Move detached buffer to libui
Move it into libui early so that new modifications towards it can be
coded in the libui style
This CL only moves the file and updates Android.bp with proper
dependencies. Will re-format the coding style in a follow up CL. The
reason behind this is to keep this CL small enough so that the "git
mv" operation will be considered as an renaming rather than a complete
rewrite.
Note that DetachedBuffer is not exposed to VNDK, so that we won't
need to worry about ABI compatibility. Also, it temporarily introduces
some clang warning exceptions, we should be able to remove them very
soon once pdx to binder refactor is done for detached buffer.
Bug: 112010261
Test: atest BufferHubMetadata_test
Change-Id: I63659b9a9b7cb56f30fc2ae8cc5b87977d79b59c
diff --git a/libs/ui/tests/BufferHubMetadata_test.cpp b/libs/ui/tests/BufferHubMetadata_test.cpp
new file mode 100644
index 0000000..4209392
--- /dev/null
+++ b/libs/ui/tests/BufferHubMetadata_test.cpp
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2018 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 <ui/BufferHubMetadata.h>
+
+using android::dvr::BufferHubDefs::IsBufferGained;
+
+namespace android {
+namespace dvr {
+
+constexpr size_t kEmptyUserMetadataSize = 0;
+
+class BufferHubMetadataTest : public ::testing::Test {};
+
+TEST_F(BufferHubMetadataTest, Create_UserMetdataSizeTooBig) {
+ BufferHubMetadata m1 =
+ BufferHubMetadata::Create(std::numeric_limits<uint32_t>::max());
+ EXPECT_FALSE(m1.IsValid());
+}
+
+TEST_F(BufferHubMetadataTest, Create_Success) {
+ BufferHubMetadata m1 = BufferHubMetadata::Create(kEmptyUserMetadataSize);
+ EXPECT_TRUE(m1.IsValid());
+ EXPECT_NE(m1.metadata_header(), nullptr);
+}
+
+TEST_F(BufferHubMetadataTest, Import_Success) {
+ BufferHubMetadata m1 = BufferHubMetadata::Create(kEmptyUserMetadataSize);
+ EXPECT_TRUE(m1.IsValid());
+ EXPECT_NE(m1.metadata_header(), nullptr);
+
+ pdx::LocalHandle h2 = m1.ashmem_handle().Duplicate();
+ EXPECT_TRUE(h2.IsValid());
+
+ BufferHubMetadata m2 = BufferHubMetadata::Import(std::move(h2));
+ EXPECT_FALSE(h2.IsValid());
+ EXPECT_TRUE(m1.IsValid());
+ BufferHubDefs::MetadataHeader* mh1 = m1.metadata_header();
+ EXPECT_NE(mh1, nullptr);
+
+ // TODO(b/111976433): Update this test once BufferHub state machine gets
+ // updated. In the old model, buffer starts in the gained state (i.e.
+ // valued 0). In the new model, buffer states in the released state.
+ EXPECT_TRUE(IsBufferGained(mh1->fence_state.load()));
+
+ EXPECT_TRUE(m2.IsValid());
+ BufferHubDefs::MetadataHeader* mh2 = m2.metadata_header();
+ EXPECT_NE(mh2, nullptr);
+
+ // TODO(b/111976433): Update this test once BufferHub state machine gets
+ // updated. In the old model, buffer starts in the gained state (i.e.
+ // valued 0). In the new model, buffer states in the released state.
+ EXPECT_TRUE(IsBufferGained(mh2->fence_state.load()));
+}
+
+TEST_F(BufferHubMetadataTest, MoveMetadataInvalidatesOldOne) {
+ BufferHubMetadata m1 = BufferHubMetadata::Create(sizeof(int));
+ EXPECT_TRUE(m1.IsValid());
+ EXPECT_NE(m1.metadata_header(), nullptr);
+ EXPECT_TRUE(m1.ashmem_handle().IsValid());
+ EXPECT_EQ(m1.user_metadata_size(), sizeof(int));
+
+ BufferHubMetadata m2 = std::move(m1);
+
+ // After the move, the metadata header (a raw pointer) should be reset in the
+ // older buffer.
+ EXPECT_EQ(m1.metadata_header(), nullptr);
+ EXPECT_NE(m2.metadata_header(), nullptr);
+
+ EXPECT_FALSE(m1.ashmem_handle().IsValid());
+ EXPECT_TRUE(m2.ashmem_handle().IsValid());
+
+ EXPECT_EQ(m1.user_metadata_size(), 0U);
+ EXPECT_EQ(m2.user_metadata_size(), sizeof(int));
+
+ BufferHubMetadata m3{std::move(m2)};
+
+ // After the move, the metadata header (a raw pointer) should be reset in the
+ // older buffer.
+ EXPECT_EQ(m2.metadata_header(), nullptr);
+ EXPECT_NE(m3.metadata_header(), nullptr);
+
+ EXPECT_FALSE(m2.ashmem_handle().IsValid());
+ EXPECT_TRUE(m3.ashmem_handle().IsValid());
+
+ EXPECT_EQ(m2.user_metadata_size(), 0U);
+ EXPECT_EQ(m3.user_metadata_size(), sizeof(int));
+}
+
+} // namespace dvr
+} // namespace android