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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <gui/DisplayEventReceiver.h>
namespace android::test {
#define CHECK_OFFSET(type, member, expected_offset) \
static_assert((offsetof(type, member) == (expected_offset)))
TEST(DisplayEventStructLayoutTest, TestEventAlignment) {
static_assert(std::is_pod<DisplayEventReceiver::Event::VSync>::value);
CHECK_OFFSET(DisplayEventReceiver::Event, vsync, 24);
CHECK_OFFSET(DisplayEventReceiver::Event, hotplug, 24);
CHECK_OFFSET(DisplayEventReceiver::Event, modeChange, 24);
CHECK_OFFSET(DisplayEventReceiver::Event::Header, type, 0);
CHECK_OFFSET(DisplayEventReceiver::Event::Header, displayId, 8);
CHECK_OFFSET(DisplayEventReceiver::Event::Header, timestamp, 16);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync, count, 0);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync, vsyncData.frameInterval, 8);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync, vsyncData.preferredFrameTimelineIndex, 16);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync, vsyncData.frameTimelines, 24);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync, vsyncData.frameTimelines[0].vsyncId, 24);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync, vsyncData.frameTimelines[0].deadlineTimestamp,
32);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync,
vsyncData.frameTimelines[0].expectedPresentationTime, 40);
// Also test the offsets of the last frame timeline. A loop is not used because the non-const
// index cannot be used in static_assert.
const int lastFrameTimelineOffset = /* Start of array */ 24 +
(VsyncEventData::kFrameTimelinesLength - 1) * /* Size of FrameTimeline */ 24;
CHECK_OFFSET(DisplayEventReceiver::Event::VSync,
vsyncData.frameTimelines[VsyncEventData::kFrameTimelinesLength - 1].vsyncId,
lastFrameTimelineOffset);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync,
vsyncData.frameTimelines[VsyncEventData::kFrameTimelinesLength - 1]
.deadlineTimestamp,
lastFrameTimelineOffset + 8);
CHECK_OFFSET(DisplayEventReceiver::Event::VSync,
vsyncData.frameTimelines[VsyncEventData::kFrameTimelinesLength - 1]
.expectedPresentationTime,
lastFrameTimelineOffset + 16);
CHECK_OFFSET(DisplayEventReceiver::Event::Hotplug, connected, 0);
CHECK_OFFSET(DisplayEventReceiver::Event::ModeChange, modeId, 0);
CHECK_OFFSET(DisplayEventReceiver::Event::ModeChange, vsyncPeriod, 8);
CHECK_OFFSET(DisplayEventReceiver::Event::FrameRateOverride, uid, 0);
CHECK_OFFSET(DisplayEventReceiver::Event::FrameRateOverride, frameRateHz, 8);
}
} // namespace android::test
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