Abseil Common Libraries (C++) (grcp 依赖)
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447 lines
13 KiB
447 lines
13 KiB
// Copyright 2019 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include "absl/status/status.h" |
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#include <cassert> |
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#include "absl/base/internal/raw_logging.h" |
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#include "absl/debugging/stacktrace.h" |
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#include "absl/debugging/symbolize.h" |
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#include "absl/status/status_payload_printer.h" |
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#include "absl/strings/escaping.h" |
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#include "absl/strings/str_cat.h" |
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#include "absl/strings/str_format.h" |
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#include "absl/strings/str_split.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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// The implementation was intentionally kept same as util::error::Code_Name() |
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// to ease the migration. |
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std::string StatusCodeToString(StatusCode code) { |
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switch (code) { |
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case StatusCode::kOk: |
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return "OK"; |
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case StatusCode::kCancelled: |
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return "CANCELLED"; |
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case StatusCode::kUnknown: |
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return "UNKNOWN"; |
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case StatusCode::kInvalidArgument: |
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return "INVALID_ARGUMENT"; |
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case StatusCode::kDeadlineExceeded: |
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return "DEADLINE_EXCEEDED"; |
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case StatusCode::kNotFound: |
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return "NOT_FOUND"; |
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case StatusCode::kAlreadyExists: |
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return "ALREADY_EXISTS"; |
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case StatusCode::kPermissionDenied: |
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return "PERMISSION_DENIED"; |
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case StatusCode::kUnauthenticated: |
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return "UNAUTHENTICATED"; |
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case StatusCode::kResourceExhausted: |
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return "RESOURCE_EXHAUSTED"; |
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case StatusCode::kFailedPrecondition: |
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return "FAILED_PRECONDITION"; |
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case StatusCode::kAborted: |
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return "ABORTED"; |
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case StatusCode::kOutOfRange: |
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return "OUT_OF_RANGE"; |
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case StatusCode::kUnimplemented: |
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return "UNIMPLEMENTED"; |
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case StatusCode::kInternal: |
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return "INTERNAL"; |
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case StatusCode::kUnavailable: |
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return "UNAVAILABLE"; |
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case StatusCode::kDataLoss: |
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return "DATA_LOSS"; |
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default: |
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return ""; |
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} |
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} |
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std::ostream& operator<<(std::ostream& os, StatusCode code) { |
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return os << StatusCodeToString(code); |
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} |
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namespace status_internal { |
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static int FindPayloadIndexByUrl(const Payloads* payloads, |
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absl::string_view type_url) { |
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if (payloads == nullptr) return -1; |
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for (int i = 0; i < payloads->size(); ++i) { |
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if ((*payloads)[i].type_url == type_url) return i; |
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} |
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return -1; |
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} |
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// Convert canonical code to a value known to this binary. |
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absl::StatusCode MapToLocalCode(int value) { |
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absl::StatusCode code = static_cast<absl::StatusCode>(value); |
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switch (code) { |
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case absl::StatusCode::kOk: |
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case absl::StatusCode::kCancelled: |
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case absl::StatusCode::kUnknown: |
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case absl::StatusCode::kInvalidArgument: |
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case absl::StatusCode::kDeadlineExceeded: |
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case absl::StatusCode::kNotFound: |
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case absl::StatusCode::kAlreadyExists: |
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case absl::StatusCode::kPermissionDenied: |
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case absl::StatusCode::kResourceExhausted: |
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case absl::StatusCode::kFailedPrecondition: |
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case absl::StatusCode::kAborted: |
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case absl::StatusCode::kOutOfRange: |
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case absl::StatusCode::kUnimplemented: |
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case absl::StatusCode::kInternal: |
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case absl::StatusCode::kUnavailable: |
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case absl::StatusCode::kDataLoss: |
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case absl::StatusCode::kUnauthenticated: |
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return code; |
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default: |
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return absl::StatusCode::kUnknown; |
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} |
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} |
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} // namespace status_internal |
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absl::optional<absl::Cord> Status::GetPayload( |
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absl::string_view type_url) const { |
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const auto* payloads = GetPayloads(); |
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int index = status_internal::FindPayloadIndexByUrl(payloads, type_url); |
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if (index != -1) return (*payloads)[index].payload; |
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return absl::nullopt; |
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} |
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void Status::SetPayload(absl::string_view type_url, absl::Cord payload) { |
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if (ok()) return; |
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PrepareToModify(); |
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status_internal::StatusRep* rep = RepToPointer(rep_); |
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if (!rep->payloads) { |
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rep->payloads = absl::make_unique<status_internal::Payloads>(); |
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} |
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int index = |
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status_internal::FindPayloadIndexByUrl(rep->payloads.get(), type_url); |
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if (index != -1) { |
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(*rep->payloads)[index].payload = std::move(payload); |
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return; |
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} |
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rep->payloads->push_back({std::string(type_url), std::move(payload)}); |
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} |
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bool Status::ErasePayload(absl::string_view type_url) { |
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int index = status_internal::FindPayloadIndexByUrl(GetPayloads(), type_url); |
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if (index != -1) { |
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PrepareToModify(); |
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GetPayloads()->erase(GetPayloads()->begin() + index); |
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if (GetPayloads()->empty() && message().empty()) { |
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// Special case: If this can be represented inlined, it MUST be |
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// inlined (EqualsSlow depends on this behavior). |
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StatusCode c = static_cast<StatusCode>(raw_code()); |
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Unref(rep_); |
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rep_ = CodeToInlinedRep(c); |
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} |
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return true; |
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} |
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return false; |
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} |
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void Status::ForEachPayload( |
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const std::function<void(absl::string_view, const absl::Cord&)>& visitor) |
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const { |
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if (auto* payloads = GetPayloads()) { |
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bool in_reverse = |
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payloads->size() > 1 && reinterpret_cast<uintptr_t>(payloads) % 13 > 6; |
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for (int index = 0; index < payloads->size(); ++index) { |
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const auto& elem = |
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(*payloads)[in_reverse ? payloads->size() - 1 - index : index]; |
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#ifdef NDEBUG |
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visitor(elem.type_url, elem.payload); |
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#else |
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// In debug mode invalidate the type url to prevent users from relying on |
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// this std::string lifetime. |
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// NOLINTNEXTLINE intentional extra conversion to force temporary. |
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visitor(std::string(elem.type_url), elem.payload); |
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#endif // NDEBUG |
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} |
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} |
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} |
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const std::string* Status::EmptyString() { |
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static std::string* empty_string = new std::string(); |
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return empty_string; |
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} |
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constexpr const char Status::kMovedFromString[]; |
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const std::string* Status::MovedFromString() { |
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static std::string* moved_from_string = new std::string(kMovedFromString); |
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return moved_from_string; |
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} |
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void Status::UnrefNonInlined(uintptr_t rep) { |
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status_internal::StatusRep* r = RepToPointer(rep); |
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// Fast path: if ref==1, there is no need for a RefCountDec (since |
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// this is the only reference and therefore no other thread is |
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// allowed to be mucking with r). |
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if (r->ref.load(std::memory_order_acquire) == 1 || |
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r->ref.fetch_sub(1, std::memory_order_acq_rel) - 1 == 0) { |
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delete r; |
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} |
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} |
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uintptr_t Status::NewRep(absl::StatusCode code, absl::string_view msg, |
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std::unique_ptr<status_internal::Payloads> payloads) { |
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status_internal::StatusRep* rep = new status_internal::StatusRep; |
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rep->ref.store(1, std::memory_order_relaxed); |
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rep->code = code; |
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rep->message.assign(msg.data(), msg.size()); |
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rep->payloads = std::move(payloads); |
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return PointerToRep(rep); |
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} |
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Status::Status(absl::StatusCode code, absl::string_view msg) |
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: rep_(CodeToInlinedRep(code)) { |
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if (code != absl::StatusCode::kOk && !msg.empty()) { |
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rep_ = NewRep(code, msg, nullptr); |
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} |
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} |
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int Status::raw_code() const { |
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if (IsInlined(rep_)) { |
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return static_cast<int>(InlinedRepToCode(rep_)); |
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} |
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status_internal::StatusRep* rep = RepToPointer(rep_); |
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return static_cast<int>(rep->code); |
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} |
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absl::StatusCode Status::code() const { |
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return status_internal::MapToLocalCode(raw_code()); |
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} |
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void Status::PrepareToModify() { |
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ABSL_RAW_CHECK(!ok(), "PrepareToModify shouldn't be called on OK status."); |
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if (IsInlined(rep_)) { |
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rep_ = NewRep(static_cast<absl::StatusCode>(raw_code()), |
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absl::string_view(), nullptr); |
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return; |
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} |
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uintptr_t rep_i = rep_; |
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status_internal::StatusRep* rep = RepToPointer(rep_); |
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if (rep->ref.load(std::memory_order_acquire) != 1) { |
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std::unique_ptr<status_internal::Payloads> payloads; |
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if (rep->payloads) { |
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payloads = absl::make_unique<status_internal::Payloads>(*rep->payloads); |
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} |
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rep_ = NewRep(rep->code, message(), std::move(payloads)); |
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UnrefNonInlined(rep_i); |
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} |
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} |
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bool Status::EqualsSlow(const absl::Status& a, const absl::Status& b) { |
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if (IsInlined(a.rep_) != IsInlined(b.rep_)) return false; |
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if (a.message() != b.message()) return false; |
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if (a.raw_code() != b.raw_code()) return false; |
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if (a.GetPayloads() == b.GetPayloads()) return true; |
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const status_internal::Payloads no_payloads; |
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const status_internal::Payloads* larger_payloads = |
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a.GetPayloads() ? a.GetPayloads() : &no_payloads; |
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const status_internal::Payloads* smaller_payloads = |
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b.GetPayloads() ? b.GetPayloads() : &no_payloads; |
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if (larger_payloads->size() < smaller_payloads->size()) { |
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std::swap(larger_payloads, smaller_payloads); |
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} |
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if ((larger_payloads->size() - smaller_payloads->size()) > 1) return false; |
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// Payloads can be ordered differently, so we can't just compare payload |
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// vectors. |
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for (const auto& payload : *larger_payloads) { |
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bool found = false; |
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for (const auto& other_payload : *smaller_payloads) { |
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if (payload.type_url == other_payload.type_url) { |
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if (payload.payload != other_payload.payload) { |
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return false; |
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} |
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found = true; |
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break; |
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} |
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} |
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if (!found) return false; |
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} |
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return true; |
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} |
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std::string Status::ToStringSlow() const { |
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std::string text; |
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absl::StrAppend(&text, absl::StatusCodeToString(code()), ": ", message()); |
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status_internal::StatusPayloadPrinter printer = |
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status_internal::GetStatusPayloadPrinter(); |
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this->ForEachPayload([&](absl::string_view type_url, |
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const absl::Cord& payload) { |
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absl::optional<std::string> result; |
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if (printer) result = printer(type_url, payload); |
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absl::StrAppend( |
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&text, " [", type_url, "='", |
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result.has_value() ? *result : absl::CHexEscape(std::string(payload)), |
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"']"); |
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}); |
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return text; |
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} |
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std::ostream& operator<<(std::ostream& os, const Status& x) { |
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os << x.ToString(); |
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return os; |
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} |
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Status AbortedError(absl::string_view message) { |
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return Status(absl::StatusCode::kAborted, message); |
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} |
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Status AlreadyExistsError(absl::string_view message) { |
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return Status(absl::StatusCode::kAlreadyExists, message); |
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} |
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Status CancelledError(absl::string_view message) { |
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return Status(absl::StatusCode::kCancelled, message); |
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} |
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Status DataLossError(absl::string_view message) { |
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return Status(absl::StatusCode::kDataLoss, message); |
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} |
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Status DeadlineExceededError(absl::string_view message) { |
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return Status(absl::StatusCode::kDeadlineExceeded, message); |
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} |
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Status FailedPreconditionError(absl::string_view message) { |
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return Status(absl::StatusCode::kFailedPrecondition, message); |
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} |
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Status InternalError(absl::string_view message) { |
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return Status(absl::StatusCode::kInternal, message); |
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} |
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Status InvalidArgumentError(absl::string_view message) { |
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return Status(absl::StatusCode::kInvalidArgument, message); |
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} |
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Status NotFoundError(absl::string_view message) { |
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return Status(absl::StatusCode::kNotFound, message); |
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} |
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Status OutOfRangeError(absl::string_view message) { |
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return Status(absl::StatusCode::kOutOfRange, message); |
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} |
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Status PermissionDeniedError(absl::string_view message) { |
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return Status(absl::StatusCode::kPermissionDenied, message); |
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} |
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Status ResourceExhaustedError(absl::string_view message) { |
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return Status(absl::StatusCode::kResourceExhausted, message); |
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} |
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Status UnauthenticatedError(absl::string_view message) { |
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return Status(absl::StatusCode::kUnauthenticated, message); |
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} |
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Status UnavailableError(absl::string_view message) { |
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return Status(absl::StatusCode::kUnavailable, message); |
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} |
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Status UnimplementedError(absl::string_view message) { |
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return Status(absl::StatusCode::kUnimplemented, message); |
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} |
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Status UnknownError(absl::string_view message) { |
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return Status(absl::StatusCode::kUnknown, message); |
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} |
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bool IsAborted(const Status& status) { |
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return status.code() == absl::StatusCode::kAborted; |
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} |
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bool IsAlreadyExists(const Status& status) { |
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return status.code() == absl::StatusCode::kAlreadyExists; |
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} |
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bool IsCancelled(const Status& status) { |
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return status.code() == absl::StatusCode::kCancelled; |
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} |
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bool IsDataLoss(const Status& status) { |
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return status.code() == absl::StatusCode::kDataLoss; |
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} |
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bool IsDeadlineExceeded(const Status& status) { |
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return status.code() == absl::StatusCode::kDeadlineExceeded; |
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} |
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bool IsFailedPrecondition(const Status& status) { |
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return status.code() == absl::StatusCode::kFailedPrecondition; |
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} |
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bool IsInternal(const Status& status) { |
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return status.code() == absl::StatusCode::kInternal; |
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} |
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bool IsInvalidArgument(const Status& status) { |
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return status.code() == absl::StatusCode::kInvalidArgument; |
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} |
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bool IsNotFound(const Status& status) { |
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return status.code() == absl::StatusCode::kNotFound; |
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} |
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bool IsOutOfRange(const Status& status) { |
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return status.code() == absl::StatusCode::kOutOfRange; |
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} |
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bool IsPermissionDenied(const Status& status) { |
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return status.code() == absl::StatusCode::kPermissionDenied; |
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} |
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bool IsResourceExhausted(const Status& status) { |
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return status.code() == absl::StatusCode::kResourceExhausted; |
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} |
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bool IsUnauthenticated(const Status& status) { |
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return status.code() == absl::StatusCode::kUnauthenticated; |
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} |
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bool IsUnavailable(const Status& status) { |
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return status.code() == absl::StatusCode::kUnavailable; |
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} |
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bool IsUnimplemented(const Status& status) { |
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return status.code() == absl::StatusCode::kUnimplemented; |
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} |
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bool IsUnknown(const Status& status) { |
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return status.code() == absl::StatusCode::kUnknown; |
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} |
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ABSL_NAMESPACE_END |
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} // namespace absl
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