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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 *dpy, EGLenum type,
     57              const EGLAttrib *attrib_list);
     58 
     59 
     60 extern EGLBoolean
     61 _eglGetSyncAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _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 *dpy)
    115 {
    116    _EGLSync *sync = (_EGLSync *) handle;
    117    if (!dpy || !_eglCheckResource((void *) sync, _EGL_RESOURCE_SYNC, dpy))
    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 */
    136