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Diffstat (limited to 'include/nvgpu/posix/lock.h')
-rw-r--r-- | include/nvgpu/posix/lock.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/nvgpu/posix/lock.h b/include/nvgpu/posix/lock.h new file mode 100644 index 0000000..82eddd0 --- /dev/null +++ b/include/nvgpu/posix/lock.h | |||
@@ -0,0 +1,69 @@ | |||
1 | /* | ||
2 | * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved. | ||
3 | * | ||
4 | * Permission is hereby granted, free of charge, to any person obtaining a | ||
5 | * copy of this software and associated documentation files (the "Software"), | ||
6 | * to deal in the Software without restriction, including without limitation | ||
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
8 | * and/or sell copies of the Software, and to permit persons to whom the | ||
9 | * Software is furnished to do so, subject to the following conditions: | ||
10 | * | ||
11 | * The above copyright notice and this permission notice shall be included in | ||
12 | * all copies or substantial portions of the Software. | ||
13 | * | ||
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
17 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
19 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
20 | * DEALINGS IN THE SOFTWARE. | ||
21 | */ | ||
22 | |||
23 | #ifndef __NVGPU_POSIX_LOCK_H__ | ||
24 | #define __NVGPU_POSIX_LOCK_H__ | ||
25 | |||
26 | #include <stdlib.h> | ||
27 | |||
28 | #include <pthread.h> | ||
29 | |||
30 | /* | ||
31 | * All locks for posix nvgpu are just pthread locks. There's not a lot of reason | ||
32 | * to have real spinlocks in userspace since we aren't using real HW or running | ||
33 | * perf critical code where a sleep could be devestating. | ||
34 | * | ||
35 | * This could be revisited later, though. | ||
36 | */ | ||
37 | struct __nvgpu_posix_lock { | ||
38 | pthread_mutex_t mutex; | ||
39 | }; | ||
40 | |||
41 | static inline void __nvgpu_posix_lock_acquire(struct __nvgpu_posix_lock *lock) | ||
42 | { | ||
43 | pthread_mutex_lock(&lock->mutex); | ||
44 | } | ||
45 | |||
46 | static inline int __nvgpu_posix_lock_try_acquire( | ||
47 | struct __nvgpu_posix_lock *lock) | ||
48 | { | ||
49 | return pthread_mutex_trylock(&lock->mutex); | ||
50 | } | ||
51 | |||
52 | static inline void __nvgpu_posix_lock_release(struct __nvgpu_posix_lock *lock) | ||
53 | { | ||
54 | pthread_mutex_unlock(&lock->mutex); | ||
55 | } | ||
56 | |||
57 | struct nvgpu_mutex { | ||
58 | struct __nvgpu_posix_lock lock; | ||
59 | }; | ||
60 | |||
61 | struct nvgpu_spinlock { | ||
62 | struct __nvgpu_posix_lock lock; | ||
63 | }; | ||
64 | |||
65 | struct nvgpu_raw_spinlock { | ||
66 | struct __nvgpu_posix_lock lock; | ||
67 | }; | ||
68 | |||
69 | #endif /* NVGPU_LOCK_LINUX_H */ | ||