Commit | Line | Data |
---|---|---|
44a5e5eb DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #ifndef _HEALTH_H | |
19 | #define _HEALTH_H | |
20 | ||
21 | #include <stdint.h> | |
22 | #include <urcu/uatomic.h> | |
23 | ||
24 | /* | |
25 | * These are the value added to the current state depending of the position in | |
26 | * the thread where is either waiting on a poll() or running in the code. | |
27 | */ | |
139ac872 MD |
28 | #define HEALTH_POLL_VALUE (1UL << 0) |
29 | #define HEALTH_CODE_VALUE (1UL << 1) | |
44a5e5eb | 30 | |
139ac872 MD |
31 | #define HEALTH_IS_IN_POLL(x) ((x) & HEALTH_POLL_VALUE) |
32 | ||
33 | enum health_flags { | |
34 | HEALTH_EXIT = (1U << 0), | |
35 | HEALTH_ERROR = (1U << 1), | |
36 | }; | |
44a5e5eb DG |
37 | |
38 | struct health_state { | |
139ac872 MD |
39 | /* |
40 | * last counter is only read and updated by the health_check | |
41 | * thread (single updater). | |
42 | */ | |
43 | unsigned long last; | |
44 | /* | |
45 | * current and flags are updated by multiple threads concurrently. | |
46 | */ | |
47 | unsigned long current; /* progress counter, updated atomically */ | |
48 | enum health_flags flags; /* other flags, updated atomically */ | |
44a5e5eb DG |
49 | }; |
50 | ||
51 | /* Health state counters for the client command thread */ | |
52 | extern struct health_state health_thread_cmd; | |
53 | ||
139ac872 MD |
54 | /* Health state counters for the application management thread */ |
55 | extern struct health_state health_thread_app_manage; | |
56 | ||
44a5e5eb DG |
57 | /* Health state counters for the application registration thread */ |
58 | extern struct health_state health_thread_app_reg; | |
59 | ||
60 | /* Health state counters for the kernel thread */ | |
61 | extern struct health_state health_thread_kernel; | |
62 | ||
63 | /* | |
139ac872 MD |
64 | * Update current counter by 1 to indicate that the thread entered or |
65 | * left a blocking state caused by a poll(). | |
44a5e5eb DG |
66 | */ |
67 | static inline void health_poll_update(struct health_state *state) | |
68 | { | |
69 | assert(state); | |
44a5e5eb DG |
70 | uatomic_add(&state->current, HEALTH_POLL_VALUE); |
71 | } | |
72 | ||
73 | /* | |
139ac872 MD |
74 | * Update current counter by 2 indicates progress in execution of a |
75 | * thread. | |
44a5e5eb DG |
76 | */ |
77 | static inline void health_code_update(struct health_state *state) | |
78 | { | |
79 | assert(state); | |
44a5e5eb DG |
80 | uatomic_add(&state->current, HEALTH_CODE_VALUE); |
81 | } | |
82 | ||
83 | /* | |
139ac872 | 84 | * Set health "exit" flag. |
44a5e5eb | 85 | */ |
139ac872 | 86 | static inline void health_exit(struct health_state *state) |
44a5e5eb DG |
87 | { |
88 | assert(state); | |
139ac872 MD |
89 | uatomic_or(&state->flags, HEALTH_EXIT); |
90 | } | |
44a5e5eb | 91 | |
139ac872 MD |
92 | /* |
93 | * Set health "error" flag. | |
94 | */ | |
95 | static inline void health_error(struct health_state *state) | |
96 | { | |
97 | assert(state); | |
98 | uatomic_or(&state->flags, HEALTH_ERROR); | |
44a5e5eb DG |
99 | } |
100 | ||
101 | /* | |
102 | * Init health state. | |
103 | */ | |
104 | static inline void health_init(struct health_state *state) | |
105 | { | |
106 | assert(state); | |
44a5e5eb | 107 | uatomic_set(&state->last, 0); |
139ac872 MD |
108 | uatomic_set(&state->current, 0); |
109 | uatomic_set(&state->flags, 0); | |
44a5e5eb DG |
110 | } |
111 | ||
112 | int health_check_state(struct health_state *state); | |
113 | ||
114 | #endif /* _HEALTH_H */ |