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718e3744 | 1 | /* Thread management routine header. |
2 | * Copyright (C) 1998 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #ifndef _ZEBRA_THREAD_H | |
22 | #define _ZEBRA_THREAD_H | |
23 | ||
5734509c | 24 | #include <zebra.h> |
1189d95f | 25 | #include <pthread.h> |
75bcb355 QY |
26 | #include <poll.h> |
27 | #include "monotime.h" | |
5734509c | 28 | |
d62a17ae | 29 | struct rusage_t { |
30 | struct rusage cpu; | |
31 | struct timeval real; | |
8b70d0b0 | 32 | }; |
33 | #define RUSAGE_T struct rusage_t | |
34 | ||
db9c0df9 | 35 | #define GETRUSAGE(X) thread_getrusage(X) |
718e3744 | 36 | |
37 | /* Linked list of thread. */ | |
d62a17ae | 38 | struct thread_list { |
39 | struct thread *head; | |
40 | struct thread *tail; | |
41 | int count; | |
718e3744 | 42 | }; |
43 | ||
4becea72 CF |
44 | struct pqueue; |
45 | ||
d62a17ae | 46 | struct fd_handler { |
47 | /* number of pfd that fit in the allocated space of pfds. This is a | |
48 | * constant | |
49 | * and is the same for both pfds and copy. */ | |
50 | nfds_t pfdsize; | |
51 | ||
52 | /* file descriptors to monitor for i/o */ | |
53 | struct pollfd *pfds; | |
54 | /* number of pollfds stored in pfds */ | |
55 | nfds_t pfdcount; | |
56 | ||
57 | /* chunk used for temp copy of pollfds */ | |
58 | struct pollfd *copy; | |
59 | /* number of pollfds stored in copy */ | |
60 | nfds_t copycount; | |
0a95a0d0 | 61 | }; |
0a95a0d0 | 62 | |
63ccb9cb | 63 | struct cancel_req { |
d62a17ae | 64 | struct thread *thread; |
65 | void *eventobj; | |
66 | struct thread **threadref; | |
63ccb9cb QY |
67 | }; |
68 | ||
718e3744 | 69 | /* Master of the theads. */ |
d62a17ae | 70 | struct thread_master { |
71 | char *name; | |
72 | ||
d764d2cc | 73 | int tick_since_io; |
d62a17ae | 74 | struct thread **read; |
75 | struct thread **write; | |
76 | struct pqueue *timer; | |
77 | struct thread_list event; | |
78 | struct thread_list ready; | |
79 | struct thread_list unuse; | |
80 | struct list *cancel_req; | |
81 | bool canceled; | |
82 | pthread_cond_t cancel_cond; | |
83 | struct hash *cpu_record; | |
84 | int io_pipe[2]; | |
85 | int fd_limit; | |
86 | struct fd_handler handler; | |
87 | unsigned long alloc; | |
88 | long selectpoll_timeout; | |
89 | bool spin; | |
90 | bool handle_signals; | |
91 | pthread_mutex_t mtx; | |
92 | pthread_t owner; | |
718e3744 | 93 | }; |
94 | ||
41b2373c PJ |
95 | typedef unsigned char thread_type; |
96 | ||
718e3744 | 97 | /* Thread itself. */ |
d62a17ae | 98 | struct thread { |
99 | thread_type type; /* thread type */ | |
100 | thread_type add_type; /* thread type */ | |
101 | struct thread *next; /* next pointer of the thread */ | |
102 | struct thread *prev; /* previous pointer of the thread */ | |
103 | struct thread **ref; /* external reference (if given) */ | |
104 | struct thread_master *master; /* pointer to the struct thread_master */ | |
105 | int (*func)(struct thread *); /* event function */ | |
106 | void *arg; /* event argument */ | |
107 | union { | |
108 | int val; /* second argument of the event. */ | |
109 | int fd; /* file descriptor in case of r/w */ | |
110 | struct timeval sands; /* rest of time sands value. */ | |
111 | } u; | |
112 | int index; /* queue position for timers */ | |
113 | struct timeval real; | |
114 | struct cpu_thread_history *hist; /* cache pointer to cpu_history */ | |
115 | unsigned long yield; /* yield time in microseconds */ | |
116 | const char *funcname; /* name of thread function */ | |
117 | const char *schedfrom; /* source file thread was scheduled from */ | |
118 | int schedfrom_line; /* line number of source file */ | |
119 | pthread_mutex_t mtx; /* mutex for thread.c functions */ | |
e04ab74d | 120 | }; |
121 | ||
d62a17ae | 122 | struct cpu_thread_history { |
123 | int (*func)(struct thread *); | |
124 | unsigned int total_calls; | |
125 | unsigned int total_active; | |
126 | struct time_stats { | |
127 | unsigned long total, max; | |
128 | } real; | |
129 | struct time_stats cpu; | |
130 | thread_type types; | |
131 | const char *funcname; | |
718e3744 | 132 | }; |
133 | ||
ca1f4309 DS |
134 | /* Struct timeval's tv_usec one second value. */ |
135 | #define TIMER_SECOND_MICRO 1000000L | |
136 | ||
718e3744 | 137 | /* Thread types. */ |
138 | #define THREAD_READ 0 | |
139 | #define THREAD_WRITE 1 | |
140 | #define THREAD_TIMER 2 | |
141 | #define THREAD_EVENT 3 | |
142 | #define THREAD_READY 4 | |
a587d00b QY |
143 | #define THREAD_UNUSED 5 |
144 | #define THREAD_EXECUTE 6 | |
718e3744 | 145 | |
146 | /* Thread yield time. */ | |
17fc128d | 147 | #define THREAD_YIELD_TIME_SLOT 10 * 1000L /* 10ms */ |
718e3744 | 148 | |
149 | /* Macros. */ | |
150 | #define THREAD_ARG(X) ((X)->arg) | |
151 | #define THREAD_FD(X) ((X)->u.fd) | |
152 | #define THREAD_VAL(X) ((X)->u.val) | |
153 | ||
d62a17ae | 154 | #define THREAD_OFF(thread) \ |
155 | do { \ | |
156 | if (thread) { \ | |
157 | thread_cancel(thread); \ | |
158 | thread = NULL; \ | |
159 | } \ | |
160 | } while (0) | |
718e3744 | 161 | |
162 | #define THREAD_READ_OFF(thread) THREAD_OFF(thread) | |
163 | #define THREAD_WRITE_OFF(thread) THREAD_OFF(thread) | |
164 | #define THREAD_TIMER_OFF(thread) THREAD_OFF(thread) | |
165 | ||
9c7753e4 DL |
166 | #define debugargdef const char *funcname, const char *schedfrom, int fromln |
167 | ||
ffa2c898 QY |
168 | #define thread_add_read(m,f,a,v,t) funcname_thread_add_read_write(THREAD_READ,m,f,a,v,t,#f,__FILE__,__LINE__) |
169 | #define thread_add_write(m,f,a,v,t) funcname_thread_add_read_write(THREAD_WRITE,m,f,a,v,t,#f,__FILE__,__LINE__) | |
170 | #define thread_add_timer(m,f,a,v,t) funcname_thread_add_timer(m,f,a,v,t,#f,__FILE__,__LINE__) | |
171 | #define thread_add_timer_msec(m,f,a,v,t) funcname_thread_add_timer_msec(m,f,a,v,t,#f,__FILE__,__LINE__) | |
172 | #define thread_add_timer_tv(m,f,a,v,t) funcname_thread_add_timer_tv(m,f,a,v,t,#f,__FILE__,__LINE__) | |
173 | #define thread_add_event(m,f,a,v,t) funcname_thread_add_event(m,f,a,v,t,#f,__FILE__,__LINE__) | |
9c7753e4 | 174 | #define thread_execute(m,f,a,v) funcname_thread_execute(m,f,a,v,#f,__FILE__,__LINE__) |
fb9e46bb | 175 | |
718e3744 | 176 | /* Prototypes. */ |
d62a17ae | 177 | extern struct thread_master *thread_master_create(const char *); |
178 | extern void thread_master_free(struct thread_master *); | |
495f0b13 | 179 | extern void thread_master_free_unused(struct thread_master *); |
8cc4198f | 180 | |
d62a17ae | 181 | extern struct thread * |
182 | funcname_thread_add_read_write(int dir, struct thread_master *, | |
183 | int (*)(struct thread *), void *, int, | |
184 | struct thread **, debugargdef); | |
185 | ||
186 | extern struct thread *funcname_thread_add_timer(struct thread_master *, | |
187 | int (*)(struct thread *), | |
188 | void *, long, struct thread **, | |
189 | debugargdef); | |
190 | ||
191 | extern struct thread * | |
192 | funcname_thread_add_timer_msec(struct thread_master *, int (*)(struct thread *), | |
193 | void *, long, struct thread **, debugargdef); | |
194 | ||
195 | extern struct thread *funcname_thread_add_timer_tv(struct thread_master *, | |
196 | int (*)(struct thread *), | |
197 | void *, struct timeval *, | |
198 | struct thread **, | |
199 | debugargdef); | |
200 | ||
201 | extern struct thread *funcname_thread_add_event(struct thread_master *, | |
202 | int (*)(struct thread *), | |
203 | void *, int, struct thread **, | |
204 | debugargdef); | |
205 | ||
206 | extern void funcname_thread_execute(struct thread_master *, | |
207 | int (*)(struct thread *), void *, int, | |
208 | debugargdef); | |
9c7753e4 DL |
209 | #undef debugargdef |
210 | ||
d62a17ae | 211 | extern void thread_cancel(struct thread *); |
212 | extern void thread_cancel_async(struct thread_master *, struct thread **, | |
213 | void *); | |
214 | extern void thread_cancel_event(struct thread_master *, void *); | |
215 | extern struct thread *thread_fetch(struct thread_master *, struct thread *); | |
216 | extern void thread_call(struct thread *); | |
217 | extern unsigned long thread_timer_remain_second(struct thread *); | |
218 | extern struct timeval thread_timer_remain(struct thread *); | |
219 | extern int thread_should_yield(struct thread *); | |
50596be0 | 220 | /* set yield time for thread */ |
d62a17ae | 221 | extern void thread_set_yield_time(struct thread *, unsigned long); |
718e3744 | 222 | |
55c72803 | 223 | /* Internal libfrr exports */ |
d62a17ae | 224 | extern void thread_getrusage(RUSAGE_T *); |
225 | extern void thread_cmd_init(void); | |
e04ab74d | 226 | |
8b70d0b0 | 227 | /* Returns elapsed real (wall clock) time. */ |
228 | extern unsigned long thread_consumed_time(RUSAGE_T *after, RUSAGE_T *before, | |
229 | unsigned long *cpu_time_elapsed); | |
230 | ||
d1265948 | 231 | /* only for use in logging functions! */ |
e0bebc7c | 232 | extern pthread_key_t thread_current; |
d1265948 | 233 | |
718e3744 | 234 | #endif /* _ZEBRA_THREAD_H */ |