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 #ifndef EGLSYNC_INCLUDED
29 #define EGLSYNC_INCLUDED
30
31 #include "egldisplay.h"
32 #include "egltypedefs.h"
33
34 /**
35 * "Base" class for device driver syncs.
36 */
37 struct _egl_sync {
38 /* A sync is a display resource */
39 _EGLResource Resource;
40
41 EGLenum Type;
42 EGLenum SyncStatus;
43 EGLenum SyncCondition;
44 EGLAttrib CLEvent;
45 EGLint SyncFd;
46 };
47
48 extern EGLBoolean
49 _eglInitSync(_EGLSync *sync, _EGLDisplay *disp, EGLenum type,
50 const EGLAttrib *attrib_list);
51
52 extern EGLBoolean
53 _eglGetSyncAttrib(_EGLDisplay *disp, _EGLSync *sync, EGLint attribute,
54 EGLAttrib *value);
55
56 /**
57 * Increment reference count for the sync.
58 */
59 static inline _EGLSync *
_eglGetSync(_EGLSync * sync)60 _eglGetSync(_EGLSync *sync)
61 {
62 if (sync)
63 _eglGetResource(&sync->Resource);
64 return sync;
65 }
66
67 /**
68 * Decrement reference count for the sync.
69 */
70 static inline EGLBoolean
_eglPutSync(_EGLSync * sync)71 _eglPutSync(_EGLSync *sync)
72 {
73 return (sync) ? _eglPutResource(&sync->Resource) : EGL_FALSE;
74 }
75
76 /**
77 * Link a sync to its display and return the handle of the link.
78 * The handle can be passed to client directly.
79 */
80 static inline EGLSync
_eglLinkSync(_EGLSync * sync)81 _eglLinkSync(_EGLSync *sync)
82 {
83 _eglLinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
84 return (EGLSync)sync;
85 }
86
87 /**
88 * Unlink a linked sync from its display.
89 */
90 static inline void
_eglUnlinkSync(_EGLSync * sync)91 _eglUnlinkSync(_EGLSync *sync)
92 {
93 _eglUnlinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
94 }
95
96 /**
97 * Lookup a handle to find the linked sync.
98 * Return NULL if the handle has no corresponding linked sync.
99 */
100 static inline _EGLSync *
_eglLookupSync(EGLSync handle,_EGLDisplay * disp)101 _eglLookupSync(EGLSync handle, _EGLDisplay *disp)
102 {
103 _EGLSync *sync = (_EGLSync *)handle;
104 if (!disp || !_eglCheckResource((void *)sync, _EGL_RESOURCE_SYNC, disp))
105 sync = NULL;
106 return sync;
107 }
108
109 /**
110 * Return the handle of a linked sync, or EGL_NO_SYNC_KHR.
111 */
112 static inline EGLSync
_eglGetSyncHandle(_EGLSync * sync)113 _eglGetSyncHandle(_EGLSync *sync)
114 {
115 _EGLResource *res = (_EGLResource *)sync;
116 return (res && _eglIsResourceLinked(res)) ? (EGLSync)sync : EGL_NO_SYNC_KHR;
117 }
118
119 #endif /* EGLSYNC_INCLUDED */
120