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a6ae3edab9
Summary: This change makes it so that all of the C++ code related to the edenfs daemon is now contained in the eden/fs subdirectory. Reviewed By: bolinfest, wez Differential Revision: D4889053 fbshipit-source-id: d0bd4774cc0bdb5d1d6b6f47d716ecae52391f37
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/*
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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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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*
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*/
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#pragma once
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#include <folly/Format.h>
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#include <folly/Optional.h>
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#include <folly/Synchronized.h>
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#include <memory>
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#include <system_error>
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#include "eden/fs/inodes/InodePtr.h"
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#include "eden/fs/utils/PathFuncs.h"
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namespace facebook {
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namespace eden {
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/**
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* A subclass of std::system_error referring to a specific inode.
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*
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* The main advantage of this class is that it can include the Inode path in
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* the error message. However, it avoids computing the path until the error
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* message is actually needed. If the error is caught and handled without
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* looking at the error message, then the path never needs to be computed.
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*/
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class InodeError : public std::system_error {
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public:
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InodeError(int errnum, InodePtr inode)
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: std::system_error(errnum, std::system_category()),
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inode_(std::move(inode)) {}
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InodeError(int errnum, TreeInodePtr inode, PathComponentPiece child);
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InodeError(int errnum, InodePtr inode, std::string message)
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: std::system_error(errnum, std::system_category()),
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inode_(std::move(inode)),
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message_(std::move(message)) {}
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InodeError(
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int errnum,
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TreeInodePtr inode,
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PathComponentPiece child,
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std::string&& message);
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template <typename... Args>
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InodeError(
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int errnum,
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InodePtr inode,
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folly::StringPiece format,
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Args&&... args)
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: InodeError(
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errnum,
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inode,
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folly::sformat(format, std::forward<Args>(args)...)) {}
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template <typename... Args>
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InodeError(
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int errnum,
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TreeInodePtr inode,
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PathComponentPiece child,
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folly::StringPiece format,
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Args&&... args)
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: InodeError(
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errnum,
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inode,
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child,
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message_(folly::sformat(format, std::forward<Args>(args)...))) {}
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const char* what() const noexcept override;
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int errnum() const {
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return code().value();
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}
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InodeError(InodeError const&) = default;
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InodeError& operator=(InodeError const&) = default;
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InodeError(InodeError&&) = default;
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InodeError& operator=(InodeError&&) = default;
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private:
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std::string computeMessage() const;
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InodePtr inode_;
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folly::Optional<PathComponent> child_;
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std::string message_;
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mutable folly::Synchronized<std::string> fullMessage_;
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};
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}
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}
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