eglsync.c revision 3464ebd5 
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#ifdef EGL_KHR_reusable_sync
37
38
39/**
40 * Parse the list of sync attributes and return the proper error code.
41 */
42static EGLint
43_eglParseSyncAttribList(_EGLSync *sync, const EGLint *attrib_list)
44{
45   EGLint i, err = EGL_SUCCESS;
46
47   if (!attrib_list)
48      return EGL_SUCCESS;
49
50   for (i = 0; attrib_list[i] != EGL_NONE; i++) {
51      EGLint attr = attrib_list[i++];
52      EGLint val = attrib_list[i];
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         break;
64      }
65   }
66
67   return err;
68}
69
70
71EGLBoolean
72_eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
73             const EGLint *attrib_list)
74{
75   EGLint err;
76
77   if (!(type == EGL_SYNC_REUSABLE_KHR && dpy->Extensions.KHR_reusable_sync) &&
78       !(type == EGL_SYNC_FENCE_KHR && dpy->Extensions.KHR_fence_sync))
79      return _eglError(EGL_BAD_ATTRIBUTE, "eglCreateSyncKHR");
80
81   _eglInitResource(&sync->Resource, sizeof(*sync), dpy);
82   sync->Type = type;
83   sync->SyncStatus = EGL_UNSIGNALED_KHR;
84   sync->SyncCondition = EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR;
85
86   err = _eglParseSyncAttribList(sync, attrib_list);
87   if (err != EGL_SUCCESS)
88      return _eglError(err, "eglCreateSyncKHR");
89
90   return EGL_TRUE;
91}
92
93
94EGLBoolean
95_eglGetSyncAttribKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
96                     EGLint attribute, EGLint *value)
97{
98   if (!value)
99      return _eglError(EGL_BAD_PARAMETER, "eglGetConfigs");
100
101   switch (attribute) {
102   case EGL_SYNC_TYPE_KHR:
103      *value = sync->Type;
104      break;
105   case EGL_SYNC_STATUS_KHR:
106      *value = sync->SyncStatus;
107      break;
108   case EGL_SYNC_CONDITION_KHR:
109      if (sync->Type != EGL_SYNC_FENCE_KHR)
110         return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
111      *value = sync->SyncCondition;
112      break;
113   default:
114      return _eglError(EGL_BAD_ATTRIBUTE, "eglGetSyncAttribKHR");
115      break;
116   }
117
118   return EGL_TRUE;
119}
120
121
122#endif /* EGL_KHR_reusable_sync */
123