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4 | typedef double ev_tstamp; |
4 | typedef double ev_tstamp; |
5 | |
5 | |
6 | /* eventmask, revents, events... */ |
6 | /* eventmask, revents, events... */ |
7 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
7 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
8 | #define EV_NONE 0 |
8 | #define EV_NONE 0x00 |
9 | #define EV_READ 1 |
9 | #define EV_READ 0x01 |
10 | #define EV_WRITE 2 |
10 | #define EV_WRITE 0x02 |
11 | #define EV_TIMEOUT 4 |
11 | #define EV_TIMEOUT 0x04 |
12 | #define EV_SIGNAL 8 |
12 | #define EV_SIGNAL 0x08 |
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13 | #define EV_IDLE 0x10 |
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14 | #define EV_CHECK 0x20 |
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15 | |
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16 | /* can be used to add custom fields to all watchers */ |
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17 | #ifndef EV_COMMON |
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18 | # define EV_COMMON void *data |
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19 | #endif |
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20 | |
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21 | /* |
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22 | * struct member types: |
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23 | * private: you can look at them, but not change them, and they might not mean anything to you. |
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24 | * ro: can be read anytime, but only changed when the watcher isn't active |
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25 | * rw: can be read and modified anytime, even when the watcher is active |
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26 | */ |
13 | |
27 | |
14 | /* shared by all watchers */ |
28 | /* shared by all watchers */ |
15 | #define EV_WATCHER(type) \ |
29 | #define EV_WATCHER(type) \ |
16 | int active; /* private */ \ |
30 | int active; /* private */ \ |
17 | int pending; /* private */ \ |
31 | int pending; /* private */ \ |
18 | void *data; /* rw */ \ |
32 | EV_COMMON; /* rw */ \ |
19 | void (*cb)(struct type *, int revents) /* rw */ |
33 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
20 | |
34 | |
21 | #define EV_WATCHER_LIST(type) \ |
35 | #define EV_WATCHER_LIST(type) \ |
22 | EV_WATCHER (type); \ |
36 | EV_WATCHER (type); \ |
23 | struct type *next /* private */ |
37 | struct type *next /* private */ |
24 | |
38 | |
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39 | #define EV_WATCHER_TIME(type) \ |
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40 | EV_WATCHER (type); \ |
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41 | ev_tstamp at /* private */ |
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42 | |
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43 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
25 | struct ev_timer |
44 | struct ev_timer |
26 | { |
45 | { |
27 | EV_WATCHER_LIST (ev_timer); |
46 | EV_WATCHER_TIME (ev_timer); |
28 | |
47 | |
29 | ev_tstamp at; /* private */ |
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30 | ev_tstamp repeat; /* rw */ |
48 | ev_tstamp repeat; /* rw */ |
31 | unsigned char is_abs; /* ro */ |
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32 | }; |
49 | }; |
33 | |
50 | |
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51 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
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52 | struct ev_periodic |
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53 | { |
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54 | EV_WATCHER_TIME (ev_periodic); |
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55 | |
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56 | ev_tstamp interval; /* rw */ |
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57 | }; |
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58 | |
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59 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
34 | struct ev_io |
60 | struct ev_io |
35 | { |
61 | { |
36 | EV_WATCHER_LIST (ev_io); |
62 | EV_WATCHER_LIST (ev_io); |
37 | |
63 | |
38 | int fd; /* ro */ |
64 | int fd; /* ro */ |
39 | int events; /* ro */ |
65 | int events; /* ro */ |
40 | }; |
66 | }; |
41 | |
67 | |
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68 | /* invoked when the given signal has been received */ |
42 | struct ev_signal |
69 | struct ev_signal |
43 | { |
70 | { |
44 | EV_WATCHER_LIST (ev_signal); |
71 | EV_WATCHER_LIST (ev_signal); |
45 | |
72 | |
46 | int signum; /* ro */ |
73 | int signum; /* ro */ |
47 | }; |
74 | }; |
48 | |
75 | |
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76 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
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77 | struct ev_idle |
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78 | { |
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79 | EV_WATCHER (ev_idle); |
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80 | }; |
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81 | |
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82 | /* invoked for each run of the mainloop, just before the next blocking vall is initiated */ |
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83 | struct ev_check |
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84 | { |
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85 | EV_WATCHER (ev_check); |
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86 | }; |
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87 | |
49 | #define EVMETHOD_NONE 0 |
88 | #define EVMETHOD_NONE 0 |
50 | #define EVMETHOD_SELECT 1 |
89 | #define EVMETHOD_SELECT 1 |
51 | #define EVMETHOD_EPOLL 2 |
90 | #define EVMETHOD_EPOLL 2 |
52 | int ev_init (int flags); |
91 | int ev_init (int flags); /* returns ev_method */ |
53 | extern int ev_method; |
92 | extern int ev_method; |
54 | |
93 | |
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94 | /* these three calls are suitable for plugging into pthread_atfork */ |
55 | void ev_prefork (void); |
95 | void ev_prefork (void); |
56 | void ev_postfork_parent (void); |
96 | void ev_postfork_parent (void); |
57 | void ev_postfork_child (void); |
97 | void ev_postfork_child (void); |
58 | |
98 | |
59 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
99 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
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63 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
103 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
64 | void ev_loop (int flags); |
104 | void ev_loop (int flags); |
65 | extern int ev_loop_done; /* set to 1 to break out of event loop */ |
105 | extern int ev_loop_done; /* set to 1 to break out of event loop */ |
66 | |
106 | |
67 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
107 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
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108 | /* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ |
68 | #define evw_init(ev,cb_,data_) do { (ev)->active = 0; (ev)->cb = (cb_); (ev)->data = (void *)data_; } while (0) |
109 | #define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->cb = (cb_); } while (0) |
69 | |
110 | |
70 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
111 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
71 | #define evtimer_set_rel(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); (ev)->is_abs = 0; } while (0) |
112 | #define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
72 | #define evtimer_set_abs(ev,at_,repeat_) do { (ev)->at = (at_); (ev)->repeat = (repeat_); (ev)->is_abs = 1; } while (0) |
113 | #define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
73 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
114 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
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115 | #define evcheck_set(ev) /* nop, yes this is a serious in-joke */ |
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116 | #define evidle_set(ev) /* nop, yes this is a serious in-joke */ |
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117 | |
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118 | #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) |
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119 | #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) |
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120 | #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) |
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121 | #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) |
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122 | #define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) |
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123 | #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) |
74 | |
124 | |
75 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
125 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
76 | |
126 | |
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127 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
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128 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
77 | void evio_start (struct ev_io *w); |
129 | void evio_start (struct ev_io *w); |
78 | void evio_stop (struct ev_io *w); |
130 | void evio_stop (struct ev_io *w); |
79 | |
131 | |
80 | void evtimer_start (struct ev_timer *w); |
132 | void evtimer_start (struct ev_timer *w); |
81 | void evtimer_stop (struct ev_timer *w); |
133 | void evtimer_stop (struct ev_timer *w); |
82 | |
134 | |
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135 | void evperiodic_start (struct ev_periodic *w); |
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136 | void evperiodic_stop (struct ev_periodic *w); |
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137 | |
83 | void evsignal_start (struct ev_signal *w); |
138 | void evsignal_start (struct ev_signal *w); |
84 | void evsignal_stop (struct ev_signal *w); |
139 | void evsignal_stop (struct ev_signal *w); |
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140 | |
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141 | void evidle_start (struct ev_idle *w); |
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142 | void evidle_stop (struct ev_idle *w); |
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143 | |
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144 | void evcheck_start (struct ev_check *w); |
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145 | void evcheck_stop (struct ev_check *w); |
85 | |
146 | |
86 | #endif |
147 | #endif |
87 | |
148 | |