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 <inttypes.h>
  30 #include <string.h>
  31
  32 #include "eglsync.h"
  33 #include "eglcurrent.h"
  34 #include "egldriver.h"
  35 #include "egllog.h"
  36
  37
  38 /**
  39  * Parse the list of sync attributes and return the proper error code.
  40  */
  41 static EGLint
  42 _eglParseSyncAttribList(_EGLSync *sync, const EGLAttrib *attrib_list)
  43 {
  44    EGLint i;
  45
  46    if (!attrib_list)
  47       return EGL_SUCCESS;
  48
  49    for (i = 0; attrib_list[i] != EGL_NONE; i++) {
  50       EGLAttrib attr = attrib_list[i++];
  51       EGLAttrib val = attrib_list[i];
  52       EGLint err = EGL_SUCCESS;
  53
  54       switch (attr) {
  55       case EGL_CL_EVENT_HANDLE_KHR:
  56          if (sync->Type == EGL_SYNC_CL_EVENT_KHR) {
  57             sync->CLEvent = val;
  58          } else {
  59             err = EGL_BAD_ATTRIBUTE;
  60          }
  61          break;
  62       default:
  63          err = EGL_BAD_ATTRIBUTE;
  64          break;
  65       }
  66
  67       if (err != EGL_SUCCESS) {
  68          _eglLog(_EGL_DEBUG, "bad sync attribute 0x%" PRIxPTR, attr);
  69          return err;
  70       }
  71    }
  72
  73    return EGL_SUCCESS;
  74 }
  75
  76
  77 EGLBoolean
  78 _eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
  79              const EGLAttrib *attrib_list)
  80 {
  81    EGLint err;
  82
  83    _eglInitResource(&sync->Resource, sizeof(*sync), dpy);
  84    sync->Type = type;
  85    sync->SyncStatus = EGL_UNSIGNALED_KHR;
  86
  87    err = _eglParseSyncAttribList(sync, attrib_list);
  88
  89    switch (type) {
  90    case EGL_SYNC_CL_EVENT_KHR:
  91       sync->SyncCondition = EGL_SYNC_CL_EVENT_COMPLETE_KHR;
  92       break;
  93    default:
  94       sync->SyncCondition = EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR;
  95    }
  96
  97    if (err != EGL_SUCCESS)
  98       return _eglError(err, "eglCreateSyncKHR");
  99
 100    if (type == EGL_SYNC_CL_EVENT_KHR && !sync->CLEvent)
 101       return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
 102
 103    return EGL_TRUE;
 104 }
 105
 106
 107 EGLBoolean
 108 _eglGetSyncAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
 109                   EGLint attribute, EGLAttrib *value)
 110 {
 111    switch (attribute) {
 112    case EGL_SYNC_TYPE_KHR:
 113       *value = sync->Type;
 114       break;
 115    case EGL_SYNC_STATUS_KHR:
 116       /* update the sync status */
 117       if (sync->SyncStatus != EGL_SIGNALED_KHR &&
 118           (sync->Type == EGL_SYNC_FENCE_KHR ||
 119            sync->Type == EGL_SYNC_CL_EVENT_KHR ||
 120            sync->Type == EGL_SYNC_REUSABLE_KHR))
 121          drv->API.ClientWaitSyncKHR(drv, dpy, sync, 0, 0);
 122
 123       *value = sync->SyncStatus;
 124       break;
 125    case EGL_SYNC_CONDITION_KHR:
 126       if (sync->Type != EGL_SYNC_FENCE_KHR &&
 127           sync->Type != EGL_SYNC_CL_EVENT_KHR)
 128          return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 129       *value = sync->SyncCondition;
 130       break;
 131    default:
 132       return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 133       break;
 134    }
 135
 136    return EGL_TRUE;
 137 }