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arangodb/lib/Basics/Common.h

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////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
////////////////////////////////////////////////////////////////////////////////
#ifndef LIB_BASICS_COMMON_H
#define LIB_BASICS_COMMON_H 1
#ifdef _WIN32
// debug malloc for Windows (only used when DEBUG is set)
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#endif
#define TRI_WITHIN_COMMON 1
#include "Basics/operating-system.h"
#include "Basics/application-exit.h"
#undef TRI_WITHIN_COMMON
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <math.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef TRI_HAVE_POSIX_THREADS
#ifdef _GNU_SOURCE
#include <pthread.h>
#else
#define _GNU_SOURCE
#include <pthread.h>
#undef _GNU_SOURCE
#endif
#endif
#ifdef TRI_HAVE_PROCESS_H
#include <process.h>
#endif
#ifdef TRI_HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef TRI_HAVE_STDBOOL_H
#include <stdbool.h>
#endif
#ifdef TRI_HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef TRI_HAVE_STRINGS_H
#include <strings.h>
#endif
#include <sys/stat.h>
#include <sys/types.h>
#ifdef TRI_HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef TRI_HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
// .............................................................................
// The problem we have for visual studio is that if we include WinSock2.h here
// it may conflict later in some other source file. The conflict arises when
// windows.h is included BEFORE WinSock2.h -- this is a visual studio issue. For
// now be VERY careful to ensure that if you need windows.h, then you include
// this file AFTER common.h.
// .............................................................................
#ifdef TRI_HAVE_WINSOCK2_H
#include <WinSock2.h>
typedef long suseconds_t;
#endif
#include <algorithm>
#include <functional>
#include <map>
#include <set>
#include <string>
#include <vector>
// C++11!!
#include <unordered_map>
#include <unordered_set>
#include <memory>
#include <atomic>
#define TRI_WITHIN_COMMON 1
#include "Basics/voc-errors.h"
#include "Basics/error.h"
#include "Basics/debugging.h"
#include "Basics/make_unique.h"
#include "Basics/memory.h"
#include "Basics/structures.h"
#include "Basics/system-compiler.h"
#include "Basics/system-functions.h"
#undef TRI_WITHIN_COMMON
////////////////////////////////////////////////////////////////////////////////
/// @brief incrementing a uint64_t modulo a number with wraparound
////////////////////////////////////////////////////////////////////////////////
static inline uint64_t TRI_IncModU64(uint64_t i, uint64_t len) {
// Note that the dummy variable gives the compiler a (good) chance to
// use a conditional move instruction instead of a branch. This actually
// works on modern gcc.
uint64_t dummy;
dummy = (++i) - len;
return i < len ? i : dummy;
}
static inline uint64_t TRI_DecModU64(uint64_t i, uint64_t len) {
if ((i--) != 0) {
return i;
}
return len - 1;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief a trivial hash function for uint64_t to uint32_t
////////////////////////////////////////////////////////////////////////////////
static inline uint32_t TRI_64to32(uint64_t x) {
return static_cast<uint32_t>(x >> 32) ^ static_cast<uint32_t>(x);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief helper macro for calculating strlens for static strings at
/// a compile-time (unless compiled with fno-builtin-strlen etc.)
////////////////////////////////////////////////////////////////////////////////
#define TRI_CHAR_LENGTH_PAIR(value) (value), strlen(value)
////////////////////////////////////////////////////////////////////////////////
/// @brief asserts
////////////////////////////////////////////////////////////////////////////////
#ifndef TRI_ASSERT
#ifdef ARANGODB_ENABLE_MAINTAINER_MODE
#define TRI_ASSERT(expr) \
do { \
if (!(expr)) { \
TRI_FlushDebugging(__FILE__, __LINE__, #expr); \
TRI_PrintBacktrace(); \
std::abort(); \
} \
} while (0)
#else
#define TRI_ASSERT(expr) do { } while (0)
#endif
#endif
////////////////////////////////////////////////////////////////////////////////
/// @brief aborts program execution
///
/// if backtraces are enabled, a backtrace will be printed before
////////////////////////////////////////////////////////////////////////////////
#define FATAL_ERROR_EXIT(...) \
do { \
std::string bt; \
TRI_GetBacktrace(bt); \
if (!bt.empty()) { \
LOG(WARN) << bt; \
} \
arangodb::Logger::flush(); \
arangodb::Logger::shutdown(true); \
TRI_EXIT_FUNCTION(EXIT_FAILURE, nullptr); \
exit(EXIT_FAILURE); \
} while (0)
#ifdef _WIN32
#include "Basics/win-utils.h"
#endif
////////////////////////////////////////////////////////////////////////////////
/// @brief struct alignas(x) ... does not work in Visual Studio 2013
////////////////////////////////////////////////////////////////////////////////
#ifdef _WIN32
#define TRI_ALIGNAS(x)
#else
#define TRI_ALIGNAS(x) alignas(x)
#endif
// -----------------------------------------------------------------------------
// --SECTIONS-- deferred execution
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// Use in a function (or scope) as:
/// TRI_DEFER( <ONE_STATEMENT> );
/// and the statement will be called regardless if the function throws or
/// returns regularly.
/// Do not put multiple TRI_DEFERs on a single source code line (will not
/// compile).
/// Multiple TRI_DEFERs in one scope will be executed in reverse order of
/// appearance.
/// The idea to this is from
/// http://blog.memsql.com/c-error-handling-with-auto/
////////////////////////////////////////////////////////////////////////////////
#define TOKEN_PASTE_WRAPPED(x, y) x##y
#define TOKEN_PASTE(x, y) TOKEN_PASTE_WRAPPED(x, y)
template <typename T>
struct TRI_AutoOutOfScope {
explicit TRI_AutoOutOfScope(T& destructor) : m_destructor(destructor) {}
~TRI_AutoOutOfScope() { m_destructor(); }
private:
T& m_destructor;
};
#define TRI_DEFER_INTERNAL(Destructor, funcname, objname) \
auto funcname = [&]() { Destructor; }; \
TRI_AutoOutOfScope<decltype(funcname)> objname(funcname);
#define TRI_DEFER(Destructor) \
TRI_DEFER_INTERNAL(Destructor, TOKEN_PASTE(auto_fun, __LINE__), \
TOKEN_PASTE(auto_obj, __LINE__))
// -----------------------------------------------------------------------------
// --SECTIONS-- triagens namespace
// -----------------------------------------------------------------------------
namespace arangodb {
typedef TRI_blob_t blob_t;
typedef TRI_datetime_t datetime_t;
typedef TRI_date_t date_t;
typedef TRI_seconds_t seconds_t;
}
#undef TRI_SHOW_LOCK_TIME
#define TRI_SHOW_LOCK_THRESHOLD 0.000199
#endif
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