1 /**************************************************************************
2 *
3 * Copyright 2010 LunarG, Inc.
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 OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29 #ifndef EGLSYNC_INCLUDED
30 #define EGLSYNC_INCLUDED
31
32
33 #include "egltypedefs.h"
34 #include "egldisplay.h"
35
36
37 /**
38 * "Base" class for device driver syncs.
39 */
40 struct _egl_sync
41 {
42 /* A sync is a display resource */
43 _EGLResource Resource;
44
45 EGLenum Type;
46 EGLenum SyncStatus;
47 EGLenum SyncCondition;
48 EGLAttrib CLEvent;
49 EGLint SyncFd;
50 };
51
52
53 extern EGLBoolean
54 _eglInitSync(_EGLSync *sync, _EGLDisplay *disp, EGLenum type,
55 const EGLAttrib *attrib_list);
56
57
58 extern EGLBoolean
59 _eglGetSyncAttrib(_EGLDisplay *disp, _EGLSync *sync,
60 EGLint attribute, EGLAttrib *value);
61
62
63 /**
64 * Increment reference count for the sync.
65 */
66 static inline _EGLSync *
_eglGetSync(_EGLSync * sync)67 _eglGetSync(_EGLSync *sync)
68 {
69 if (sync)
70 _eglGetResource(&sync->Resource);
71 return sync;
72 }
73
74
75 /**
76 * Decrement reference count for the sync.
77 */
78 static inline EGLBoolean
_eglPutSync(_EGLSync * sync)79 _eglPutSync(_EGLSync *sync)
80 {
81 return (sync) ? _eglPutResource(&sync->Resource) : EGL_FALSE;
82 }
83
84
85 /**
86 * Link a sync to its display and return the handle of the link.
87 * The handle can be passed to client directly.
88 */
89 static inline EGLSync
_eglLinkSync(_EGLSync * sync)90 _eglLinkSync(_EGLSync *sync)
91 {
92 _eglLinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
93 return (EGLSync) sync;
94 }
95
96
97 /**
98 * Unlink a linked sync from its display.
99 */
100 static inline void
_eglUnlinkSync(_EGLSync * sync)101 _eglUnlinkSync(_EGLSync *sync)
102 {
103 _eglUnlinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
104 }
105
106
107 /**
108 * Lookup a handle to find the linked sync.
109 * Return NULL if the handle has no corresponding linked sync.
110 */
111 static inline _EGLSync *
_eglLookupSync(EGLSync handle,_EGLDisplay * disp)112 _eglLookupSync(EGLSync handle, _EGLDisplay *disp)
113 {
114 _EGLSync *sync = (_EGLSync *) handle;
115 if (!disp || !_eglCheckResource((void *) sync, _EGL_RESOURCE_SYNC, disp))
116 sync = NULL;
117 return sync;
118 }
119
120
121 /**
122 * Return the handle of a linked sync, or EGL_NO_SYNC_KHR.
123 */
124 static inline EGLSync
_eglGetSyncHandle(_EGLSync * sync)125 _eglGetSyncHandle(_EGLSync *sync)
126 {
127 _EGLResource *res = (_EGLResource *) sync;
128 return (res && _eglIsResourceLinked(res)) ?
129 (EGLSync) sync : EGL_NO_SYNC_KHR;
130 }
131
132
133 #endif /* EGLSYNC_INCLUDED */
134