[core] Review atomic calls and enable atomicfu compiler. Close #2315

mirai-core-utils/build.gradle.kts

@@ -35,7 +35,6 @@ kotlin {
                 api(`kotlinx-serialization-json`)
                 api(`kotlinx-coroutines-core`)
 
-                implementation(`kotlinx-atomicfu`)
                 implementation(`kotlinx-serialization-protobuf`)
                 implementation(`ktor-io`)
             }

mirai-core-utils/src/commonMain/kotlin/AtomicInteger.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2019-2022 Mamoe Technologies and contributors.
+ *
+ * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
+ * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
+ *
+ * https://github.com/mamoe/mirai/blob/dev/LICENSE
+ */
+
+package net.mamoe.mirai.utils
+
+import kotlinx.atomicfu.atomic
+
+/**
+ * Wraps a [atomic] to allow more complicated usages.
+ */
+@TestOnly
+public class AtomicInteger(
+    value: Int
+) {
+    private val delegate = atomic(value)
+
+    public var value: Int
+        get() = delegate.value
+        set(value) {
+            delegate.value = value
+        }
+
+    public fun compareAndSet(expect: Int, update: Int): Boolean = delegate.compareAndSet(expect, update)
+    public fun getAndIncrement(): Int = delegate.getAndIncrement()
+    public fun incrementAndGet(): Int = delegate.incrementAndGet()
+}
+
+/**
+ * Wraps a [atomic] to allow more complicated usages.
+ */
+@TestOnly
+public class AtomicBoolean(
+    value: Boolean
+) {
+    private val delegate = atomic(value)
+
+    public var value: Boolean
+        get() = delegate.value
+        set(value) {
+            delegate.value = value
+        }
+
+    public fun compareAndSet(expect: Boolean, update: Boolean): Boolean = delegate.compareAndSet(expect, update)
+}