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a553a5a3 | 1 | |
2 | /* | |
d0e71436 | 3 | * $Id: event.h,v 1.3 2006/09/02 12:20:53 serassio Exp $ |
a553a5a3 | 4 | * |
5 | * | |
6 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
7 | * ---------------------------------------------------------- | |
8 | * | |
9 | * Squid is the result of efforts by numerous individuals from | |
10 | * the Internet community; see the CONTRIBUTORS file for full | |
11 | * details. Many organizations have provided support for Squid's | |
12 | * development; see the SPONSORS file for full details. Squid is | |
13 | * Copyrighted (C) 2001 by the Regents of the University of | |
14 | * California; see the COPYRIGHT file for full details. Squid | |
15 | * incorporates software developed and/or copyrighted by other | |
16 | * sources; see the CREDITS file for full details. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation; either version 2 of the License, or | |
21 | * (at your option) any later version. | |
22 | * | |
23 | * This program is distributed in the hope that it will be useful, | |
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | * GNU General Public License for more details. | |
27 | * | |
28 | * You should have received a copy of the GNU General Public License | |
29 | * along with this program; if not, write to the Free Software | |
30 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
31 | * | |
32 | */ | |
33 | ||
34 | #ifndef SQUID_EVENT_H | |
35 | #define SQUID_EVENT_H | |
36 | ||
37 | #include "squid.h" | |
38 | #include "Array.h" | |
8ff3fa2e | 39 | #include "AsyncEngine.h" |
a553a5a3 | 40 | #include "CompletionDispatcher.h" |
41 | ||
42 | /* forward decls */ | |
43 | ||
44 | class StoreEntry; | |
45 | ||
46 | /* event scheduling facilities - run a callback after a given time period. */ | |
47 | ||
48 | typedef void EVH(void *); | |
49 | ||
50 | extern void eventAdd(const char *name, EVH * func, void *arg, double when, int, bool cbdata=true); | |
51 | SQUIDCEXTERN void eventAddIsh(const char *name, EVH * func, void *arg, double delta_ish, int); | |
52 | SQUIDCEXTERN void eventDelete(EVH * func, void *arg); | |
53 | SQUIDCEXTERN void eventInit(CacheManager &); | |
54 | SQUIDCEXTERN void eventFreeMemory(void); | |
55 | SQUIDCEXTERN int eventFind(EVH *, void *); | |
56 | ||
57 | class ev_entry | |
58 | { | |
59 | ||
60 | public: | |
61 | ev_entry(char const * name, EVH * func, void *arg, double when, int weight, bool cbdata=true); | |
62 | MEMPROXY_CLASS(ev_entry); | |
63 | const char *name; | |
64 | EVH *func; | |
65 | void *arg; | |
66 | double when; | |
67 | ||
68 | int weight; | |
69 | bool cbdata; | |
70 | ||
d0e71436 | 71 | ev_entry *next; |
a553a5a3 | 72 | }; |
73 | ||
74 | MEMPROXY_CLASS_INLINE(ev_entry); | |
75 | ||
76 | class EventDispatcher : public CompletionDispatcher | |
77 | { | |
78 | ||
79 | public: | |
80 | EventDispatcher(); | |
81 | /* add an event to dequeue when dispatch is called */ | |
82 | ||
83 | void add | |
84 | (ev_entry *); | |
85 | ||
86 | /* add an event to be dispatched in the future */ | |
87 | void add | |
88 | (const char *name, EVH * func, void *arg, double when, int, bool cbdata=true); | |
89 | ||
8ff3fa2e | 90 | bool dispatch(); |
a553a5a3 | 91 | |
92 | static EventDispatcher *GetInstance(); | |
93 | ||
94 | private: | |
95 | Vector<ev_entry *> queue; | |
96 | ||
97 | static EventDispatcher _instance; | |
98 | }; | |
99 | ||
8ff3fa2e | 100 | class EventScheduler : public AsyncEngine |
a553a5a3 | 101 | { |
102 | ||
103 | public: | |
104 | /* Create an event scheduler that will hand its ready to run callbacks to | |
8ff3fa2e | 105 | * an EventDispatcher |
106 | * | |
107 | * TODO: add should include a dispatcher to use perhaps? then it would be | |
108 | * more decoupled.. | |
109 | */ | |
a553a5a3 | 110 | EventScheduler(EventDispatcher *); |
111 | ~EventScheduler(); | |
112 | /* cancel a scheduled but not dispatched event */ | |
113 | void cancel(EVH * func, void * arg); | |
114 | /* clean up the used memory in the scheduler */ | |
115 | void clean(); | |
116 | /* how long until the next event ? */ | |
117 | int checkDelay(); | |
118 | /* cache manager output for the event queue */ | |
119 | void dump(StoreEntry *); | |
120 | /* find a scheduled event */ | |
121 | bool find(EVH * func, void * arg); | |
122 | /* schedule a callback function to run in when seconds */ | |
123 | void schedule(const char *name, EVH * func, void *arg, double when, int weight, bool cbdata=true); | |
8ff3fa2e | 124 | int checkEvents(int timeout); |
a553a5a3 | 125 | static EventScheduler *GetInstance(); |
126 | ||
127 | private: | |
128 | static EventScheduler _instance; | |
129 | EventDispatcher * dispatcher; | |
130 | ev_entry * tasks; | |
131 | }; | |
132 | ||
133 | #endif /* SQUID_EVENT_H */ |