| /* |
| * Copyright (c) 2015, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <errno.h> |
| #include <sync/sync.h> |
| #include <utils/constants.h> |
| #include <utils/debug.h> |
| |
| #include "hwc_debugger.h" |
| #include "hwc_buffer_sync_handler.h" |
| |
| #define __CLASS__ "HWCBufferSyncHandler" |
| |
| namespace sdm { |
| |
| DisplayError HWCBufferSyncHandler::SyncWait(int fd) { |
| int error = 0; |
| |
| if (fd >= 0) { |
| error = sync_wait(fd, 1000); |
| if (error < 0) { |
| DLOGE("sync_wait error errno = %d, desc = %s", errno, strerror(errno)); |
| return kErrorTimeOut; |
| } |
| } |
| |
| return kErrorNone; |
| } |
| |
| DisplayError HWCBufferSyncHandler::SyncMerge(int fd1, int fd2, int *merged_fd) { |
| DisplayError error = kErrorNone; |
| |
| // Merge the two fences. In the case where one of the fences is not a |
| // valid fence (e.g. NO_FENCE) merge the one valid fence with itself so |
| // that a new fence with the given name is created. |
| // TODO(user): "SyncMerge"string should be replaced with user-defined string to represent |
| // why it is merged. |
| if (fd1 >= 0 && fd2 >= 0) { |
| *merged_fd = sync_merge("SyncMerge", fd1, fd2); |
| } else if (fd1 >= 0) { |
| *merged_fd = sync_merge("SyncMerge", fd1, fd1); |
| } else if (fd2 >= 0) { |
| *merged_fd = sync_merge("SyncMerge", fd2, fd2); |
| } else { |
| *merged_fd = -1; |
| return kErrorNone; |
| } |
| |
| if (*merged_fd == -1) { |
| DLOGE("Sync merge error! fd1 %d fd2 %d", fd1, fd2); |
| error = kErrorFileDescriptor; |
| } |
| |
| return error; |
| } |
| |
| bool HWCBufferSyncHandler::IsSyncSignaled(int fd) { |
| if (sync_wait(fd, 0) < 0) { |
| return false; |
| } else { |
| return true; |
| } |
| } |
| |
| } // namespace sdm |
| |