1 /*
2 * Copyright © 2021 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23 #ifndef VK_SEMAPHORE_H
24 #define VK_SEMAPHORE_H
25
26 #include "vk_object.h"
27 #include "vk_sync.h"
28
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32
33 struct vk_sync;
34
35 struct vk_semaphore {
36 struct vk_object_base base;
37
38 /** VkSemaphoreTypeCreateInfo::semaphoreType */
39 VkSemaphoreType type;
40
41 /* Temporary semaphore state.
42 *
43 * A semaphore *may* have temporary state. That state is added to the
44 * semaphore by an import operation and is reset back to NULL when the
45 * semaphore is reset. A semaphore with temporary state cannot be signaled
46 * because the semaphore must already be signaled before the temporary
47 * state can be exported from the semaphore in the other process and
48 * imported here.
49 */
50 struct vk_sync *temporary;
51
52 /** Permanent semaphore state.
53 *
54 * Every semaphore has some form of permanent state.
55 *
56 * This field must be last
57 */
58 alignas(8) struct vk_sync permanent;
59 };
60
61 VK_DEFINE_NONDISP_HANDLE_CASTS(vk_semaphore, base, VkSemaphore,
62 VK_OBJECT_TYPE_SEMAPHORE);
63
64 void vk_semaphore_reset_temporary(struct vk_device *device,
65 struct vk_semaphore *semaphore);
66
67 static inline struct vk_sync *
vk_semaphore_get_active_sync(struct vk_semaphore * semaphore)68 vk_semaphore_get_active_sync(struct vk_semaphore *semaphore)
69 {
70 return semaphore->temporary ? semaphore->temporary : &semaphore->permanent;
71 }
72
73 #ifdef __cplusplus
74 }
75 #endif
76
77 #endif /* VK_SEMAPHORE_H */
78
79