Abseil Common Libraries (C++) (grcp 依赖)
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64 lines
2.1 KiB
64 lines
2.1 KiB
// Copyright 2022 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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// |
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// ----------------------------------------------------------------------------- |
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// File: log/log_sink.h |
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// ----------------------------------------------------------------------------- |
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// |
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// This header declares the interface class `absl::LogSink`. |
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#ifndef ABSL_LOG_LOG_SINK_H_ |
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#define ABSL_LOG_LOG_SINK_H_ |
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#include "absl/base/config.h" |
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#include "absl/log/log_entry.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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// absl::LogSink |
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// |
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// `absl::LogSink` is an interface which can be extended to intercept and |
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// process particular messages (with `LOG.ToSinkOnly()` or |
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// `LOG.ToSinkAlso()`) or all messages (if registered with |
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// `absl::AddLogSink`). Implementations must be thread-safe, and should take |
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// care not to take any locks that might be held by the `LOG` caller. |
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class LogSink { |
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public: |
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virtual ~LogSink() = default; |
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// LogSink::Send() |
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// |
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// `Send` is called synchronously during the log statement. |
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// |
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// It is safe to use `LOG` within an implementation of `Send`. `ToSinkOnly` |
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// and `ToSinkAlso` are safe in general but can be used to create an infinite |
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// loop if you try. |
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virtual void Send(const absl::LogEntry& entry) = 0; |
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// LogSink::Flush() |
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// |
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// Sinks that buffer messages should override this method to flush the buffer |
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// and return. |
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virtual void Flush() {} |
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private: |
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// https://lld.llvm.org/missingkeyfunction.html#missing-key-function |
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virtual void KeyFunction() const final; // NOLINT(readability/inheritance) |
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}; |
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ABSL_NAMESPACE_END |
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} // namespace absl |
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#endif // ABSL_LOG_LOG_SINK_H_
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