rocksdb/java/rocksjni/clock_cache.cc

// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// This file implements the "bridge" between Java and C++ for
// rocksdb::ClockCache.

#include <jni.h>

#include "cache/clock_cache.h"
#include "include/org_rocksdb_ClockCache.h"

/*
 * Class:     org_rocksdb_ClockCache
 * Method:    newClockCache
 * Signature: (JIZ)J
 */
jlong Java_org_rocksdb_ClockCache_newClockCache(
    JNIEnv* env, jclass jcls, jlong jcapacity, jint jnum_shard_bits,
    jboolean jstrict_capacity_limit) {
  auto* sptr_clock_cache =
      new std::shared_ptr<rocksdb::Cache>(rocksdb::NewClockCache(
          static_cast<size_t>(jcapacity),
          static_cast<int>(jnum_shard_bits),
          static_cast<bool>(jstrict_capacity_limit)));
  return reinterpret_cast<jlong>(sptr_clock_cache);
}

/*
 * Class:     org_rocksdb_ClockCache
 * Method:    disposeInternal
 * Signature: (J)V
 */
void Java_org_rocksdb_ClockCache_disposeInternal(
    JNIEnv* env, jobject jobj, jlong jhandle) {
  auto* sptr_clock_cache =
      reinterpret_cast<std::shared_ptr<rocksdb::Cache> *>(jhandle);
  delete sptr_clock_cache;  // delete std::shared_ptr
}