display: Cleanup unused code

CRs-Fixed: 2048735
Change-Id: Ief7f8ae4006ab211272191b66bd4bd854d9098b2

1 files changed, 91 insertions, 0 deletions

diff --git a/sdm/libs/hwc2/hwc_buffer_sync_handler.cpp b/sdm/libs/hwc2/hwc_buffer_sync_handler.cpp
new file mode 100644
index 00000000..784e91b5
--- /dev/null
+++ b/sdm/libs/hwc2/hwc_buffer_sync_handler.cpp
@@ -0,0 +1,91 @@
+/*
+* 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 <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
+