1 /*===========================================================================
2 *
3 *                            PUBLIC DOMAIN NOTICE
4 *               National Center for Biotechnology Information
5 *
6 *  This software/database is a "United States Government Work" under the
7 *  terms of the United States Copyright Act.  It was written as part of
8 *  the author's official duties as a United States Government employee and
9 *  thus cannot be copyrighted.  This software/database is freely available
10 *  to the public for use. The National Library of Medicine and the U.S.
11 *  Government have not placed any restriction on its use or reproduction.
12 *
13 *  Although all reasonable efforts have been taken to ensure the accuracy
14 *  and reliability of the software and data, the NLM and the U.S.
15 *  Government do not and cannot warrant the performance or results that
16 *  may be obtained by using this software or data. The NLM and the U.S.
17 *  Government disclaim all warranties, express or implied, including
18 *  warranties of performance, merchantability or fitness for any particular
19 *  purpose.
20 *
21 *  Please cite the author in any work or product based on this material.
22 *
23 * ===========================================================================
24 *
25 */
26 
27 #ifndef _h_syslock_priv_
28 #define _h_syslock_priv_
29 
30 #include <pthread.h>
31 
32 #ifndef _h_klib_defs_
33 #include <klib/defs.h>
34 #endif
35 
36 #ifndef _h_atomic32_
37 #include <atomic32.h>
38 #endif
39 
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43 
44 /*--------------------------------------------------------------------------
45  * KLock
46  *  a POSIX-style mutual exclusion lock
47  */
48 struct KLock
49 {
50     pthread_mutex_t mutex;
51     atomic32_t refcount;
52 };
53 
54 /*--------------------------------------------------------------------------
55  * KTimedLock
56  *  a POSIX-style mutual exclusion lock
57  *  with some facilities for timed operations
58  */
59 struct KTimedLock
60 {
61     pthread_mutex_t mutex;
62     pthread_mutex_t cond_lock;
63     pthread_cond_t cond;
64     uint32_t waiters;
65     atomic32_t refcount;
66 };
67 
68 #ifdef __cplusplus
69 }
70 #endif
71 
72 #endif /* _h_syslock_priv_ */
73