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
   8  * "Software"), to deal in the Software without restriction, including
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  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
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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    EGLAttrib CLEvent;
  51    EGLint SyncFd;
  52 };
  53
  54
  55 extern EGLBoolean
  56 _eglInitSync(_EGLSync *sync, _EGLDisplay *disp, EGLenum type,
  57              const EGLAttrib *attrib_list);
  58
  59
  60 extern EGLBoolean
  61 _eglGetSyncAttrib(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSync *sync,
  62                   EGLint attribute, EGLAttrib *value);
  63
  64
  65 /**
  66  * Increment reference count for the sync.
  67  */
  68 static 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  */
  80 static 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  */
  91 static 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  */
 102 static 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  */
 113 static inline _EGLSync *
 114 _eglLookupSync(EGLSync handle, _EGLDisplay *disp)
 115 {
 116    _EGLSync *sync = (_EGLSync *) handle;
 117    if (!disp || !_eglCheckResource((void *) sync, _EGL_RESOURCE_SYNC, disp))
 118       sync = NULL;
 119    return sync;
 120 }
 121
 122
 123 /**
 124  * Return the handle of a linked sync, or EGL_NO_SYNC_KHR.
 125  */
 126 static 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 */