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/*
* 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
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