BenchmarkOperation.java
/*
* Copyright 2022 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.
*/
package androidx.profileinstaller;
import android.content.Context;
import android.os.Build;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import java.io.File;
class BenchmarkOperation {
private BenchmarkOperation() {}
static void dropShaderCache(
@NonNull Context context,
@NonNull ProfileInstallReceiver.ResultDiagnostics callback
) {
File shaderDirectory;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
// shaders started using code cache dir once it was added in N
shaderDirectory = Api24ContextHelper.getDeviceProtectedCodeCacheDir(context);
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// getCodeCacheDir was added in L, but not used by platform for shaders until M
shaderDirectory = Api21ContextHelper.getCodeCacheDir(context);
} else {
shaderDirectory = context.getCacheDir();
}
if (deleteFilesRecursively(shaderDirectory)) {
callback.onResultReceived(ProfileInstaller.RESULT_BENCHMARK_OPERATION_SUCCESS, null);
} else {
callback.onResultReceived(ProfileInstaller.RESULT_BENCHMARK_OPERATION_FAILURE, null);
}
}
/**
* Returns true on success
*
* If hits a failure to access a directory, returns false but keeps going
*/
static boolean deleteFilesRecursively(File file) {
if (file.isDirectory()) {
File[] children = file.listFiles();
if (children == null) {
return false;
}
boolean success = true;
for (File child : children) {
success = deleteFilesRecursively(child) && success;
}
return success;
} else {
//noinspection ResultOfMethodCallIgnored
file.delete();
return true;
}
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private static class Api21ContextHelper {
static File getCodeCacheDir(Context context) {
// Code cache dir added in 21
return context.getCodeCacheDir();
}
}
@RequiresApi(api = Build.VERSION_CODES.N)
private static class Api24ContextHelper {
static File getDeviceProtectedCodeCacheDir(Context context) {
// Code device protected storage added in 24
return context.createDeviceProtectedStorageContext().getCodeCacheDir();
}
}
}