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