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 EGLint *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       EGLint attr = attrib_list[i++];
  51       EGLint val = attrib_list[i];
  52       EGLint err = EGL_SUCCESS;
  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          return err;
  64       }
  65    }
  66
  67    return EGL_SUCCESS;
  68 }
  69
  70
  71 static EGLint
  72 _eglParseSyncAttribList64(_EGLSync *sync, const EGLAttrib *attrib_list)
  73 {
  74    EGLint i;
  75
  76    if (!attrib_list)
  77       return EGL_SUCCESS;
  78
  79    for (i = 0; attrib_list[i] != EGL_NONE; i++) {
  80       EGLAttrib attr = attrib_list[i++];
  81       EGLAttrib val = attrib_list[i];
  82       EGLint err = EGL_SUCCESS;
  83
  84       switch (attr) {
  85       case EGL_CL_EVENT_HANDLE_KHR:
  86          if (sync->Type == EGL_SYNC_CL_EVENT_KHR) {
  87             sync->CLEvent = val;
  88             break;
  89          }
  90          /* fall through */
  91       default:
  92          (void) val;
  93          err = EGL_BAD_ATTRIBUTE;
  94          break;
  95       }
  96
  97       if (err != EGL_SUCCESS) {
  98          _eglLog(_EGL_DEBUG, "bad sync attribute 0x%" PRIxPTR, attr);
  99          return err;
 100       }
 101    }
 102
 103    return EGL_SUCCESS;
 104 }
 105
 106
 107 EGLBoolean
 108 _eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
 109              const EGLint *attrib_list, const EGLAttrib *attrib_list64)
 110 {
 111    EGLint err;
 112
 113    if (!(type == EGL_SYNC_REUSABLE_KHR && dpy->Extensions.KHR_reusable_sync) &&
 114        !(type == EGL_SYNC_FENCE_KHR && dpy->Extensions.KHR_fence_sync) &&
 115        !(type == EGL_SYNC_CL_EVENT_KHR && dpy->Extensions.KHR_cl_event2 &&
 116          attrib_list64))
 117       return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
 118
 119    _eglInitResource(&sync->Resource, sizeof(*sync), dpy);
 120    sync->Type = type;
 121    sync->SyncStatus = EGL_UNSIGNALED_KHR;
 122
 123    switch (type) {
 124    case EGL_SYNC_CL_EVENT_KHR:
 125       sync->SyncCondition = EGL_SYNC_CL_EVENT_COMPLETE_KHR;
 126       break;
 127    default:
 128       sync->SyncCondition = EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR;
 129    }
 130
 131    if (attrib_list64)
 132       err = _eglParseSyncAttribList64(sync, attrib_list64);
 133    else
 134       err = _eglParseSyncAttribList(sync, attrib_list);
 135
 136    if (err != EGL_SUCCESS)
 137       return _eglError(err, "eglCreateSyncKHR");
 138
 139    if (type == EGL_SYNC_CL_EVENT_KHR && !sync->CLEvent)
 140       return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
 141
 142    return EGL_TRUE;
 143 }
 144
 145
 146 EGLBoolean
 147 _eglGetSyncAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
 148                   EGLint attribute, EGLAttrib *value)
 149 {
 150    switch (attribute) {
 151    case EGL_SYNC_TYPE_KHR:
 152       *value = sync->Type;
 153       break;
 154    case EGL_SYNC_STATUS_KHR:
 155       /* update the sync status */
 156       if (sync->SyncStatus != EGL_SIGNALED_KHR &&
 157           (sync->Type == EGL_SYNC_FENCE_KHR ||
 158            sync->Type == EGL_SYNC_CL_EVENT_KHR ||
 159            sync->Type == EGL_SYNC_REUSABLE_KHR))
 160          drv->API.ClientWaitSyncKHR(drv, dpy, sync, 0, 0);
 161
 162       *value = sync->SyncStatus;
 163       break;
 164    case EGL_SYNC_CONDITION_KHR:
 165       if (sync->Type != EGL_SYNC_FENCE_KHR &&
 166           sync->Type != EGL_SYNC_CL_EVENT_KHR)
 167          return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 168       *value = sync->SyncCondition;
 169       break;
 170    default:
 171       return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 172       break;
 173    }
 174
 175    return EGL_TRUE;
 176 }