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1 /**************************************************************************
2  *
3  * Copyright 2020 Lag Free Games, LLC
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sub license, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25  *
26  **************************************************************************/
27 
28 #ifndef RWLOCK_H
29 #define RWLOCK_H
30 
31 #ifdef _WIN32
32 #include <windows.h>
33 #else
34 #include <pthread.h>
35 #endif
36 
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40 
41 struct u_rwlock
42 {
43 #ifdef _WIN32
44    SRWLOCK rwlock;
45 #else
46    pthread_rwlock_t rwlock;
47 #endif
48 };
49 
u_rwlock_init(struct u_rwlock * rwlock)50 static inline int u_rwlock_init(struct u_rwlock *rwlock)
51 {
52 #ifdef _WIN32
53    InitializeSRWLock(&rwlock->rwlock);
54    return 0;
55 #else
56    return pthread_rwlock_init(&rwlock->rwlock, NULL);
57 #endif
58 }
59 
u_rwlock_destroy(struct u_rwlock * rwlock)60 static inline int u_rwlock_destroy(struct u_rwlock *rwlock)
61 {
62 #ifdef _WIN32
63    return 0;
64 #else
65    return pthread_rwlock_destroy(&rwlock->rwlock);
66 #endif
67 }
68 
u_rwlock_rdlock(struct u_rwlock * rwlock)69 static inline int u_rwlock_rdlock(struct u_rwlock *rwlock)
70 {
71 #ifdef _WIN32
72    AcquireSRWLockShared(&rwlock->rwlock);
73    return 0;
74 #else
75    return pthread_rwlock_rdlock(&rwlock->rwlock);
76 #endif
77 }
78 
u_rwlock_rdunlock(struct u_rwlock * rwlock)79 static inline int u_rwlock_rdunlock(struct u_rwlock *rwlock)
80 {
81 #ifdef _WIN32
82    ReleaseSRWLockShared(&rwlock->rwlock);
83    return 0;
84 #else
85    return pthread_rwlock_unlock(&rwlock->rwlock);
86 #endif
87 }
88 
u_rwlock_wrlock(struct u_rwlock * rwlock)89 static inline int u_rwlock_wrlock(struct u_rwlock *rwlock)
90 {
91 #ifdef _WIN32
92    AcquireSRWLockExclusive(&rwlock->rwlock);
93    return 0;
94 #else
95    return pthread_rwlock_wrlock(&rwlock->rwlock);
96 #endif
97 }
98 
u_rwlock_wrunlock(struct u_rwlock * rwlock)99 static inline int u_rwlock_wrunlock(struct u_rwlock *rwlock)
100 {
101 #ifdef _WIN32
102    ReleaseSRWLockExclusive(&rwlock->rwlock);
103    return 0;
104 #else
105    return pthread_rwlock_unlock(&rwlock->rwlock);
106 #endif
107 }
108 
109 #ifdef __cplusplus
110 }
111 #endif
112 
113 #endif
114