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author | Christian Grothoff <christian@grothoff.org> | 2010-11-05 21:54:44 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2010-11-05 21:54:44 +0000 |
commit | bdc3b54372a92874c2ecb58069eac5bdfe6fcddc (patch) | |
tree | 575c606a8f81c1f0baabad43bf34789023513ee7 /src/include/gnunet_datacache_plugin.h | |
parent | f0963cfb7a694f9a7c7ff28471660242529f00a8 (diff) | |
download | gnunet-bdc3b54372a92874c2ecb58069eac5bdfe6fcddc.tar.gz gnunet-bdc3b54372a92874c2ecb58069eac5bdfe6fcddc.zip |
moving plugin headers
Diffstat (limited to 'src/include/gnunet_datacache_plugin.h')
-rw-r--r-- | src/include/gnunet_datacache_plugin.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/include/gnunet_datacache_plugin.h b/src/include/gnunet_datacache_plugin.h new file mode 100644 index 000000000..6aa9b1d06 --- /dev/null +++ b/src/include/gnunet_datacache_plugin.h | |||
@@ -0,0 +1,158 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet | ||
3 | (C) 2006, 2009 Christian Grothoff (and other contributing authors) | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 2, or (at your | ||
8 | option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
18 | Boston, MA 02111-1307, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file datacache/gnunet_datacache_plugin.h | ||
23 | * @brief API for database backends for the datacache | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #ifndef PLUGIN_DATACACHE_H | ||
27 | #define PLUGIN_DATACACHE_H | ||
28 | |||
29 | #include "gnunet_datacache_lib.h" | ||
30 | |||
31 | #ifdef __cplusplus | ||
32 | extern "C" | ||
33 | { | ||
34 | #if 0 /* keep Emacsens' auto-indent happy */ | ||
35 | } | ||
36 | #endif | ||
37 | #endif | ||
38 | |||
39 | |||
40 | /** | ||
41 | * Function called by plugins to notify the datacache | ||
42 | * about content deletions. | ||
43 | * | ||
44 | * @param cls closure | ||
45 | * @param key key of the content that was deleted | ||
46 | * @param size number of bytes that were made available | ||
47 | */ | ||
48 | typedef void (*GNUNET_DATACACHE_DeleteNotifyCallback)(void *cls, | ||
49 | const GNUNET_HashCode *key, | ||
50 | size_t size); | ||
51 | |||
52 | |||
53 | /** | ||
54 | * The datastore service will pass a pointer to a struct | ||
55 | * of this type as the first and only argument to the | ||
56 | * entry point of each datastore plugin. | ||
57 | */ | ||
58 | struct GNUNET_DATACACHE_PluginEnvironment | ||
59 | { | ||
60 | |||
61 | |||
62 | /** | ||
63 | * Configuration to use. | ||
64 | */ | ||
65 | const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
66 | |||
67 | /** | ||
68 | * Configuration section to use. | ||
69 | */ | ||
70 | const char *section; | ||
71 | |||
72 | /** | ||
73 | * Closure to use for callbacks. | ||
74 | */ | ||
75 | void *cls; | ||
76 | |||
77 | /** | ||
78 | * Function to call whenever the plugin needs to | ||
79 | * discard content that it was asked to store. | ||
80 | */ | ||
81 | GNUNET_DATACACHE_DeleteNotifyCallback delete_notify; | ||
82 | |||
83 | /** | ||
84 | * How much space are we allowed to use? | ||
85 | */ | ||
86 | unsigned long long quota; | ||
87 | |||
88 | }; | ||
89 | |||
90 | |||
91 | /** | ||
92 | * @brief struct returned by the initialization function of the plugin | ||
93 | */ | ||
94 | struct GNUNET_DATACACHE_PluginFunctions { | ||
95 | |||
96 | /** | ||
97 | * Closure to pass to all plugin functions. | ||
98 | */ | ||
99 | void *cls; | ||
100 | |||
101 | /** | ||
102 | * Store an item in the datastore. | ||
103 | * | ||
104 | * @param cls closure (internal context for the plugin) | ||
105 | * @param size number of bytes in data | ||
106 | * @param data data to store | ||
107 | * @param type type of the value | ||
108 | * @param discard_time when to discard the value in any case | ||
109 | * @return 0 on error, number of bytes used otherwise | ||
110 | */ | ||
111 | size_t (*put) (void *cls, | ||
112 | const GNUNET_HashCode * key, | ||
113 | size_t size, | ||
114 | const char *data, | ||
115 | enum GNUNET_BLOCK_Type type, | ||
116 | struct GNUNET_TIME_Absolute discard_time); | ||
117 | |||
118 | |||
119 | /** | ||
120 | * Iterate over the results for a particular key | ||
121 | * in the datastore. | ||
122 | * | ||
123 | * @param cls closure (internal context for the plugin) | ||
124 | * @param key | ||
125 | * @param type entries of which type are relevant? | ||
126 | * @param iter maybe NULL (to just count) | ||
127 | * @param iter_cls closure for iter | ||
128 | * @return the number of results found | ||
129 | */ | ||
130 | unsigned int (*get) (void *cls, | ||
131 | const GNUNET_HashCode * key, | ||
132 | enum GNUNET_BLOCK_Type type, | ||
133 | GNUNET_DATACACHE_Iterator iter, | ||
134 | void *iter_cls); | ||
135 | |||
136 | |||
137 | /** | ||
138 | * Delete the entry with the lowest expiration value | ||
139 | * from the datacache right now. | ||
140 | * | ||
141 | * @param cls closure (internal context for the plugin) | ||
142 | * @return GNUNET_OK on success, GNUNET_SYSERR on error | ||
143 | */ | ||
144 | int (*del) (void *cls); | ||
145 | |||
146 | |||
147 | }; | ||
148 | |||
149 | |||
150 | #if 0 /* keep Emacsens' auto-indent happy */ | ||
151 | { | ||
152 | #endif | ||
153 | #ifdef __cplusplus | ||
154 | } | ||
155 | #endif | ||
156 | |||
157 | /* end of gnunet_datacache_plugin.h */ | ||
158 | #endif | ||