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| 1 | +// Copyright 2025 The TensorStore Authors |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +#include "tensorstore/internal/driver_kind_registry.h" |
| 16 | + |
| 17 | +#include <optional> |
| 18 | +#include <ostream> |
| 19 | +#include <string> |
| 20 | +#include <string_view> |
| 21 | + |
| 22 | +#include "absl/base/no_destructor.h" |
| 23 | +#include "absl/base/optimization.h" |
| 24 | +#include "absl/base/thread_annotations.h" |
| 25 | +#include "absl/container/flat_hash_map.h" |
| 26 | +#include "absl/log/absl_log.h" |
| 27 | +#include "absl/synchronization/mutex.h" |
| 28 | +#include "tensorstore/util/span.h" |
| 29 | + |
| 30 | +namespace tensorstore { |
| 31 | +namespace internal { |
| 32 | + |
| 33 | +namespace { |
| 34 | +struct DriverKindRegistry { |
| 35 | + absl::Mutex mutex; |
| 36 | + absl::flat_hash_map<std::string, DriverKind> driver_kinds |
| 37 | + ABSL_GUARDED_BY(mutex); |
| 38 | +}; |
| 39 | + |
| 40 | +DriverKindRegistry& GetDriverKindRegistry() { |
| 41 | + static absl::NoDestructor<DriverKindRegistry> registry; |
| 42 | + return *registry; |
| 43 | +} |
| 44 | +} // namespace |
| 45 | + |
| 46 | +void RegisterDriverKind(std::string_view driver_id, DriverKind driver_kind) { |
| 47 | + auto& registry = GetDriverKindRegistry(); |
| 48 | + absl::MutexLock lock(®istry.mutex); |
| 49 | + if (auto result = registry.driver_kinds.emplace(driver_id, driver_kind); |
| 50 | + !result.second) { |
| 51 | + ABSL_LOG(FATAL) << driver_id << " already registered as " |
| 52 | + << result.first->second; |
| 53 | + } |
| 54 | +} |
| 55 | + |
| 56 | +void RegisterDriverKind(std::string_view id, DriverKind kind, |
| 57 | + tensorstore::span<const std::string_view> aliases) { |
| 58 | + RegisterDriverKind(id, kind); |
| 59 | + for (auto alias : aliases) { |
| 60 | + RegisterDriverKind(alias, kind); |
| 61 | + } |
| 62 | +} |
| 63 | + |
| 64 | +std::optional<DriverKind> GetDriverKind(std::string_view id) { |
| 65 | + auto& registry = GetDriverKindRegistry(); |
| 66 | + absl::MutexLock lock(®istry.mutex); |
| 67 | + auto it = registry.driver_kinds.find(id); |
| 68 | + if (it == registry.driver_kinds.end()) return std::nullopt; |
| 69 | + return it->second; |
| 70 | +} |
| 71 | + |
| 72 | +std::string_view DriverKindToStringView(DriverKind x) { |
| 73 | + switch (x) { |
| 74 | + case DriverKind::kKvStore: |
| 75 | + return "kvstore"; |
| 76 | + case DriverKind::kTensorStore: |
| 77 | + return "TensorStore"; |
| 78 | + default: |
| 79 | + ABSL_UNREACHABLE(); |
| 80 | + } |
| 81 | +} |
| 82 | + |
| 83 | +std::ostream& operator<<(std::ostream& os, DriverKind x) { |
| 84 | + return os << DriverKindToStringView(x); |
| 85 | +} |
| 86 | + |
| 87 | +} // namespace internal |
| 88 | +} // namespace tensorstore |
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