JvmSynchronizationHelper.kt

/*
 * Copyright 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.
 */

package androidx.compose.ui.util

import kotlin.contracts.ExperimentalContracts
import kotlin.contracts.InvocationKind
import kotlin.contracts.contract

/**
 * [kotlin.synchronized][synchronized] is deprecated, and the build fails if we use
 * [kotlin.synchronized][synchronized] along with the IR compiler. As a workaround, we have this
 * function here, which is in a module that doesn't use the IR Compiler.
 */
@OptIn(ExperimentalContracts::class)
fun <T> synchronized(lock: Any, block: () -> T): T {
    contract {
        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
    }
    return kotlin.synchronized(lock, block)
}