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50 lines
1.9 KiB
50 lines
1.9 KiB
1 year ago
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// This file implements the "bridge" between Java and C++ for
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// ROCKSDB_NAMESPACE::LRUCache.
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#include "cache/lru_cache.h"
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#include <jni.h>
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#include "include/org_rocksdb_LRUCache.h"
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#include "rocksjni/cplusplus_to_java_convert.h"
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/*
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* Class: org_rocksdb_LRUCache
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* Method: newLRUCache
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* Signature: (JIZD)J
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*/
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jlong Java_org_rocksdb_LRUCache_newLRUCache(JNIEnv* /*env*/, jclass /*jcls*/,
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jlong jcapacity,
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jint jnum_shard_bits,
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jboolean jstrict_capacity_limit,
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jdouble jhigh_pri_pool_ratio,
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jdouble jlow_pri_pool_ratio) {
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auto* sptr_lru_cache = new std::shared_ptr<ROCKSDB_NAMESPACE::Cache>(
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ROCKSDB_NAMESPACE::NewLRUCache(
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static_cast<size_t>(jcapacity), static_cast<int>(jnum_shard_bits),
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static_cast<bool>(jstrict_capacity_limit),
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static_cast<double>(jhigh_pri_pool_ratio),
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nullptr /* memory_allocator */, rocksdb::kDefaultToAdaptiveMutex,
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rocksdb::kDefaultCacheMetadataChargePolicy,
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static_cast<double>(jlow_pri_pool_ratio)));
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return GET_CPLUSPLUS_POINTER(sptr_lru_cache);
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}
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/*
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* Class: org_rocksdb_LRUCache
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* Method: disposeInternal
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* Signature: (J)V
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*/
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void Java_org_rocksdb_LRUCache_disposeInternal(JNIEnv* /*env*/,
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jobject /*jobj*/,
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jlong jhandle) {
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auto* sptr_lru_cache =
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reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Cache>*>(jhandle);
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delete sptr_lru_cache; // delete std::shared_ptr
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}
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