eglsync.c revision 7ec681f3 
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 */
41static 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
85EGLBoolean
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
122EGLBoolean
123_eglGetSyncAttrib(_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         disp->Driver->ClientWaitSyncKHR(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}
156