src/egl/main/eglsync.c

   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 #include <string.h>
  30
  31 #include "eglsync.h"
  32 #include "eglcurrent.h"
  33 #include "egllog.h"
  34
  35
  36 #ifdef EGL_KHR_reusable_sync
  37
  38
  39 /**
  40  * Parse the list of sync attributes and return the proper error code.
  41  */
  42 static EGLint
  43 _eglParseSyncAttribList(_EGLSync *sync, const EGLint *attrib_list)
  44 {
  45    EGLint i, err = EGL_SUCCESS;
  46
  47    if (!attrib_list)
  48       return EGL_SUCCESS;
  49
  50    for (i = 0; attrib_list[i] != EGL_NONE; i++) {
  51       EGLint attr = attrib_list[i++];
  52       EGLint val = attrib_list[i];
  53
  54       switch (attr) {
  55       default:
  56          (void) val;
  57          err = EGL_BAD_ATTRIBUTE;
  58          break;
  59       }
  60
  61       if (err != EGL_SUCCESS) {
  62          _eglLog(_EGL_DEBUG, "bad sync attribute 0x%04x", attr);
  63          break;
  64       }
  65    }
  66
  67    return err;
  68 }
  69
  70
  71 EGLBoolean
  72 _eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
  73              const EGLint *attrib_list)
  74 {
  75    EGLint err;
  76
  77    if (!(type == EGL_SYNC_REUSABLE_KHR && dpy->Extensions.KHR_reusable_sync) &&
  78        !(type == EGL_SYNC_FENCE_KHR && dpy->Extensions.KHR_fence_sync))
  79       return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
  80
  81    _eglInitResource(&sync->Resource, sizeof(*sync), dpy);
  82    sync->Type = type;
  83    sync->SyncStatus = EGL_UNSIGNALED_KHR;
  84    sync->SyncCondition = EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR;
  85
  86    err = _eglParseSyncAttribList(sync, attrib_list);
  87    if (err != EGL_SUCCESS)
  88       return _eglError(err, "eglCreateSyncKHR");
  89
  90    return EGL_TRUE;
  91 }
  92
  93
  94 EGLBoolean
  95 _eglGetSyncAttribKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
  96                      EGLint attribute, EGLint *value)
  97 {
  98    if (!value)
  99       return _eglError(EGL_BAD_PARAMETER, "eglGetConfigs");
 100
 101    switch (attribute) {
 102    case EGL_SYNC_TYPE_KHR:
 103       *value = sync->Type;
 104       break;
 105    case EGL_SYNC_STATUS_KHR:
 106       *value = sync->SyncStatus;
 107       break;
 108    case EGL_SYNC_CONDITION_KHR:
 109       if (sync->Type != EGL_SYNC_FENCE_KHR)
 110          return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 111       *value = sync->SyncCondition;
 112       break;
 113    default:
 114       return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 115       break;
 116    }
 117
 118    return EGL_TRUE;
 119 }
 120
 121
 122 #endif /* EGL_KHR_reusable_sync */