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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #ifndef foosdeventhfoo | |
4 | #define foosdeventhfoo | |
5 | ||
6 | /*** | |
7 | This file is part of systemd. | |
8 | ||
9 | Copyright 2013 Lennart Poettering | |
10 | ||
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. | |
15 | ||
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. | |
20 | ||
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/>. | |
23 | ***/ | |
24 | ||
25 | #include <sys/types.h> | |
26 | #include <sys/signalfd.h> | |
27 | #include <sys/epoll.h> | |
28 | #include <inttypes.h> | |
29 | #include <signal.h> | |
30 | ||
31 | #include "_sd-common.h" | |
32 | ||
33 | /* | |
34 | Why is this better than pure epoll? | |
35 | ||
36 | - Supports event source prioritization | |
37 | - Scales better with a large number of time events because it does not require one timerfd each | |
38 | - Automatically tries to coalesce timer events system-wide | |
39 | - Handles signals and child PIDs | |
40 | */ | |
41 | ||
42 | _SD_BEGIN_DECLARATIONS; | |
43 | ||
44 | typedef struct sd_event sd_event; | |
45 | typedef struct sd_event_source sd_event_source; | |
46 | ||
47 | enum { | |
48 | SD_EVENT_OFF = 0, | |
49 | SD_EVENT_ON = 1, | |
50 | SD_EVENT_ONESHOT = -1 | |
51 | }; | |
52 | ||
53 | enum { | |
54 | SD_EVENT_PASSIVE, | |
5eef597e MP |
55 | SD_EVENT_PREPARED, |
56 | SD_EVENT_PENDING, | |
60f067b4 JS |
57 | SD_EVENT_RUNNING, |
58 | SD_EVENT_EXITING, | |
59 | SD_EVENT_FINISHED | |
60 | }; | |
61 | ||
62 | enum { | |
63 | /* And everything in-between and outside is good too */ | |
64 | SD_EVENT_PRIORITY_IMPORTANT = -100, | |
65 | SD_EVENT_PRIORITY_NORMAL = 0, | |
66 | SD_EVENT_PRIORITY_IDLE = 100 | |
67 | }; | |
68 | ||
69 | typedef int (*sd_event_handler_t)(sd_event_source *s, void *userdata); | |
70 | typedef int (*sd_event_io_handler_t)(sd_event_source *s, int fd, uint32_t revents, void *userdata); | |
71 | typedef int (*sd_event_time_handler_t)(sd_event_source *s, uint64_t usec, void *userdata); | |
72 | typedef int (*sd_event_signal_handler_t)(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata); | |
73 | typedef int (*sd_event_child_handler_t)(sd_event_source *s, const siginfo_t *si, void *userdata); | |
74 | ||
75 | int sd_event_default(sd_event **e); | |
76 | ||
77 | int sd_event_new(sd_event **e); | |
78 | sd_event* sd_event_ref(sd_event *e); | |
79 | sd_event* sd_event_unref(sd_event *e); | |
80 | ||
81 | int sd_event_add_io(sd_event *e, sd_event_source **s, int fd, uint32_t events, sd_event_io_handler_t callback, void *userdata); | |
82 | int sd_event_add_time(sd_event *e, sd_event_source **s, clockid_t clock, uint64_t usec, uint64_t accuracy, sd_event_time_handler_t callback, void *userdata); | |
83 | int sd_event_add_signal(sd_event *e, sd_event_source **s, int sig, sd_event_signal_handler_t callback, void *userdata); | |
84 | int sd_event_add_child(sd_event *e, sd_event_source **s, pid_t pid, int options, sd_event_child_handler_t callback, void *userdata); | |
85 | int sd_event_add_defer(sd_event *e, sd_event_source **s, sd_event_handler_t callback, void *userdata); | |
86 | int sd_event_add_post(sd_event *e, sd_event_source **s, sd_event_handler_t callback, void *userdata); | |
87 | int sd_event_add_exit(sd_event *e, sd_event_source **s, sd_event_handler_t callback, void *userdata); | |
88 | ||
5eef597e MP |
89 | int sd_event_prepare(sd_event *e); |
90 | int sd_event_wait(sd_event *e, uint64_t timeout); | |
91 | int sd_event_dispatch(sd_event *e); | |
60f067b4 JS |
92 | int sd_event_run(sd_event *e, uint64_t timeout); |
93 | int sd_event_loop(sd_event *e); | |
94 | int sd_event_exit(sd_event *e, int code); | |
95 | ||
96 | int sd_event_now(sd_event *e, clockid_t clock, uint64_t *usec); | |
97 | ||
5eef597e | 98 | int sd_event_get_fd(sd_event *e); |
60f067b4 JS |
99 | int sd_event_get_state(sd_event *e); |
100 | int sd_event_get_tid(sd_event *e, pid_t *tid); | |
101 | int sd_event_get_exit_code(sd_event *e, int *code); | |
102 | int sd_event_set_watchdog(sd_event *e, int b); | |
103 | int sd_event_get_watchdog(sd_event *e); | |
104 | ||
105 | sd_event_source* sd_event_source_ref(sd_event_source *s); | |
106 | sd_event_source* sd_event_source_unref(sd_event_source *s); | |
107 | ||
108 | sd_event *sd_event_source_get_event(sd_event_source *s); | |
109 | void* sd_event_source_get_userdata(sd_event_source *s); | |
110 | void* sd_event_source_set_userdata(sd_event_source *s, void *userdata); | |
111 | ||
f47781d8 MP |
112 | int sd_event_source_set_description(sd_event_source *s, const char *description); |
113 | int sd_event_source_get_description(sd_event_source *s, const char **description); | |
60f067b4 JS |
114 | int sd_event_source_set_prepare(sd_event_source *s, sd_event_handler_t callback); |
115 | int sd_event_source_get_pending(sd_event_source *s); | |
116 | int sd_event_source_get_priority(sd_event_source *s, int64_t *priority); | |
117 | int sd_event_source_set_priority(sd_event_source *s, int64_t priority); | |
118 | int sd_event_source_get_enabled(sd_event_source *s, int *enabled); | |
119 | int sd_event_source_set_enabled(sd_event_source *s, int enabled); | |
120 | int sd_event_source_get_io_fd(sd_event_source *s); | |
121 | int sd_event_source_set_io_fd(sd_event_source *s, int fd); | |
122 | int sd_event_source_get_io_events(sd_event_source *s, uint32_t* events); | |
123 | int sd_event_source_set_io_events(sd_event_source *s, uint32_t events); | |
124 | int sd_event_source_get_io_revents(sd_event_source *s, uint32_t* revents); | |
125 | int sd_event_source_get_time(sd_event_source *s, uint64_t *usec); | |
126 | int sd_event_source_set_time(sd_event_source *s, uint64_t usec); | |
127 | int sd_event_source_get_time_accuracy(sd_event_source *s, uint64_t *usec); | |
128 | int sd_event_source_set_time_accuracy(sd_event_source *s, uint64_t usec); | |
129 | int sd_event_source_get_time_clock(sd_event_source *s, clockid_t *clock); | |
130 | int sd_event_source_get_signal(sd_event_source *s); | |
131 | int sd_event_source_get_child_pid(sd_event_source *s, pid_t *pid); | |
132 | ||
133 | _SD_END_DECLARATIONS; | |
134 | ||
135 | #endif |