566 lines
20 KiB
C++
566 lines
20 KiB
C++
/*
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* Platform.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_PLATFORM_H
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#define FLOW_PLATFORM_H
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#pragma once
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#if (defined(__linux__) || defined(__APPLE__))
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#define __unixish__ 1
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#endif
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#define FLOW_THREAD_SAFE 0
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#include <stdlib.h>
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#define FDB_EXIT_SUCCESS 0
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#define FDB_EXIT_ERROR 1
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#define FDB_EXIT_ABORT 3
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#define FDB_EXIT_MAIN_ERROR 10
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#define FDB_EXIT_MAIN_EXCEPTION 11
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#define FDB_EXIT_NO_MEM 20
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#define FDB_EXIT_INIT_SEMAPHORE 21
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#ifdef __cplusplus
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#define EXTERNC extern "C"
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#include <cstdlib>
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#include <cstdint>
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#include <stdio.h>
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#ifdef __unixish__
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#include <unistd.h>
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#endif
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#if !(defined(_WIN32) || defined(__unixish__))
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#error Compiling on unknown platform
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#endif
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#if defined(__linux__) && ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40500)
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#error GCC 4.5.0 or later required on this platform
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#endif
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#if defined(_WIN32) && (_MSC_VER < 1600)
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#error Visual Studio 2010 required on this platform
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#endif
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#if defined(__APPLE__) && (!((__clang__ == 1) || ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) > 40800)))
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#error Either Clang or GCC 4.8.0 or later required on this platform
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#endif
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#if (__clang__ == 1)
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#define DISABLE_ZERO_DIVISION_FLAG _Pragma("GCC diagnostic ignored \"-Wdivision-by-zero\"")
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#elif defined(_MSC_VER)
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#define DISABLE_ZERO_DIVISION_FLAG __pragma("GCC diagnostic ignored \"-Wdiv-by-zero\"")
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#else
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#define DISABLE_ZERO_DIVISION_FLAG _Pragma("GCC diagnostic ignored \"-Wdiv-by-zero\"")
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#endif
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/*
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* Thread-local storage (but keep in mind any platform-specific
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* restrictions on where this is valid and/or ignored).
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*
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* http://en.wikipedia.org/wiki/Thread-local_storage
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*
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* SOMEDAY: Intel C++ compiler uses g++ syntax on Linux and MSC syntax
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* on Windows.
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*/
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#if defined(__GNUG__)
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#define thread_local __thread
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#elif defined(_MSC_VER)
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#define thread_local __declspec(thread)
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#else
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#error Missing thread local storage
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#endif
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#if defined(__GNUG__)
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#define force_inline inline __attribute__((__always_inline__))
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#elif defined(_MSC_VER)
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#define force_inline __forceinline
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#else
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#error Missing force inline
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#endif
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/*
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* Visual Studio 2005 and beyond allow virtual and sealed while
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* targetting native code, and we get better error messages at compile
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* time with it where appropriate. Not supported with any other
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* compiler.
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*/
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#if _MSC_VER < 1400
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#define sealed
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#define override
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#endif
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/*
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* Visual Studio (.NET 2003 and beyond) has an __assume compiler
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* intrinsic to hint to the compiler that a given condition is true
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* and will remain true until the expression is altered. This can be
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* emulated on GCC and ignored elsewhere.
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*
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* http://en.chys.info/2010/07/counterpart-of-assume-in-gcc/
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*/
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#ifndef _MSC_VER
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#if defined(__GNUG__)
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#define __assume(cond) do { if (!(cond)) __builtin_unreachable(); } while (0)
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#else
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#define __assume(cond)
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#endif
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#endif
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#ifdef __unixish__
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#include <pthread.h>
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#define CRITICAL_SECTION pthread_mutex_t
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#define InitializeCriticalSection(m) \
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do { \
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pthread_mutexattr_t mta; \
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pthread_mutexattr_init(&mta); \
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pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_RECURSIVE); \
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pthread_mutex_init(m, &mta); \
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pthread_mutexattr_destroy(&mta); \
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} while (0)
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#define DeleteCriticalSection(m) pthread_mutex_destroy(m)
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#define EnterCriticalSection(m) pthread_mutex_lock(m)
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#define LeaveCriticalSection(m) pthread_mutex_unlock(m)
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#endif
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#if (defined(__GNUG__))
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#include <memory>
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#include <functional>
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#endif
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// fake<T>() is for use in decltype expressions only - there is no implementation
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template <class T> T fake();
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// g++ requires that non-dependent names have to be looked up at
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// template definition, which makes circular dependencies a royal
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// pain. (For whatever it's worth, g++ appears to be adhering to spec
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// here.) Fixing this properly requires quite a bit of reordering
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// and/or splitting things into multiple files, but Scherer pointed
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// out that it's simple to force a name to be dependent, which is what
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// we'll do for now.
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template <class Ignore, class T>
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inline static T& makeDependent(T& value) { return value; }
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#include <string>
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#include <vector>
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#if defined(_WIN32)
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#include <process.h>
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#define THREAD_FUNC static void __cdecl
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#define THREAD_FUNC_RETURN void
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#define THREAD_HANDLE void *
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THREAD_HANDLE startThread(void (func) (void *), void *arg);
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#define THREAD_RETURN return
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#elif defined(__unixish__)
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#define THREAD_FUNC static void *
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#define THREAD_FUNC_RETURN void *
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#define THREAD_HANDLE pthread_t
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THREAD_HANDLE startThread(void *(func) (void *), void *arg);
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#define THREAD_RETURN return NULL
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#else
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#error How do I start a new thread on this platform?
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#endif
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#if defined(_WIN32)
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#define DYNAMIC_LIB_EXT ".dll"
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#elif defined(__linux)
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#define DYNAMIC_LIB_EXT ".so"
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#elif defined(__APPLE__)
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#define DYNAMIC_LIB_EXT ".dylib"
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#else
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#error Port me
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#endif
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#if defined(_WIN32)
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#define ENV_VAR_PATH_SEPARATOR ';'
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#elif defined(__unixish__)
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#define ENV_VAR_PATH_SEPARATOR ':'
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#else
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#error Port me
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#endif
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void waitThread(THREAD_HANDLE thread);
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// Linux-only for now. Set thread priority "low"
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void deprioritizeThread();
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#define DEBUG_DETERMINISM 0
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std::string removeWhitespace(const std::string &t);
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struct SystemStatistics {
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bool initialized;
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double elapsed;
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double processCPUSeconds, mainThreadCPUSeconds;
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uint64_t processMemory;
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uint64_t processResidentMemory;
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uint64_t processDiskTotalBytes;
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uint64_t processDiskFreeBytes;
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double processDiskQueueDepth;
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double processDiskIdleSeconds;
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double processDiskRead;
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double processDiskWrite;
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uint64_t processDiskReadCount;
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uint64_t processDiskWriteCount;
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double processDiskWriteSectors;
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double processDiskReadSectors;
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double machineMegabitsSent;
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double machineMegabitsReceived;
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uint64_t machineOutSegs;
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uint64_t machineRetransSegs;
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double machineCPUSeconds;
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int64_t machineTotalRAM;
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int64_t machineCommittedRAM;
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int64_t machineAvailableRAM;
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SystemStatistics() : initialized(false), elapsed(0), processCPUSeconds(0), mainThreadCPUSeconds(0), processMemory(0),
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processResidentMemory(0), processDiskTotalBytes(0), processDiskFreeBytes(0), processDiskQueueDepth(0), processDiskIdleSeconds(0), processDiskRead(0), processDiskWrite(0),
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processDiskReadCount(0), processDiskWriteCount(0), processDiskWriteSectors(0), processDiskReadSectors(0), machineMegabitsSent(0), machineMegabitsReceived(0), machineOutSegs(0),
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machineRetransSegs(0), machineCPUSeconds(0), machineTotalRAM(0), machineCommittedRAM(0), machineAvailableRAM(0) {}
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};
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struct SystemStatisticsState;
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SystemStatistics getSystemStatistics(std::string dataFolder, uint32_t ip, SystemStatisticsState **statState);
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double getProcessorTimeThread();
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double getProcessorTimeProcess();
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uint64_t getMemoryUsage();
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uint64_t getResidentMemoryUsage();
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struct MachineRAMInfo {
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int64_t total;
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int64_t committed;
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int64_t available;
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};
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void getMachineRAMInfo(MachineRAMInfo& memInfo);
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void getDiskBytes(std::string const& directory, int64_t& free, int64_t& total);
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void getNetworkTraffic(uint64_t& bytesSent, uint64_t& bytesReceived, uint64_t& outSegs,
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uint64_t& retransSegs);
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void getDiskStatistics(std::string const& directory, uint64_t& currentIOs, uint64_t& busyTicks, uint64_t& reads, uint64_t& writes, uint64_t& writeSectors);
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void getMachineLoad(uint64_t& idleTime, uint64_t& totalTime);
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double timer(); // Returns the system real time clock with high precision. May jump around when system time is adjusted!
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double timer_monotonic(); // Returns a high precision monotonic clock which is adjusted to be kind of similar to timer() at startup, but might not be a globally accurate time.
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uint64_t timer_int(); // Return timer as uint64_t
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void getLocalTime(const time_t *timep, struct tm *result);
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void setMemoryQuota(size_t limit);
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void *allocate(size_t length, bool allowLargePages);
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void setAffinity(int proc);
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void threadSleep( double seconds );
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void threadYield(); // Attempt to yield to other processes or threads
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// Returns true iff the file exists
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bool fileExists(std::string const& filename);
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// Returns size of file in bytes
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int64_t fileSize(std::string const& filename);
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// Returns true if file is deleted, false if it was not found, throws platform_error() otherwise
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// Consider using IAsyncFileSystem::filesystem()->deleteFile() instead, especially if you need durability!
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bool deleteFile( std::string const& filename );
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// Renames the given file. Does not fsync the directory.
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void renameFile( std::string const& fromPath, std::string const& toPath );
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// Atomically replaces the contents of the specified file.
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void atomicReplace( std::string const& path, std::string const& content, bool textmode = true );
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// Read a file into memory
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std::string readFileBytes( std::string const& filename, int maxSize );
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// Write data buffer into file
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void writeFileBytes(std::string const& filename, const char* data, size_t count);
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// Write text into file
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void writeFile(std::string const& filename, std::string const& content);
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std::string joinPath( std::string const& directory, std::string const& filename );
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// Returns an absolute path canonicalized to use only CANONICAL_PATH_SEPARATOR
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std::string abspath( std::string const& filename );
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// Returns the portion of the path following the last path separator (e.g. the filename or directory name)
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std::string basename( std::string const& filename );
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// Returns the parent directory of the given file or directory
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std::string parentDirectory( std::string const& filename );
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// Returns the home directory of the current user
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std::string getUserHomeDirectory();
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namespace platform {
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// Returns true if directory was created, false if it existed, throws platform_error() otherwise
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bool createDirectory( std::string const& directory );
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// e.g. extension==".fdb", returns filenames relative to directory
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std::vector<std::string> listFiles( std::string const& directory, std::string const& extension = "");
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// returns directory names relative to directory
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std::vector<std::string> listDirectories( std::string const& directory );
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void findFilesRecursively(std::string path, std::vector<std::string> &out);
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// Tag the given file as "temporary", i.e. not really needing commits to disk
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void makeTemporary( const char* filename );
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// Logs an out of memory error and exits the program
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void outOfMemory();
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int getRandomSeed();
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bool getEnvironmentVar(const char* name, std::string& value);
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int setEnvironmentVar(const char *name, const char *value, int overwrite);
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std::string getWorkingDirectory();
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// Returns the ... something something figure out plugin locations
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std::string getDefaultPluginPath( const char* plugin_name );
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void *getImageOffset();
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// Places the frame pointers in a string formatted as parameters for addr2line.
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size_t raw_backtrace(void** addresses, int maxStackDepth);
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std::string get_backtrace();
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std::string format_backtrace(void **addresses, int numAddresses);
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}; // namespace platform
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#ifdef __linux__
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typedef struct {
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double timestamp;
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size_t length;
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void* frames[];
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} ProfilingSample;
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dev_t getDeviceId(std::string path);
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#endif
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#ifdef __linux__
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#include <x86intrin.h>
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#include <features.h>
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#include <sys/stat.h>
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#endif
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// Version of CLang bundled with XCode doesn't yet include ia32intrin.h.
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#ifdef __APPLE__
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#if !(__has_builtin(__rdtsc))
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inline static uint64_t __rdtsc() {
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uint64_t lo, hi;
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asm( "rdtsc" : "=a" (lo), "=d" (hi) );
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return( lo | (hi << 32) );
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}
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#endif
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#endif
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#ifdef _WIN32
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#include <intrin.h>
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inline static int32_t interlockedIncrement(volatile int32_t *a) { return _InterlockedIncrement((long*)a); }
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inline static int64_t interlockedIncrement64(volatile int64_t *a) { return _InterlockedIncrement64(a); }
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inline static int32_t interlockedDecrement(volatile int32_t *a) { return _InterlockedDecrement((long*)a); }
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inline static int64_t interlockedDecrement64(volatile int64_t *a) { return _InterlockedDecrement64(a); }
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inline static int32_t interlockedCompareExchange(volatile int32_t *a, int32_t b, int32_t c) { return _InterlockedCompareExchange((long*)a, (long)b, (long)c); }
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inline static int64_t interlockedExchangeAdd64(volatile int64_t *a, int64_t b) { return _InterlockedExchangeAdd64(a, b); }
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inline static int64_t interlockedExchange64(volatile int64_t *a, int64_t b) { return _InterlockedExchange64(a, b); }
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inline static int64_t interlockedOr64(volatile int64_t *a, int64_t b) { return _InterlockedOr64(a, b); }
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#elif defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8)
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#include <xmmintrin.h>
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inline static int32_t interlockedIncrement(volatile int32_t *a) { return __sync_add_and_fetch(a, 1); }
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inline static int64_t interlockedIncrement64(volatile int64_t *a) { return __sync_add_and_fetch(a, 1); }
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inline static int32_t interlockedDecrement(volatile int32_t *a) { return __sync_add_and_fetch(a, -1); }
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inline static int64_t interlockedDecrement64(volatile int64_t *a) { return __sync_add_and_fetch(a, -1); }
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inline static int32_t interlockedCompareExchange(volatile int32_t *a, int32_t b, int32_t c) { return __sync_val_compare_and_swap(a, c, b); }
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inline static int64_t interlockedExchangeAdd64(volatile int64_t *a, int64_t b) { return __sync_fetch_and_add(a, b); }
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inline static int64_t interlockedExchange64(volatile int64_t *a, int64_t b) {
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__sync_synchronize();
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return __sync_lock_test_and_set(a, b);
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}
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inline static int64_t interlockedOr64(volatile int64_t *a, int64_t b) { return __sync_fetch_and_or(a, b); }
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#else
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#error No implementation of atomic instructions
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#endif
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template <class T> inline static T* interlockedExchangePtr(T*volatile*a, T*b) { static_assert(sizeof(T*)==sizeof(int64_t),"Port me!"); return (T*)interlockedExchange64((volatile int64_t*)a, (int64_t)b); }
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#if FLOW_THREAD_SAFE
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#define thread_volatile volatile
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inline static int64_t flowInterlockedExchangeAdd64( volatile int64_t* p, int64_t a ) { return interlockedExchangeAdd64(p, a); }
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inline static int64_t flowInterlockedIncrement64( volatile int64_t* p ) { return interlockedIncrement64(p); }
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inline static int64_t flowInterlockedDecrement64( volatile int64_t* p ) { return interlockedDecrement64(p); }
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inline static int64_t flowInterlockedExchange64( volatile int64_t* p, int64_t a ) { return interlockedExchange64(p, a); }
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inline static int64_t flowInterlockedOr64( volatile int64_t* p, int64_t a ) { return interlockedOr64(p, a); }
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inline static int64_t flowInterlockedAnd64( volatile int64_t* p, int64_t a ) { return interlockedAnd64(p, a); }
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#else
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#define thread_volatile
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inline static int64_t flowInterlockedExchangeAdd64( int64_t* p, int64_t a ) { auto old=*p; *p+=a; return old; }
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inline static int64_t flowInterlockedIncrement64( int64_t* p ) { return ++*p; }
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inline static int64_t flowInterlockedDecrement64( int64_t* p ) { return --*p; }
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inline static int64_t flowInterlockedExchange64( int64_t* p, int64_t a ) { auto old=*p; *p=a; return old; }
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inline static int64_t flowInterlockedOr64( int64_t* p, int64_t a ) { auto old=*p; *p |= a; return old; }
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inline static int64_t flowInterlockedAnd64( int64_t* p, int64_t a ) { auto old=*p; *p &= a; return old; }
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#endif
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// We only run on little-endian system, so conversion to/from bigEndian64 is always a byte swap
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#ifdef _MSC_VER
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#define bigEndian16(value) uint16_t(_byteswap_ushort(value))
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#define bigEndian32(value) uint32_t(_byteswap_ulong(value))
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#define bigEndian64(value) uint64_t(_byteswap_uint64(value))
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#elif __GNUG__
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#define bigEndian16(value) uint16_t((value>>8)|(value<<8))
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#define bigEndian32(value) uint32_t(__builtin_bswap32(value))
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#define bigEndian64(value) uint64_t(__builtin_bswap64(value))
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#else
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#error Missing byte swap methods
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#endif
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#define littleEndian16(value) value
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#define littleEndian32(value) value
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#define littleEndian64(value) value
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#if defined(_WIN32)
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inline static void flushOutputStreams() { _flushall(); }
|
|
#elif defined(__unixish__)
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|
inline static void flushOutputStreams() { fflush(NULL); }
|
|
#else
|
|
#error Missing flush output stream
|
|
#endif
|
|
|
|
|
|
#if defined(_MSC_VER)
|
|
#define DLLEXPORT __declspec(dllexport)
|
|
#elif defined(__GNUG__)
|
|
#define DLLEXPORT __attribute__ ((visibility ("default")))
|
|
#else
|
|
#error Missing symbol export
|
|
#endif
|
|
|
|
#define crashAndDie() (*(volatile int*)0 = 0)
|
|
|
|
#ifdef _WIN32
|
|
#define strcasecmp stricmp
|
|
#endif
|
|
|
|
#if defined(__GNUG__)
|
|
#define DEFAULT_CONSTRUCTORS(X) \
|
|
X( X const& rhs ) = default; \
|
|
X& operator=( X const& rhs ) = default;
|
|
#else
|
|
#define DEFAULT_CONSTRUCTORS(X)
|
|
#endif
|
|
|
|
|
|
#if defined(_WIN32)
|
|
#define strtoull(nptr, endptr, base) _strtoui64(nptr, endptr, base)
|
|
#endif
|
|
|
|
#if defined(_MSC_VER)
|
|
inline static void* aligned_alloc(size_t alignment, size_t size) { return _aligned_malloc(size, alignment); }
|
|
inline static void aligned_free(void* ptr) { _aligned_free(ptr); }
|
|
#elif defined(__linux__)
|
|
#include <malloc.h>
|
|
inline static void aligned_free(void* ptr) { free(ptr); }
|
|
#if (!defined(_ISOC11_SOURCE)) // old libc versions
|
|
inline static void* aligned_alloc(size_t alignment, size_t size) { return memalign(alignment, size); }
|
|
#endif
|
|
#elif defined(__APPLE__)
|
|
#include <cstdlib>
|
|
inline static void* aligned_alloc(size_t alignment, size_t size) {
|
|
// Linux's aligned_alloc() requires alignment to be a power of 2. While posix_memalign()
|
|
// also requires this, in addition it requires alignment to be a multiple of sizeof(void *).
|
|
// Rather than add this requirement to the platform::aligned_alloc() interface we will simply
|
|
// upgrade powers of 2 which are less than sizeof(void *) to be exactly sizeof(void *). Non
|
|
// powers of 2 of any size will fail as they would on other platforms. This change does not
|
|
// break the platform::aligned_alloc() contract as all addresses which are aligned to
|
|
// sizeof(void *) are also aligned to any power of 2 less than sizeof(void *).
|
|
if(alignment != 0 && alignment < sizeof(void *) && (alignment & (alignment - 1)) == 0) {
|
|
alignment = sizeof(void *);
|
|
}
|
|
void* ptr = nullptr;
|
|
posix_memalign(&ptr, alignment, size);
|
|
return ptr;
|
|
}
|
|
inline static void aligned_free(void* ptr) { free(ptr); }
|
|
#endif
|
|
|
|
// lib_path may be a relative or absolute path or a name to be
|
|
// resolved by whatever linker is hanging around on this system
|
|
bool isLibraryLoaded(const char* lib_path);
|
|
void* loadLibrary(const char* lib_path);
|
|
void* loadFunction(void* lib, const char* func_name);
|
|
|
|
// MSVC not support noexcept yet
|
|
#ifndef __GNUG__
|
|
#ifndef VS14
|
|
#define noexcept(enabled)
|
|
#endif
|
|
#endif
|
|
|
|
#else
|
|
#define EXTERNC
|
|
#endif // __cplusplus
|
|
|
|
/*
|
|
* Multiply Defined Symbol (support for weak function declaration).
|
|
*/
|
|
#ifndef MULTIPLY_DEFINED_SYMBOL
|
|
#if defined(_MSC_VER)
|
|
#define MULTIPLY_DEFINED_SYMBOL
|
|
#else
|
|
#define MULTIPLY_DEFINED_SYMBOL __attribute__((weak))
|
|
#endif
|
|
#endif
|
|
|
|
// Logs a critical error message and exits the program
|
|
EXTERNC void criticalError(int exitCode, const char *type, const char *message);
|
|
EXTERNC void flushAndExit(int exitCode);
|
|
|
|
// Initilization code that's run at the beginning of every entry point (except fdbmonitor)
|
|
void platformInit();
|
|
|
|
void registerCrashHandler();
|
|
void setupSlowTaskProfiler();
|
|
EXTERNC void setProfilingEnabled(int enabled);
|
|
|
|
// Use _exit() or criticalError(), not exit()
|
|
#define CALLS_TO_EXIT_ARE_FORBIDDEN_BY_POLICY() [====]
|
|
#define exit CALLS_TO_EXIT_ARE_FORBIDDEN_BY_POLICY(0)
|
|
|
|
#if defined(FDB_CLEAN_BUILD) && !( defined(NDEBUG) && !defined(_DEBUG) && !defined(SQLITE_DEBUG) )
|
|
#error Clean builds must define NDEBUG, and not define various debug macros
|
|
#endif
|
|
|
|
#endif /* FLOW_PLATFORM_H */
|