rocksdb/java/rocksjni/lru_cache.cc

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// 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::LRUCache.
#include <jni.h>
#include "include/org_rocksdb_LRUCache.h"
#include "util/lru_cache.h"
/*
* Class: org_rocksdb_LRUCache
* Method: newLRUCache
* Signature: (JIZD)J
*/
jlong Java_org_rocksdb_LRUCache_newLRUCache(
JNIEnv* env, jclass jcls, jlong jcapacity, jint jnum_shard_bits,
jboolean jstrict_capacity_limit, jdouble jhigh_pri_pool_ratio) {
auto* sptr_lru_cache =
new std::shared_ptr<rocksdb::Cache>(rocksdb::NewLRUCache(
static_cast<size_t>(jcapacity),
static_cast<int>(jnum_shard_bits),
static_cast<bool>(jstrict_capacity_limit),
static_cast<double>(jhigh_pri_pool_ratio)));
return reinterpret_cast<jlong>(sptr_lru_cache);
}
/*
* Class: org_rocksdb_LRUCache
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_LRUCache_disposeInternal(
JNIEnv* env, jobject jobj, jlong jhandle) {
auto* sptr_lru_cache =
reinterpret_cast<std::shared_ptr<rocksdb::Cache> *>(jhandle);
delete sptr_lru_cache; // delete std::shared_ptr
}