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 "egldriver.h"
  34 #include "egllog.h"
  35
  36
  37 /**
  38  * Parse the list of sync attributes and return the proper error code.
  39  */
  40 static EGLint
  41 _eglParseSyncAttribList(_EGLSync *sync, const EGLint *attrib_list)
  42 {
  43    EGLint i, err = EGL_SUCCESS;
  44
  45    if (!attrib_list)
  46       return EGL_SUCCESS;
  47
  48    for (i = 0; attrib_list[i] != EGL_NONE; i++) {
  49       EGLint attr = attrib_list[i++];
  50       EGLint val = attrib_list[i];
  51
  52       switch (attr) {
  53       default:
  54          (void) val;
  55          err = EGL_BAD_ATTRIBUTE;
  56          break;
  57       }
  58
  59       if (err != EGL_SUCCESS) {
  60          _eglLog(_EGL_DEBUG, "bad sync attribute 0x%04x", attr);
  61          break;
  62       }
  63    }
  64
  65    return err;
  66 }
  67
  68
  69 static EGLint
  70 _eglParseSyncAttribList64(_EGLSync *sync, const EGLAttrib *attrib_list)
  71 {
  72    EGLint i, err = EGL_SUCCESS;
  73
  74    if (!attrib_list)
  75       return EGL_SUCCESS;
  76
  77    for (i = 0; attrib_list[i] != EGL_NONE; i++) {
  78       EGLint attr = attrib_list[i++];
  79       EGLint val = attrib_list[i];
  80
  81       switch (attr) {
  82       case EGL_CL_EVENT_HANDLE_KHR:
  83          if (sync->Type == EGL_SYNC_CL_EVENT_KHR) {
  84             sync->CLEvent = val;
  85             break;
  86          }
  87          /* fall through */
  88       default:
  89          (void) val;
  90          err = EGL_BAD_ATTRIBUTE;
  91          break;
  92       }
  93
  94       if (err != EGL_SUCCESS) {
  95          _eglLog(_EGL_DEBUG, "bad sync attribute 0x%04x", attr);
  96          break;
  97       }
  98    }
  99
 100    return err;
 101 }
 102
 103
 104 EGLBoolean
 105 _eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
 106              const EGLint *attrib_list, const EGLAttrib *attrib_list64)
 107 {
 108    EGLint err;
 109
 110    if (!(type == EGL_SYNC_REUSABLE_KHR && dpy->Extensions.KHR_reusable_sync) &&
 111        !(type == EGL_SYNC_FENCE_KHR && dpy->Extensions.KHR_fence_sync) &&
 112        !(type == EGL_SYNC_CL_EVENT_KHR && dpy->Extensions.KHR_cl_event2 &&
 113          attrib_list64))
 114       return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
 115
 116    _eglInitResource(&sync->Resource, sizeof(*sync), dpy);
 117    sync->Type = type;
 118    sync->SyncStatus = EGL_UNSIGNALED_KHR;
 119
 120    switch (type) {
 121    case EGL_SYNC_CL_EVENT_KHR:
 122       sync->SyncCondition = EGL_SYNC_CL_EVENT_COMPLETE_KHR;
 123       break;
 124    default:
 125       sync->SyncCondition = EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR;
 126    }
 127
 128    if (attrib_list64)
 129       err = _eglParseSyncAttribList64(sync, attrib_list64);
 130    else
 131       err = _eglParseSyncAttribList(sync, attrib_list);
 132
 133    if (err != EGL_SUCCESS)
 134       return _eglError(err, "eglCreateSyncKHR");
 135
 136    if (type == EGL_SYNC_CL_EVENT_KHR && !sync->CLEvent)
 137       return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
 138
 139    return EGL_TRUE;
 140 }
 141
 142
 143 EGLBoolean
 144 _eglGetSyncAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
 145                   EGLint attribute, EGLAttrib *value)
 146 {
 147    switch (attribute) {
 148    case EGL_SYNC_TYPE_KHR:
 149       *value = sync->Type;
 150       break;
 151    case EGL_SYNC_STATUS_KHR:
 152       /* update the sync status */
 153       if (sync->SyncStatus != EGL_SIGNALED_KHR &&
 154           (sync->Type == EGL_SYNC_FENCE_KHR ||
 155            sync->Type == EGL_SYNC_CL_EVENT_KHR))
 156          drv->API.ClientWaitSyncKHR(drv, dpy, sync, 0, 0);
 157
 158       *value = sync->SyncStatus;
 159       break;
 160    case EGL_SYNC_CONDITION_KHR:
 161       if (sync->Type != EGL_SYNC_FENCE_KHR &&
 162           sync->Type != EGL_SYNC_CL_EVENT_KHR)
 163          return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 164       *value = sync->SyncCondition;
 165       break;
 166    default:
 167       return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 168       break;
 169    }
 170
 171    return EGL_TRUE;
 172 }