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Member "mesa-20.1.8/src/egl/main/eglsync.h" (16 Sep 2020, 3396 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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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 "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(_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 */