diff options
author | Sree Harsha Totakura <totakura@in.tum.de> | 2012-04-25 10:02:51 +0000 |
---|---|---|
committer | Sree Harsha Totakura <totakura@in.tum.de> | 2012-04-25 10:02:51 +0000 |
commit | 9c4f5c8f1b481103f871c20bb568ff7d1911cb10 (patch) | |
tree | 8693254f333fac83b894c73efa161534d2fdcac3 /src/include/gnunet_lockmanager_service.h | |
parent | 0b9d917f4c291daae72b20c61b1dbbefe6ea1ce3 (diff) | |
download | gnunet-9c4f5c8f1b481103f871c20bb568ff7d1911cb10.tar.gz gnunet-9c4f5c8f1b481103f871c20bb568ff7d1911cb10.zip |
-added interface for lockmanager
Diffstat (limited to 'src/include/gnunet_lockmanager_service.h')
-rw-r--r-- | src/include/gnunet_lockmanager_service.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/include/gnunet_lockmanager_service.h b/src/include/gnunet_lockmanager_service.h new file mode 100644 index 000000000..f2952a742 --- /dev/null +++ b/src/include/gnunet_lockmanager_service.h | |||
@@ -0,0 +1,139 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2012 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 include/gnunet_lockmanager_service.h | ||
23 | * @brief API for the lockmanger service | ||
24 | * @author Sree Harsha Totakura | ||
25 | */ | ||
26 | |||
27 | #ifndef GNUNET_LOCKMANAGER_SERVICE_H | ||
28 | #define GNUNET_LOCKMANAGER_SERVICE_H | ||
29 | |||
30 | #ifdef __cplusplus | ||
31 | extern "C" | ||
32 | { | ||
33 | #if 0 /* keep Emacsens' auto-indent happy */ | ||
34 | } | ||
35 | #endif | ||
36 | #endif | ||
37 | |||
38 | /** | ||
39 | * Opaque handle for the lockmanager service | ||
40 | */ | ||
41 | struct GNUNET_LOCKMANAGER_Handle; | ||
42 | |||
43 | |||
44 | /** | ||
45 | * Connect to the lockmanager service | ||
46 | * | ||
47 | * @param cfg the configuration to use | ||
48 | * | ||
49 | * @param domain_name the name of the locking domain. If the locking domain | ||
50 | * isn't existing in the service it will be created. Clients who want | ||
51 | * to share locks must use the same name for the locking domain | ||
52 | * | ||
53 | * @return upon success the handle to the service; NULL upon error | ||
54 | */ | ||
55 | struct GNUNET_LOCKMANAGER_Handle * | ||
56 | GNUNET_LOCKMANAGER_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
57 | const char *domain_name); | ||
58 | |||
59 | |||
60 | /** | ||
61 | * Disconnect from the lockmanager service | ||
62 | * | ||
63 | * @param handle the handle to the lockmanager service | ||
64 | */ | ||
65 | void | ||
66 | GNUNET_LOCKMANAGER_disconnect (struct GNUNET_LOCKMANAGER_Handle *handle); | ||
67 | |||
68 | |||
69 | /** | ||
70 | * This callback will be called after a locking operation has been | ||
71 | * attempted. This callback will not be called when the LockingRequest has been | ||
72 | * cancelled. | ||
73 | * | ||
74 | * @param cls the closure from GNUNET_LOCKMANAGER_lock call | ||
75 | * @param lock the lock for which has been locked successfully | ||
76 | */ | ||
77 | typedef void (*GNUNET_LOCKMANAGER_CompletionCallback) (void *cls, | ||
78 | unsigned int lock); | ||
79 | |||
80 | |||
81 | /** | ||
82 | * Opaque handle to locking request | ||
83 | */ | ||
84 | struct GNUNET_LOCKMANAGER_LockingRequest; | ||
85 | |||
86 | |||
87 | /** | ||
88 | * Tries to lock the given lock | ||
89 | * | ||
90 | * @param handle the handle to the lockmanager service | ||
91 | * @param lock which lock to lock | ||
92 | * @param completion_cb the callback to be called when locking is successful | ||
93 | * @param completion_cb_cls the closure to the above callback | ||
94 | * | ||
95 | * @return the locking request handle for this request. It will be invalidated | ||
96 | * when completion_cb is called. | ||
97 | */ | ||
98 | struct GNUNET_LOCKMANAGER_LockingRequest * | ||
99 | GNUNET_LOCKMANAGER_try_lock (struct GNUNET_LOCKMANAGER_Handle *handle, | ||
100 | unsigned int lock, | ||
101 | GNUNET_LOCKMANAGER_CompletionCallback | ||
102 | completion_cb, | ||
103 | void *completion_cb_cls); | ||
104 | |||
105 | |||
106 | /** | ||
107 | * Function to cancel the locking request generated by | ||
108 | * GNUNET_LOCKMANAGER_try_lock. This should be used on a LockingRequest before | ||
109 | * the completion_cb for the associated lock is called. | ||
110 | * | ||
111 | * @param request the LockingRequest to cancel | ||
112 | */ | ||
113 | void | ||
114 | GNUNET_LOCKMANAGER_cancel_request (struct GNUNET_LOCKMANAGER_LockingRequest | ||
115 | *request); | ||
116 | |||
117 | |||
118 | /** | ||
119 | * Unlocks a lock which was locked by us. It does nothing when called on a lock | ||
120 | * which wasn't locked or was locked by someone else. | ||
121 | * | ||
122 | * @param handle the handle to the lockmanager service | ||
123 | * @param lock which lock to unlock | ||
124 | */ | ||
125 | void | ||
126 | GNUNET_LOCKMANAGER_unlock (const struct GNUNET_LOCKMANAGER_Handle *handle, | ||
127 | unsigned int lock); | ||
128 | |||
129 | |||
130 | #if 0 /* keep Emacsens' auto-indent happy */ | ||
131 | { | ||
132 | #endif | ||
133 | #ifdef __cplusplus | ||
134 | } | ||
135 | #endif | ||
136 | |||
137 | /* ifndef GNUNET_LOCKMANAGER_SERVICE_H */ | ||
138 | #endif | ||
139 | /* end of gnunet_lockmanager_service.h */ | ||