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_FD,
  17         WATCH_FD,
  18         WATCH_TIMER
  19 };
  20
  21 struct Watch {
  22         int fd;
  23         WatchType type;
  24         union Unit *unit;
  25 };
  26
  27 #include "unit.h"
  28 #include "job.h"
  29 #include "hashmap.h"
  30 #include "list.h"
  31 #include "set.h"
  32
  33 typedef enum SpecialUnit {
  34         SPECIAL_SYSLOG_SERVICE,
  35         SPECIAL_DBUS_SERVICE,
  36         SPECIAL_LOGGER_SOCKET,
  37         SPECIAL_CTRL_ALT_DEL_TARGET,
  38         SPECIAL_KBREQUEST_TARGET,
  39         _SPECIAL_UNIT_MAX
  40 } SpecialUnit;
  41
  42 struct Manager {
  43         uint32_t current_job_id;
  44
  45         /* Note that the set of units we know of is allowed to be
  46          * incosistent. However the subset of it that is loaded may
  47          * not, and the list of jobs may neither. */
  48
  49         /* Active jobs and units */
  50         Hashmap *units;  /* name string => Unit object n:1 */
  51         Hashmap *jobs;   /* job id => Job object 1:1 */
  52
  53         /* Units that need to be loaded */
  54         LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */
  55
  56         /* Jobs that need to be run */
  57         LIST_HEAD(Job, run_queue);   /* more a stack than a queue, too */
  58
  59         /* Jobs to be added */
  60         Hashmap *transaction_jobs;      /* Unit object => Job object list 1:1 */
  61         JobDependency *transaction_anchor;
  62
  63         bool dispatching_load_queue:1;
  64         bool dispatching_run_queue:1;
  65
  66         Hashmap *watch_pids;  /* pid => Unit object n:1 */
  67
  68         int epoll_fd;
  69
  70         Watch signal_watch;
  71
  72         Unit *special_units[_SPECIAL_UNIT_MAX]; /* some special units */
  73
  74         struct udev* udev;
  75 };
  76
  77 Manager* manager_new(void);
  78 void manager_free(Manager *m);
  79
  80 Job *manager_get_job(Manager *m, uint32_t id);
  81 Unit *manager_get_unit(Manager *m, const char *name);
  82
  83 int manager_load_unit(Manager *m, const char *path_or_name, Unit **_ret);
  84 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret);
  85
  86 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
  87 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
  88
  89 void manager_transaction_unlink_job(Manager *m, Job *j);
  90
  91 void manager_clear_jobs(Manager *m);
  92
  93 void manager_dispatch_run_queue(Manager *m);
  94 int manager_loop(Manager *m);
  95
  96 #endif