1/*
2* Copyright (c) 2015, The Linux Foundation. All rights reserved.
3*
4* Redistribution and use in source and binary forms, with or without
5* modification, are permitted provided that the following conditions are
6* met:
7*  * Redistributions of source code must retain the above copyright
8*    notice, this list of conditions and the following disclaimer.
9*  * Redistributions in binary form must reproduce the above
10*    copyright notice, this list of conditions and the following
11*    disclaimer in the documentation and/or other materials provided
12*    with the distribution.
13*  * Neither the name of The Linux Foundation nor the names of its
14*    contributors may be used to endorse or promote products derived
15*    from this software without specific prior written permission.
16*
17* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*/
29
30#include <sync/sync.h>
31#include <utils/constants.h>
32#include <utils/debug.h>
33
34#include "hwc_debugger.h"
35#include "hwc_buffer_sync_handler.h"
36
37#define __CLASS__ "HWCBufferSyncHandler"
38
39namespace sdm {
40
41DisplayError HWCBufferSyncHandler::SyncWait(int fd) {
42  int error = 0;
43
44  if (fd >= 0) {
45    error = sync_wait(fd, 1000);
46    if (error < 0) {
47      DLOGE("sync_wait error errno = %d, desc = %s", errno,  strerror(errno));
48      return kErrorTimeOut;
49    }
50  }
51
52  return kErrorNone;
53}
54
55DisplayError HWCBufferSyncHandler::SyncMerge(int fd1, int fd2, int *merged_fd) {
56  DisplayError error = kErrorNone;
57
58  // Merge the two fences.  In the case where one of the fences is not a
59  // valid fence (e.g. NO_FENCE) merge the one valid fence with itself so
60  // that a new fence with the given name is created.
61  // TODO(user): "SyncMerge"string should be replaced with user-defined string to represent
62  // why it is merged.
63  if (fd1 >= 0 && fd2 >= 0) {
64    *merged_fd = sync_merge("SyncMerge", fd1, fd2);
65  } else if (fd1 >= 0) {
66    *merged_fd = sync_merge("SyncMerge", fd1, fd1);
67  } else if (fd2 >= 0) {
68    *merged_fd = sync_merge("SyncMerge", fd2, fd2);
69  } else {
70    DLOGE("Invalid arguments passed");
71    return kErrorParameters;
72  }
73
74  if (*merged_fd == -1) {
75    DLOGE("Sync merge error! fd1 %d fd2 %d", fd1, fd2);
76    error = kErrorFileDescriptor;
77  }
78
79  return error;
80}
81
82bool HWCBufferSyncHandler::IsSyncSignaled(int fd) {
83  if (sync_wait(fd, 0) < 0) {
84    return false;
85  } else {
86    return true;
87  }
88}
89
90}  // namespace sdm
91
92