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108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
// Copyright (c) 2006-2018 Maxim Khizhinsky
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef CDSLIB_COMPILER_GCC_DEFS_H
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#define CDSLIB_COMPILER_GCC_DEFS_H
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// Compiler version
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#define CDS_COMPILER_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
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#if CDS_COMPILER_VERSION < 40800
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# error "Compiler version error. GCC version 4.8.0 and above is supported"
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#endif
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// Compiler name
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#ifdef __VERSION__
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# define CDS_COMPILER__NAME ("GNU C++ " __VERSION__)
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#else
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# define CDS_COMPILER__NAME "GNU C++"
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#endif
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#define CDS_COMPILER__NICK "gcc"
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#if __cplusplus < CDS_CPLUSPLUS_11
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# error C++11 and above is required
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#endif
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#include <cds/compiler/gcc/compiler_macro.h>
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#define alignof __alignof__
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// ***************************************
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// C++11 features
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// C++11 thread_local keyword
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#define CDS_CXX11_THREAD_LOCAL_SUPPORT
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// *************************************************
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// Features
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// If you run under Thread Sanitizer, pass -DCDS_THREAD_SANITIZER_ENABLED in compiler command line
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// UPD: Seems, GCC 5+ has predefined macro __SANITIZE_THREAD__, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64354
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#if defined(__SANITIZE_THREAD__) && !defined(CDS_THREAD_SANITIZER_ENABLED)
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# define CDS_THREAD_SANITIZER_ENABLED
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#endif
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// *************************************************
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// Alignment macro
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#define CDS_TYPE_ALIGNMENT(n) __attribute__ ((aligned (n)))
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#define CDS_CLASS_ALIGNMENT(n) __attribute__ ((aligned (n)))
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#define CDS_DATA_ALIGNMENT(n) __attribute__ ((aligned (n)))
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// Attributes
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#if CDS_COMPILER_VERSION >= 40900
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# if __cplusplus == CDS_CPLUSPLUS_11 // C++11
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# define CDS_DEPRECATED( reason ) [[gnu::deprecated(reason)]]
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# else // C++14
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# define CDS_DEPRECATED( reason ) [[deprecated(reason)]]
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# endif
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#else
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// GCC 4.8
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# define CDS_DEPRECATED( reason ) __attribute__((deprecated( reason )))
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#endif
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#define CDS_NORETURN __attribute__((__noreturn__))
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// likely/unlikely
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#define cds_likely( expr ) __builtin_expect( !!( expr ), 1 )
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#define cds_unlikely( expr ) __builtin_expect( !!( expr ), 0 )
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// Exceptions
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#if defined( __EXCEPTIONS ) && __EXCEPTIONS == 1
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# define CDS_EXCEPTION_ENABLED
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#endif
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// double-width CAS support
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// note: gcc-4.8 does not support double-word atomics
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// gcc-4.9: a lot of crashes when use DCAS
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// gcc-7: 128-bit atomic is not lock-free, see https://gcc.gnu.org/ml/gcc/2017-01/msg00167.html
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// You can manually suppress wide-atomic support by defining in compiler command line:
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// for 64bit platform: -DCDS_DISABLE_128BIT_ATOMIC
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// for 32bit platform: -DCDS_DISABLE_64BIT_ATOMIC
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#if CDS_COMPILER_VERSION >= 50000
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# if CDS_BUILD_BITS == 64
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# if !defined( CDS_DISABLE_128BIT_ATOMIC ) && defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 ) && CDS_COMPILER_VERSION < 70000
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# define CDS_DCAS_SUPPORT
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# endif
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# else
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# if !defined( CDS_DISABLE_64BIT_ATOMIC ) && defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 )
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# define CDS_DCAS_SUPPORT
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# endif
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# endif
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#endif
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//if constexpr support (C++17)
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#ifndef constexpr_if
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# if defined( __cpp_if_constexpr ) && __cpp_if_constexpr >= 201606
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# define constexpr_if if constexpr
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# endif
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#endif
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#include <cds/compiler/gcc/compiler_barriers.h>
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#endif // #ifndef CDSLIB_COMPILER_GCC_DEFS_H
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