libraries/flicker/src/com/android/server/wm/traces/common/Cache.kt

/*
 * Copyright (C) 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 com.android.server.wm.traces.common

import kotlin.js.JsName

object Cache {
    @JsName("cache") private val cache = mutableMapOf<Any, Any>()

    @JsName("get")
    fun <T : Any> get(element: T): T {
        return cache.getOrPut(element) { element } as T
    }

    @JsName("clear")
    fun clear() {
        cache.clear()
    }
}

@JsName("withCache")
inline fun <reified T : Any> withCache(newInstancePredicate: () -> T): T =
    Cache.get(newInstancePredicate())