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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
5163a1c5 | 2 | /* Event management routine header. |
718e3744 | 3 | * Copyright (C) 1998 Kunihiro Ishiguro |
718e3744 | 4 | */ |
5 | ||
6 | #ifndef _ZEBRA_THREAD_H | |
7 | #define _ZEBRA_THREAD_H | |
8 | ||
5734509c | 9 | #include <zebra.h> |
1189d95f | 10 | #include <pthread.h> |
75bcb355 QY |
11 | #include <poll.h> |
12 | #include "monotime.h" | |
fbcac826 | 13 | #include "frratomic.h" |
c284542b | 14 | #include "typesafe.h" |
60a3efec | 15 | #include "xref.h" |
5734509c | 16 | |
5e244469 RW |
17 | #ifdef __cplusplus |
18 | extern "C" { | |
19 | #endif | |
20 | ||
45f01188 DL |
21 | extern bool cputime_enabled; |
22 | extern unsigned long cputime_threshold; | |
23 | /* capturing wallclock time is always enabled since it is fast (reading | |
24 | * hardware TSC w/o syscalls) | |
25 | */ | |
26 | extern unsigned long walltime_threshold; | |
27 | ||
d62a17ae | 28 | struct rusage_t { |
6418e2d3 DL |
29 | #ifdef HAVE_CLOCK_THREAD_CPUTIME_ID |
30 | struct timespec cpu; | |
31 | #else | |
d62a17ae | 32 | struct rusage cpu; |
6418e2d3 | 33 | #endif |
d62a17ae | 34 | struct timeval real; |
8b70d0b0 | 35 | }; |
24a58196 | 36 | #define RUSAGE_T struct rusage_t |
8b70d0b0 | 37 | |
5f6eaa9b | 38 | #define GETRUSAGE(X) event_getrusage(X) |
718e3744 | 39 | |
3905fb73 DS |
40 | PREDECL_LIST(event_list); |
41 | PREDECL_HEAP(event_timer_list); | |
4becea72 | 42 | |
d62a17ae | 43 | struct fd_handler { |
44 | /* number of pfd that fit in the allocated space of pfds. This is a | |
a9318a32 MS |
45 | * constant and is the same for both pfds and copy. |
46 | */ | |
d62a17ae | 47 | nfds_t pfdsize; |
48 | ||
49 | /* file descriptors to monitor for i/o */ | |
50 | struct pollfd *pfds; | |
51 | /* number of pollfds stored in pfds */ | |
52 | nfds_t pfdcount; | |
53 | ||
54 | /* chunk used for temp copy of pollfds */ | |
55 | struct pollfd *copy; | |
56 | /* number of pollfds stored in copy */ | |
57 | nfds_t copycount; | |
0a95a0d0 | 58 | }; |
0a95a0d0 | 59 | |
5163a1c5 | 60 | struct xref_eventsched { |
60a3efec DL |
61 | struct xref xref; |
62 | ||
63 | const char *funcname; | |
64 | const char *dest; | |
2ccccdf5 | 65 | uint32_t event_type; |
60a3efec DL |
66 | }; |
67 | ||
718e3744 | 68 | /* Master of the theads. */ |
cd9d0537 | 69 | struct event_loop { |
d62a17ae | 70 | char *name; |
71 | ||
e6685141 DS |
72 | struct event **read; |
73 | struct event **write; | |
3905fb73 DS |
74 | struct event_timer_list_head timer; |
75 | struct event_list_head event, ready, unuse; | |
d62a17ae | 76 | struct list *cancel_req; |
77 | bool canceled; | |
78 | pthread_cond_t cancel_cond; | |
79 | struct hash *cpu_record; | |
80 | int io_pipe[2]; | |
81 | int fd_limit; | |
82 | struct fd_handler handler; | |
83 | unsigned long alloc; | |
84 | long selectpoll_timeout; | |
85 | bool spin; | |
86 | bool handle_signals; | |
87 | pthread_mutex_t mtx; | |
88 | pthread_t owner; | |
5e822957 DS |
89 | |
90 | bool ready_run_loop; | |
91 | RUSAGE_T last_getrusage; | |
718e3744 | 92 | }; |
93 | ||
2ccccdf5 DS |
94 | /* Event types. */ |
95 | enum event_types { | |
96 | EVENT_READ, | |
97 | EVENT_WRITE, | |
98 | EVENT_TIMER, | |
99 | EVENT_EVENT, | |
100 | EVENT_READY, | |
101 | EVENT_UNUSED, | |
102 | EVENT_EXECUTE, | |
103 | }; | |
104 | ||
04ec6679 | 105 | /* Event itself. */ |
e6685141 | 106 | struct event { |
04ec6679 DS |
107 | enum event_types type; /* event type */ |
108 | enum event_types add_type; /* event type */ | |
3905fb73 DS |
109 | struct event_list_item eventitem; |
110 | struct event_timer_list_item timeritem; | |
e6685141 | 111 | struct event **ref; /* external reference (if given) */ |
cd9d0537 | 112 | struct event_loop *master; /* pointer to the struct event_loop */ |
e6685141 | 113 | void (*func)(struct event *); /* event function */ |
d62a17ae | 114 | void *arg; /* event argument */ |
115 | union { | |
116 | int val; /* second argument of the event. */ | |
117 | int fd; /* file descriptor in case of r/w */ | |
118 | struct timeval sands; /* rest of time sands value. */ | |
119 | } u; | |
d62a17ae | 120 | struct timeval real; |
24a58196 DS |
121 | struct cpu_event_history *hist; /* cache pointer to cpu_history */ |
122 | unsigned long yield; /* yield time in microseconds */ | |
5163a1c5 | 123 | const struct xref_eventsched *xref; /* origin location */ |
24a58196 | 124 | pthread_mutex_t mtx; /* mutex for thread.c functions */ |
e8b3a2f7 | 125 | bool ignore_timer_late; |
e04ab74d | 126 | }; |
127 | ||
f59e6882 | 128 | #ifdef _FRR_ATTRIBUTE_PRINTFRR |
e6685141 | 129 | #pragma FRR printfrr_ext "%pTH"(struct event *) |
f59e6882 DL |
130 | #endif |
131 | ||
04ec6679 | 132 | struct cpu_event_history { |
e6685141 | 133 | void (*func)(struct event *); |
9b8e01ca DS |
134 | atomic_size_t total_cpu_warn; |
135 | atomic_size_t total_wall_warn; | |
1dd08c22 | 136 | atomic_size_t total_starv_warn; |
72327cf3 MS |
137 | atomic_size_t total_calls; |
138 | atomic_size_t total_active; | |
d62a17ae | 139 | struct time_stats { |
c8a65463 | 140 | atomic_size_t total, max; |
d62a17ae | 141 | } real; |
142 | struct time_stats cpu; | |
c8a65463 | 143 | atomic_uint_fast32_t types; |
d62a17ae | 144 | const char *funcname; |
718e3744 | 145 | }; |
146 | ||
ca1f4309 DS |
147 | /* Struct timeval's tv_usec one second value. */ |
148 | #define TIMER_SECOND_MICRO 1000000L | |
149 | ||
70d4d90c | 150 | /* Event yield time. */ |
ba7d2705 | 151 | #define EVENT_YIELD_TIME_SLOT 10 * 1000L /* 10ms */ |
718e3744 | 152 | |
70d4d90c | 153 | #define EVENT_TIMER_STRLEN 12 |
0447957e | 154 | |
718e3744 | 155 | /* Macros. */ |
e16d030c DS |
156 | #define EVENT_ARG(X) ((X)->arg) |
157 | #define EVENT_FD(X) ((X)->u.fd) | |
158 | #define EVENT_VAL(X) ((X)->u.val) | |
718e3744 | 159 | |
50478845 MS |
160 | /* |
161 | * Please consider this macro deprecated, and do not use it in new code. | |
162 | */ | |
e16d030c | 163 | #define EVENT_OFF(thread) \ |
332beb64 DS |
164 | do { \ |
165 | if ((thread)) \ | |
166 | event_cancel(&(thread)); \ | |
50478845 | 167 | } while (0) |
718e3744 | 168 | |
60a3efec DL |
169 | /* |
170 | * Macro wrappers to generate xrefs for all thread add calls. Includes | |
171 | * file/line/function info for debugging/tracing. | |
172 | */ | |
173 | #include "lib/xref.h" | |
174 | ||
175 | #define _xref_t_a(addfn, type, m, f, a, v, t) \ | |
176 | ({ \ | |
5163a1c5 | 177 | static const struct xref_eventsched _xref __attribute__( \ |
907a2395 | 178 | (used)) = { \ |
5163a1c5 | 179 | .xref = XREF_INIT(XREFT_EVENTSCHED, NULL, __func__), \ |
60a3efec DL |
180 | .funcname = #f, \ |
181 | .dest = #t, \ | |
2ccccdf5 | 182 | .event_type = EVENT_##type, \ |
60a3efec DL |
183 | }; \ |
184 | XREF_LINK(_xref.xref); \ | |
907a2395 DS |
185 | _event_add_##addfn(&_xref, m, f, a, v, t); \ |
186 | }) /* end */ | |
60a3efec | 187 | |
907a2395 DS |
188 | #define event_add_read(m, f, a, v, t) _xref_t_a(read_write, READ, m, f, a, v, t) |
189 | #define event_add_write(m, f, a, v, t) \ | |
190 | _xref_t_a(read_write, WRITE, m, f, a, v, t) | |
191 | #define event_add_timer(m, f, a, v, t) _xref_t_a(timer, TIMER, m, f, a, v, t) | |
192 | #define event_add_timer_msec(m, f, a, v, t) \ | |
193 | _xref_t_a(timer_msec, TIMER, m, f, a, v, t) | |
194 | #define event_add_timer_tv(m, f, a, v, t) \ | |
195 | _xref_t_a(timer_tv, TIMER, m, f, a, v, t) | |
196 | #define event_add_event(m, f, a, v, t) _xref_t_a(event, EVENT, m, f, a, v, t) | |
60a3efec | 197 | |
8c1186d3 | 198 | #define event_execute(m, f, a, v) \ |
60a3efec | 199 | ({ \ |
5163a1c5 | 200 | static const struct xref_eventsched _xref __attribute__( \ |
2ccccdf5 | 201 | (used)) = { \ |
5163a1c5 | 202 | .xref = XREF_INIT(XREFT_EVENTSCHED, NULL, __func__), \ |
60a3efec DL |
203 | .funcname = #f, \ |
204 | .dest = NULL, \ | |
2ccccdf5 | 205 | .event_type = EVENT_EXECUTE, \ |
60a3efec DL |
206 | }; \ |
207 | XREF_LINK(_xref.xref); \ | |
8c1186d3 | 208 | _event_execute(&_xref, m, f, a, v); \ |
60a3efec | 209 | }) /* end */ |
fb9e46bb | 210 | |
718e3744 | 211 | /* Prototypes. */ |
cd9d0537 DS |
212 | extern struct event_loop *event_master_create(const char *name); |
213 | void event_master_set_name(struct event_loop *master, const char *name); | |
214 | extern void event_master_free(struct event_loop *m); | |
215 | extern void event_master_free_unused(struct event_loop *m); | |
8cc4198f | 216 | |
5163a1c5 | 217 | extern void _event_add_read_write(const struct xref_eventsched *xref, |
cd9d0537 | 218 | struct event_loop *master, |
907a2395 DS |
219 | void (*fn)(struct event *), void *arg, int fd, |
220 | struct event **tref); | |
221 | ||
5163a1c5 | 222 | extern void _event_add_timer(const struct xref_eventsched *xref, |
cd9d0537 | 223 | struct event_loop *master, |
907a2395 DS |
224 | void (*fn)(struct event *), void *arg, long t, |
225 | struct event **tref); | |
226 | ||
5163a1c5 | 227 | extern void _event_add_timer_msec(const struct xref_eventsched *xref, |
cd9d0537 | 228 | struct event_loop *master, |
907a2395 DS |
229 | void (*fn)(struct event *), void *arg, long t, |
230 | struct event **tref); | |
231 | ||
5163a1c5 | 232 | extern void _event_add_timer_tv(const struct xref_eventsched *xref, |
cd9d0537 | 233 | struct event_loop *master, |
907a2395 DS |
234 | void (*fn)(struct event *), void *arg, |
235 | struct timeval *tv, struct event **tref); | |
236 | ||
5163a1c5 | 237 | extern void _event_add_event(const struct xref_eventsched *xref, |
cd9d0537 | 238 | struct event_loop *master, |
907a2395 DS |
239 | void (*fn)(struct event *), void *arg, int val, |
240 | struct event **tref); | |
60a3efec | 241 | |
5163a1c5 | 242 | extern void _event_execute(const struct xref_eventsched *xref, |
cd9d0537 | 243 | struct event_loop *master, |
8c1186d3 | 244 | void (*fn)(struct event *), void *arg, int val); |
9c7753e4 | 245 | |
332beb64 | 246 | extern void event_cancel(struct event **event); |
cd9d0537 | 247 | extern void event_cancel_async(struct event_loop *m, struct event **eptr, |
2453d15d | 248 | void *data); |
a9318a32 | 249 | /* Cancel ready tasks with an arg matching 'arg' */ |
cd9d0537 | 250 | extern void event_cancel_event_ready(struct event_loop *m, void *arg); |
a9318a32 | 251 | /* Cancel all tasks with an arg matching 'arg', including timers and io */ |
cd9d0537 DS |
252 | extern void event_cancel_event(struct event_loop *m, void *arg); |
253 | extern struct event *event_fetch(struct event_loop *m, struct event *event); | |
de2754be | 254 | extern void event_call(struct event *event); |
4f830a07 DS |
255 | extern unsigned long event_timer_remain_second(struct event *event); |
256 | extern struct timeval event_timer_remain(struct event *event); | |
257 | extern unsigned long event_timer_remain_msec(struct event *event); | |
70c35c11 | 258 | extern int event_should_yield(struct event *event); |
50596be0 | 259 | /* set yield time for thread */ |
2453d15d | 260 | extern void event_set_yield_time(struct event *event, unsigned long ytime); |
718e3744 | 261 | |
55c72803 | 262 | /* Internal libfrr exports */ |
2453d15d | 263 | extern void event_getrusage(RUSAGE_T *r); |
5f6eaa9b | 264 | extern void event_cmd_init(void); |
e04ab74d | 265 | |
8b70d0b0 | 266 | /* Returns elapsed real (wall clock) time. */ |
5f6eaa9b DS |
267 | extern unsigned long event_consumed_time(RUSAGE_T *after, RUSAGE_T *before, |
268 | unsigned long *cpu_time_elapsed); | |
8b70d0b0 | 269 | |
d1265948 | 270 | /* only for use in logging functions! */ |
e0bebc7c | 271 | extern pthread_key_t thread_current; |
5f6eaa9b DS |
272 | extern char *event_timer_to_hhmmss(char *buf, int buf_size, |
273 | struct event *t_timer); | |
d1265948 | 274 | |
5f6eaa9b | 275 | static inline bool event_is_scheduled(struct event *thread) |
cfb9e0ee DS |
276 | { |
277 | if (thread) | |
278 | return true; | |
279 | ||
280 | return false; | |
281 | } | |
282 | ||
1543c387 MS |
283 | /* Debug signal mask */ |
284 | void debug_signals(const sigset_t *sigs); | |
285 | ||
5f6eaa9b | 286 | static inline void event_ignore_late_timer(struct event *event) |
e8b3a2f7 | 287 | { |
e6685141 | 288 | event->ignore_timer_late = true; |
e8b3a2f7 DS |
289 | } |
290 | ||
5e244469 RW |
291 | #ifdef __cplusplus |
292 | } | |
293 | #endif | |
294 | ||
718e3744 | 295 | #endif /* _ZEBRA_THREAD_H */ |