_FAIL, /* Fail if a conflicting job is already queued */
JOB_REPLACE, /* Replace an existing conflicting job */
JOB_ISOLATE, /* Start a unit, and stop all others */
JOB_IGNORE_DEPENDENCIES, /* Ignore both requirement and ordering dependencies */
JOB_IGNORE_REQUIREMENTS, /* Ignore requirement dependencies */
_JOB_MODE_MAX,
_JOB_MODE_INVALID = -1
};
enum JobResult {
JOB_DONE,
JOB_CANCELED,
JOB_TIMEOUT,
JOB_FAILED,
JOB_DEPENDENCY,
JOB_SKIPPED,
_JOB_RESULT_MAX,
_JOB_RESULT_INVALID = -1
};
struct JobDependency {
/* Encodes that the 'subject' job needs the 'object' job in
* some way. This structure is used only while building a transaction. */
Job *subject;
Job *object;
LIST_FIELDS(JobDependency, subject);
LIST_FIELDS(JobDependency, object);
bool matters;
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;
LIST_FIELDS(Job, transaction);
LIST_FIELDS(Job, run_queue);
LIST_FIELDS(Job, dbus_queue);
LIST_HEAD(JobDependency, subject_list);
LIST_HEAD(JobDependency, object_list);
/* Used for graph algs as a "I have been here" marker */
Job* marker;
unsigned generation;
uint32_t id;
JobType type;
JobState state;
Watch timer_watch;
/* There can be more than one client, because of job merging. */
LIST_HEAD(JobBusClient, bus_client_list);
JobResult result;
bool installed:1;
bool in_run_queue:1;
bool matters_to_anchor:1;
bool override:1;
bool in_dbus_queue:1;
bool sent_dbus_new_signal:1;
bool ignore_order:1;
};
JobBusClient* job_bus_client_new(DBusConnection *connection, const char *name);
Job* job_new(Unit *unit, JobType type);
void job_free(Job *job);
Job* job_install(Job *j);
void job_uninstall(Job *j);
void job_dump(Job *j, FILE*f, const char *prefix);
JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts);
void job_dependency_free(JobDependency *l);
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;
}
static inline bool job_type_is_conflicting(JobType a, JobType b) {
return !job_type_is_mergeable(a, b);
}
static inline bool job_type_is_superset(JobType a, JobType b) {
/* Checks whether operation a is a "superset" of b in its actions */
return a == job_type_lookup_merge(a, b);
}
bool job_type_is_redundant(JobType a, UnitActiveState b);
bool job_is_runnable(Job *j);
void job_add_to_run_queue(Job *j);
void job_add_to_dbus_queue(Job *j);
int job_start_timer(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);
char *job_dbus_path(Job *j);
const char* job_type_to_string(JobType t);
JobType job_type_from_string(const char *s);
const char* job_state_to_string(JobState t);
JobState job_state_from_string(const char *s);
const char* job_mode_to_string(JobMode t);
JobMode job_mode_from_string(const char *s);
const char* job_result_to_string(JobResult t);
JobResult job_result_from_string(const char *s);
#endif
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