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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