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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