fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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47 lines
1.2 KiB
47 lines
1.2 KiB
// Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#ifndef ROCKSDB_LITE
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#include "rocksdb/utilities/env_registry.h"
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#include <map>
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#include <string>
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namespace rocksdb {
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struct EnvRegistryEntry {
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std::string prefix;
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EnvFactoryFunc env_factory;
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};
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struct EnvRegistry {
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static EnvRegistry* Get() {
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static EnvRegistry instance;
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return &instance;
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}
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std::vector<EnvRegistryEntry> entries;
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private:
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EnvRegistry() = default;
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};
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Env* NewEnvFromUri(const std::string& uri, std::unique_ptr<Env>* env_guard) {
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env_guard->reset();
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for (const auto& entry : EnvRegistry::Get()->entries) {
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if (uri.compare(0, entry.prefix.size(), entry.prefix) == 0) {
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return entry.env_factory(uri, env_guard);
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}
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}
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return nullptr;
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}
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EnvRegistrar::EnvRegistrar(std::string uri_prefix, EnvFactoryFunc env_factory) {
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EnvRegistry::Get()->entries.emplace_back(
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EnvRegistryEntry{std::move(uri_prefix), std::move(env_factory)});
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}
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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