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       case EGL_SYNC_NATIVE_FENCE_FD_ANDROID:
  63          if (sync->Type == EGL_SYNC_NATIVE_FENCE_ANDROID) {
  64             /* we take ownership of the native fd, so no dup(): */
  65             sync->SyncFd = val;
  66          } else {
  67             err = EGL_BAD_ATTRIBUTE;
  68          }
  69          break;
  70       default:
  71          err = EGL_BAD_ATTRIBUTE;
  72          break;
  73       }
  74
  75       if (err != EGL_SUCCESS) {
  76          _eglLog(_EGL_DEBUG, "bad sync attribute 0x%" PRIxPTR, attr);
  77          return err;
  78       }
  79    }
  80
  81    return EGL_SUCCESS;
  82 }
  83
  84
  85 EGLBoolean
  86 _eglInitSync(_EGLSync *sync, _EGLDisplay *disp, EGLenum type,
  87              const EGLAttrib *attrib_list)
  88 {
  89    EGLint err;
  90
  91    _eglInitResource(&sync->Resource, sizeof(*sync), disp);
  92    sync->Type = type;
  93    sync->SyncStatus = EGL_UNSIGNALED_KHR;
  94    sync->SyncFd = EGL_NO_NATIVE_FENCE_FD_ANDROID;
  95
  96    err = _eglParseSyncAttribList(sync, attrib_list);
  97
  98    switch (type) {
  99    case EGL_SYNC_CL_EVENT_KHR:
 100       sync->SyncCondition = EGL_SYNC_CL_EVENT_COMPLETE_KHR;
 101       break;
 102    case EGL_SYNC_NATIVE_FENCE_ANDROID:
 103       if (sync->SyncFd == EGL_NO_NATIVE_FENCE_FD_ANDROID)
 104          sync->SyncCondition = EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR;
 105       else
 106          sync->SyncCondition = EGL_SYNC_NATIVE_FENCE_SIGNALED_ANDROID;
 107       break;
 108    default:
 109       sync->SyncCondition = EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR;
 110    }
 111
 112    if (err != EGL_SUCCESS)
 113       return _eglError(err, "eglCreateSyncKHR");
 114
 115    if (type == EGL_SYNC_CL_EVENT_KHR && !sync->CLEvent)
 116       return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
 117
 118    return EGL_TRUE;
 119 }
 120
 121
 122 EGLBoolean
 123 _eglGetSyncAttrib(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSync *sync,
 124                   EGLint attribute, EGLAttrib *value)
 125 {
 126    switch (attribute) {
 127    case EGL_SYNC_TYPE_KHR:
 128       *value = sync->Type;
 129       break;
 130    case EGL_SYNC_STATUS_KHR:
 131       /* update the sync status */
 132       if (sync->SyncStatus != EGL_SIGNALED_KHR &&
 133           (sync->Type == EGL_SYNC_FENCE_KHR ||
 134            sync->Type == EGL_SYNC_CL_EVENT_KHR ||
 135            sync->Type == EGL_SYNC_REUSABLE_KHR ||
 136            sync->Type == EGL_SYNC_NATIVE_FENCE_ANDROID))
 137          drv->ClientWaitSyncKHR(drv, disp, sync, 0, 0);
 138
 139       *value = sync->SyncStatus;
 140       break;
 141    case EGL_SYNC_CONDITION_KHR:
 142       if (sync->Type != EGL_SYNC_FENCE_KHR &&
 143           sync->Type != EGL_SYNC_CL_EVENT_KHR &&
 144           sync->Type != EGL_SYNC_NATIVE_FENCE_ANDROID)
 145          return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 146       *value = sync->SyncCondition;
 147       break;
 148
 149    default:
 150       return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
 151       break;
 152    }
 153
 154    return EGL_TRUE;
 155 }