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 "c99_compat.h"
34
35 #include "egltypedefs.h"
36 #include "egldisplay.h"
37
38
39 /**
40 * "Base" class for device driver syncs.
41 */
42 struct _egl_sync
43 {
44 /* A sync is a display resource */
45 _EGLResource Resource;
46
47 EGLenum Type;
48 EGLenum SyncStatus;
49 EGLenum SyncCondition;
50 EGLAttrib CLEvent;
51 EGLint SyncFd;
52 };
53
54
55 extern EGLBoolean
56 _eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
57 const EGLAttrib *attrib_list);
58
59
60 extern EGLBoolean
61 _eglGetSyncAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
62 EGLint attribute, EGLAttrib *value);
63
64
65 /**
66 * Increment reference count for the sync.
67 */
68 static inline _EGLSync *
_eglGetSync(_EGLSync * sync)69 _eglGetSync(_EGLSync *sync)
70 {
71 if (sync)
72 _eglGetResource(&sync->Resource);
73 return sync;
74 }
75
76
77 /**
78 * Decrement reference count for the sync.
79 */
80 static inline EGLBoolean
_eglPutSync(_EGLSync * sync)81 _eglPutSync(_EGLSync *sync)
82 {
83 return (sync) ? _eglPutResource(&sync->Resource) : EGL_FALSE;
84 }
85
86
87 /**
88 * Link a sync to its display and return the handle of the link.
89 * The handle can be passed to client directly.
90 */
91 static inline EGLSync
_eglLinkSync(_EGLSync * sync)92 _eglLinkSync(_EGLSync *sync)
93 {
94 _eglLinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
95 return (EGLSync) sync;
96 }
97
98
99 /**
100 * Unlink a linked sync from its display.
101 */
102 static inline void
_eglUnlinkSync(_EGLSync * sync)103 _eglUnlinkSync(_EGLSync *sync)
104 {
105 _eglUnlinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
106 }
107
108
109 /**
110 * Lookup a handle to find the linked sync.
111 * Return NULL if the handle has no corresponding linked sync.
112 */
113 static inline _EGLSync *
_eglLookupSync(EGLSync handle,_EGLDisplay * dpy)114 _eglLookupSync(EGLSync handle, _EGLDisplay *dpy)
115 {
116 _EGLSync *sync = (_EGLSync *) handle;
117 if (!dpy || !_eglCheckResource((void *) sync, _EGL_RESOURCE_SYNC, dpy))
118 sync = NULL;
119 return sync;
120 }
121
122
123 /**
124 * Return the handle of a linked sync, or EGL_NO_SYNC_KHR.
125 */
126 static inline EGLSync
_eglGetSyncHandle(_EGLSync * sync)127 _eglGetSyncHandle(_EGLSync *sync)
128 {
129 _EGLResource *res = (_EGLResource *) sync;
130 return (res && _eglIsResourceLinked(res)) ?
131 (EGLSync) sync : EGL_NO_SYNC_KHR;
132 }
133
134
135 #endif /* EGLSYNC_INCLUDED */
136