manager.h

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #ifndef foomanagerhfoo
   4 #define foomanagerhfoo
   5
   6 #include <stdbool.h>
   7 #include <inttypes.h>
   8 #include <stdio.h>
   9
  10 typedef struct Manager Manager;
  11 typedef enum WatchType WatchType;
  12 typedef struct Watch Watch;
  13
  14 enum WatchType {
  15         WATCH_INVALID,
  16         WATCH_SIGNAL,
  17         WATCH_FD,
  18         WATCH_TIMER,
  19         WATCH_MOUNT
  20 };
  21
  22 struct Watch {
  23         int fd;
  24         WatchType type;
  25         union Unit *unit;
  26 };
  27
  28 #include "unit.h"
  29 #include "job.h"
  30 #include "hashmap.h"
  31 #include "list.h"
  32 #include "set.h"
  33
  34 #define SPECIAL_DEFAULT_TARGET "default.target"
  35 #define SPECIAL_SYSLOG_SERVICE "syslog.service"
  36 #define SPECIAL_DBUS_SERVICE "messagebus.service"
  37 #define SPECIAL_LOGGER_SOCKET "systemd-logger.socket"
  38 #define SPECIAL_KBREQUEST_TARGET "kbrequest.target"
  39 #define SPECIAL_CTRL_ALT_DEL_TARGET "ctrl-alt-del.target"
  40
  41 struct Manager {
  42         uint32_t current_job_id;
  43
  44         /* Note that the set of units we know of is allowed to be
  45          * incosistent. However the subset of it that is loaded may
  46          * not, and the list of jobs may neither. */
  47
  48         /* Active jobs and units */
  49         Hashmap *units;  /* name string => Unit object n:1 */
  50         Hashmap *jobs;   /* job id => Job object 1:1 */
  51
  52         /* To make it easy to iterate through the units of a specific
  53          * type we maintain a per type linked list */
  54         LIST_HEAD(Meta, units_per_type[_UNIT_TYPE_MAX]);
  55
  56         /* Units that need to be loaded */
  57         LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */
  58
  59         /* Jobs that need to be run */
  60         LIST_HEAD(Job, run_queue);   /* more a stack than a queue, too */
  61
  62         /* Jobs to be added */
  63         Hashmap *transaction_jobs;      /* Unit object => Job object list 1:1 */
  64         JobDependency *transaction_anchor;
  65
  66         bool dispatching_load_queue:1;
  67         bool dispatching_run_queue:1;
  68
  69         Hashmap *watch_pids;  /* pid => Unit object n:1 */
  70
  71         int epoll_fd;
  72
  73         Watch signal_watch;
  74
  75         /* Data specific to the device subsystem */
  76         struct udev* udev;
  77
  78         /* Data specific to the mount subsystem */
  79         FILE *proc_self_mountinfo;
  80         Watch mount_watch;
  81 };
  82
  83 Manager* manager_new(void);
  84 void manager_free(Manager *m);
  85
  86 int manager_coldplug(Manager *m);
  87
  88 Job *manager_get_job(Manager *m, uint32_t id);
  89 Unit *manager_get_unit(Manager *m, const char *name);
  90
  91 int manager_load_unit(Manager *m, const char *path_or_name, Unit **_ret);
  92 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret);
  93
  94 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
  95 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
  96
  97 void manager_transaction_unlink_job(Manager *m, Job *j);
  98
  99 void manager_clear_jobs(Manager *m);
 100
 101 void manager_dispatch_load_queue(Manager *m);
 102 void manager_dispatch_run_queue(Manager *m);
 103
 104 int manager_loop(Manager *m);
 105
 106 #endif