*/
@GwtCompatible
final class Platform {
  private Platform() {}

  /** Returns a thread-local 1024-char array. */
  static char[] charBufferFromThreadLocal() {
    // requireNonNull accommodates Android's @RecentlyNullable annotation on ThreadLocal.get
    return requireNonNull(DEST_TL.get());
  }

  /**
   * A thread-local destination buffer to keep us from creating new buffers. The starting size is

          <item index="1" class="java.lang.String" itemvalue="androidx.annotation.Nullable" />
          <item index="2" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNullable" />
          <item index="3" class="java.lang.String" itemvalue="com.android.annotations.Nullable" />
          <item index="4" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />

   */
  private void aboutToAcquire(CycleDetectingLock lock) {
    if (!lock.isAcquiredByCurrentThread()) {
      // requireNonNull accommodates Android's @RecentlyNullable annotation on ThreadLocal.get
      List<LockGraphNode> acquiredLockList = requireNonNull(acquiredLocks.get());
      LockGraphNode node = lock.getLockGraphNode();
      node.checkAcquiredLocks(policy, acquiredLockList);

   */
  private void aboutToAcquire(CycleDetectingLock lock) {
    if (!lock.isAcquiredByCurrentThread()) {
      // requireNonNull accommodates Android's @RecentlyNullable annotation on ThreadLocal.get
      List<LockGraphNode> acquiredLockList = requireNonNull(acquiredLocks.get());
      LockGraphNode node = lock.getLockGraphNode();
      node.checkAcquiredLocks(policy, acquiredLockList);