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  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.  */
  40. struct _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.  
  51. PUBLIC EGLBoolean
  52. _eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
  53.              const EGLint *attrib_list);
  54.  
  55.  
  56. extern 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.  */
  64. static 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.  */
  76. static 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.  */
  87. static 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.  */
  98. static 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.  */
  109. static 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.  */
  122. static 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.