119 lines
4.7 KiB
C++
119 lines
4.7 KiB
C++
/*
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* Error.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project 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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* http://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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#ifndef FLOW_ERROR_H
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#define FLOW_ERROR_H
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#pragma once
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#include <exception>
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#include <map>
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#include <boost/preprocessor/assert_msg.hpp>
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#include <boost/preprocessor/facilities/is_empty.hpp>
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#include <boost/preprocessor/control/if.hpp>
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#include "Platform.h"
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#include "Knobs.h"
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enum { invalid_error_code = 0xffff };
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class ErrorCodeTable : public std::map<int, std::pair<const char*, const char*>> {
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public:
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ErrorCodeTable();
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void addCode(int code, const char *name, const char *description);
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};
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class Error {
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public:
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int code() const { return error_code; }
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const char* name() const;
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const char* what() const;
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bool isInjectedFault() const { return flags & FLAG_INJECTED_FAULT; } // Use as little as possible, so injected faults effectively test real faults!
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bool isValid() const { return error_code != invalid_error_code; }
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template <class Ar>
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void serialize( Ar& ar ) {
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ar & error_code;
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}
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Error() : error_code(invalid_error_code), flags(0) {}
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explicit Error(int error_code);
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static void init();
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static std::map<int, int>& errorCounts();
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static ErrorCodeTable& errorCodeTable();
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static Error fromCode(int error_code) { Error e; e.error_code = error_code; return e; } // Doesn't change errorCounts
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static Error fromUnvalidatedCode(int error_code); // Converts codes that are outside the legal range (but not necessarily individually unknown error codes) to unknown_error()
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Error asInjectedFault() const; // Returns an error with the same code() as this but isInjectedFault() is true
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private:
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uint16_t error_code;
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uint16_t flags;
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enum Flags { FLAG_INJECTED_FAULT=1 };
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};
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#undef ERROR
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#define ERROR(name, number, description) inline Error name() { return Error( number ); }; enum { error_code_##name = number };
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#include "error_definitions.h"
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//actor_cancelled has been renamed
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inline Error actor_cancelled() { return Error( error_code_operation_cancelled ); }
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enum { error_code_actor_cancelled = error_code_operation_cancelled };
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extern Error internal_error_impl( const char* file, int line );
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#define internal_error() internal_error_impl( __FILE__, __LINE__ )
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extern bool isAssertDisabled( int line );
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//#define ASSERT( condition ) ((void)0)
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#define ASSERT( condition ) if (!((condition) || isAssertDisabled(__LINE__))) { throw internal_error(); }
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#define ASSERT_ABORT( condition ) if (!((condition) || isAssertDisabled(__LINE__))) { internal_error(); abort(); } // For use in destructors, where throwing exceptions is extremely dangerous
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#define UNSTOPPABLE_ASSERT( condition ) if (!(condition)) { throw internal_error(); }
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#define UNREACHABLE() { throw internal_error(); }
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// ASSERT_WE_THINK() is to be used for assertions that we want to validate in testing, but which are judged too
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// risky to evaluate at runtime, because the code should work even if they are false and throwing internal_error() would
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// result in a bug. Don't use it for assertions that are *expensive*; look at EXPENSIVE_VALIDATION.
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#define ASSERT_WE_THINK( condition ) ASSERT( !g_network->isSimulated() || condition )
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#define ABORT_ON_ERROR( code_to_run ) \
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try { code_to_run; } \
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catch(Error &e) { criticalError(FDB_EXIT_ABORT, "AbortOnError", e.what()); } \
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catch(...) { criticalError(FDB_EXIT_ABORT, "AbortOnError", "Aborted due to unknown error"); }
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#ifdef FDB_CLEAN_BUILD
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# define NOT_IN_CLEAN BOOST_STATIC_ASSERT_MSG(0, "This code can not be enabled in a clean build.");
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#else
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# define NOT_IN_CLEAN
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#endif
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#define FDB_EXPAND(...) __VA_ARGS__
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#define FDB_STRINGIZE(...) BOOST_PP_IIF(BOOST_PP_IS_EMPTY(FDB_EXPAND(__VA_ARGS__)), "", #__VA_ARGS__)
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#define ENABLED(...) BOOST_PP_IIF(BOOST_PP_IS_EMPTY(FDB_EXPAND(__VA_ARGS__)), 1, BOOST_PP_ASSERT_MSG(0, FDB_STRINGIZE(__VA_ARGS__)))
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#define DISABLED(...) BOOST_PP_IIF(BOOST_PP_NOT(BOOST_PP_IS_EMPTY(FDB_EXPAND(__VA_ARGS__))), 1, BOOST_PP_ASSERT_MSG(0, FDB_STRINGIZE(__VA_ARGS__)))
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/* Windows compilers won't allow the syntax of:
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#if 0 && ENABLED(x)
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So these macros replicate that, you instead do:
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#if CENABLED(0, x)
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*/
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#define CENABLED(x,y) BOOST_PP_IF(x, ENABLED(y), 0)
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#define CDISABLED(x,y) BOOST_PP_IF(x, DISABLED(y), 0)
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#endif
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