eglsync.h revision 3464ebd5 
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3 * Copyright 2010 LunarG, Inc.
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27
28
29#ifndef EGLSYNC_INCLUDED
30#define EGLSYNC_INCLUDED
31
32
33#include "egltypedefs.h"
34#include "egldisplay.h"
35
36
37#ifdef EGL_KHR_reusable_sync
38
39
40/**
41 * "Base" class for device driver syncs.
42 */
43struct _egl_sync
44{
45   /* A sync is a display resource */
46   _EGLResource Resource;
47
48   EGLenum Type;
49   EGLenum SyncStatus;
50   EGLenum SyncCondition;
51};
52
53
54PUBLIC EGLBoolean
55_eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
56             const EGLint *attrib_list);
57
58
59extern EGLBoolean
60_eglGetSyncAttribKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
61                     EGLint attribute, EGLint *value);
62
63
64/**
65 * Increment reference count for the sync.
66 */
67static INLINE _EGLSync *
68_eglGetSync(_EGLSync *sync)
69{
70   if (sync)
71      _eglGetResource(&sync->Resource);
72   return sync;
73}
74
75
76/**
77 * Decrement reference count for the sync.
78 */
79static INLINE EGLBoolean
80_eglPutSync(_EGLSync *sync)
81{
82   return (sync) ? _eglPutResource(&sync->Resource) : EGL_FALSE;
83}
84
85
86/**
87 * Link a sync to its display and return the handle of the link.
88 * The handle can be passed to client directly.
89 */
90static INLINE EGLSyncKHR
91_eglLinkSync(_EGLSync *sync)
92{
93   _eglLinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
94   return (EGLSyncKHR) sync;
95}
96
97
98/**
99 * Unlink a linked sync from its display.
100 */
101static INLINE void
102_eglUnlinkSync(_EGLSync *sync)
103{
104   _eglUnlinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
105}
106
107
108/**
109 * Lookup a handle to find the linked sync.
110 * Return NULL if the handle has no corresponding linked sync.
111 */
112static INLINE _EGLSync *
113_eglLookupSync(EGLSyncKHR handle, _EGLDisplay *dpy)
114{
115   _EGLSync *sync = (_EGLSync *) handle;
116   if (!dpy || !_eglCheckResource((void *) sync, _EGL_RESOURCE_SYNC, dpy))
117      sync = NULL;
118   return sync;
119}
120
121
122/**
123 * Return the handle of a linked sync, or EGL_NO_SYNC_KHR.
124 */
125static INLINE EGLSyncKHR
126_eglGetSyncHandle(_EGLSync *sync)
127{
128   _EGLResource *res = (_EGLResource *) sync;
129   return (res && _eglIsResourceLinked(res)) ?
130      (EGLSyncKHR) sync : EGL_NO_SYNC_KHR;
131}
132
133
134#endif /* EGL_KHR_reusable_sync */
135
136
137#endif /* EGLSYNC_INCLUDED */
138