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rocksdb/cache/cache_entry_roles.cc

66 lines
1.6 KiB

// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "cache/cache_entry_roles.h"
#include <mutex>
#include "port/lang.h"
namespace ROCKSDB_NAMESPACE {
std::array<const char*, kNumCacheEntryRoles> kCacheEntryRoleToCamelString{{
"DataBlock",
"FilterBlock",
"FilterMetaBlock",
"DeprecatedFilterBlock",
"IndexBlock",
"OtherBlock",
"WriteBuffer",
"Misc",
}};
std::array<const char*, kNumCacheEntryRoles> kCacheEntryRoleToHyphenString{{
"data-block",
"filter-block",
"filter-meta-block",
"deprecated-filter-block",
"index-block",
"other-block",
"write-buffer",
"misc",
}};
namespace {
struct Registry {
std::mutex mutex;
std::unordered_map<Cache::DeleterFn, CacheEntryRole> role_map;
void Register(Cache::DeleterFn fn, CacheEntryRole role) {
std::lock_guard<std::mutex> lock(mutex);
role_map[fn] = role;
}
std::unordered_map<Cache::DeleterFn, CacheEntryRole> Copy() {
std::lock_guard<std::mutex> lock(mutex);
return role_map;
}
};
Registry& GetRegistry() {
STATIC_AVOID_DESTRUCTION(Registry, registry);
return registry;
}
} // namespace
void RegisterCacheDeleterRole(Cache::DeleterFn fn, CacheEntryRole role) {
GetRegistry().Register(fn, role);
}
std::unordered_map<Cache::DeleterFn, CacheEntryRole> CopyCacheDeleterRoleMap() {
return GetRegistry().Copy();
}
} // namespace ROCKSDB_NAMESPACE