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