55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
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/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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*/
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#pragma once
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#include <atomic>
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#include <cassert>
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#include <stdexcept>
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#include <string>
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namespace pzstd {
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// Coordinates graceful shutdown of the pzstd pipeline
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class ErrorHolder {
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std::atomic<bool> error_;
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std::string message_;
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public:
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ErrorHolder() : error_(false) {}
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bool hasError() noexcept {
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return error_.load();
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}
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void setError(std::string message) noexcept {
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// Given multiple possibly concurrent calls, exactly one will ever succeed.
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bool expected = false;
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if (error_.compare_exchange_strong(expected, true)) {
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message_ = std::move(message);
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}
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}
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bool check(bool predicate, std::string message) noexcept {
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if (!predicate) {
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setError(std::move(message));
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}
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return !hasError();
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}
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std::string getError() noexcept {
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error_.store(false);
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return std::move(message_);
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}
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~ErrorHolder() {
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assert(!hasError());
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}
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};
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}
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