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 */
42struct _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
55extern EGLBoolean
56_eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
57             const EGLAttrib *attrib_list);
58
59
60extern 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 */
68static inline _EGLSync *
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 */
80static inline EGLBoolean
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 */
91static inline EGLSync
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 */
102static inline void
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 */
113static inline _EGLSync *
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 */
126static inline EGLSync
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