"Java8ApiChecker",
    // This method is a helper, which we call from a `finally` block, as recommended.
    "ReachabilityFenceUsage",
  })
  static void reachabilityFence(@Nullable Object o) {
    if (IS_REACHABILITY_FENCE_METHOD_USABLE) {
      Reference.reachabilityFence(o);
    }
  }

  private static final boolean IS_REACHABILITY_FENCE_METHOD_USABLE =
      computeIsReachabilityFenceMethodUsable();

    "Java8ApiChecker",
    // This method is a helper, which we call from a `finally` block, as recommended.
    "ReachabilityFenceUsage",
  })
  static void reachabilityFence(@Nullable Object o) {
    if (IS_REACHABILITY_FENCE_METHOD_USABLE) {
      Reference.reachabilityFence(o);
    }
  }

  private static final boolean IS_REACHABILITY_FENCE_METHOD_USABLE =
      computeIsReachabilityFenceMethodUsable();

      })
      @Override
      void reachabilityFence(@Nullable Object o) {
        if (IS_REACHABILITY_FENCE_METHOD_USABLE) {
          Reference.reachabilityFence(o);
        }
      }
    },
    /** No-op implementation used under J2ObjC (if ClosingFuture even has J2ObjC users). */
    NO_OP_CALLER {
      @Override
      void reachabilityFence(@Nullable Object o) {}
    };

 * limitations under the License.
 */

package com.google.common.io;

import static com.google.common.base.StandardSystemProperty.OS_NAME;
import static com.google.common.io.FileBackedOutputStream.reachabilityFence;
import static com.google.common.primitives.Bytes.concat;
import static com.google.common.testing.GcFinalization.awaitClear;
import static com.google.common.testing.GcFinalization.awaitDone;