ArrayPool.java

package com.bumptech.glide.load.engine.bitmap_recycle;

/**
 * Interface for an array pool that pools arrays of different types.
 */
public interface ArrayPool {
  /**
   * A standard size to use to increase hit rates when the required size isn't defined.
   * Currently 64KB.
   */
  int STANDARD_BUFFER_SIZE_BYTES = 64 * 1024;

  /**
   * Optionally adds the given array of the given type to the pool.
   *
   * <p>Arrays may be ignored, for example if the array is larger than the maximum size of the
   * pool.
   */
  <T> void put(T array, Class<T> arrayClass);

  /**
   * Returns a non-null array of the given type with a length >= to the given size.
   *
   * <p>If an array of the given size isn't in the pool, a new one will be allocated.
   *
   * <p>This class makes no guarantees about the contents of the returned array.
   */
  <T> T get(int size, Class<T> arrayClass);
  /**
   * Clears all arrays from the pool.
   */
  void clearMemory();

  /**
   * Trims the size to the appropriate level.
   *
   * @param level A trim specified in {@link android.content.ComponentCallbacks2}.
   */
  void trimMemory(int level);

}