src/egl/main/eglsync.h

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