2 This file is a part of libcds - Concurrent Data Structures library
4 (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
6 Source code repo: http://github.com/khizmax/libcds/
7 Download: http://sourceforge.net/projects/libcds/files/
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are met:
12 * Redistributions of source code must retain the above copyright notice, this
13 list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 this list of conditions and the following disclaimer in the documentation
17 and/or other materials provided with the distribution.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
23 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef CDSLIB_COMPILER_GCC_DEFS_H
32 #define CDSLIB_COMPILER_GCC_DEFS_H
35 #define CDS_COMPILER_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
37 #if CDS_COMPILER_VERSION < 40800
38 # error "Compiler version error. GCC version 4.8.0 and above is supported"
43 # define CDS_COMPILER__NAME ("GNU C++ " __VERSION__)
45 # define CDS_COMPILER__NAME "GNU C++"
47 #define CDS_COMPILER__NICK "gcc"
49 #if __cplusplus < CDS_CPLUSPLUS_11
50 # error C++11 and above is required
54 #include <cds/compiler/gcc/compiler_macro.h>
56 #define alignof __alignof__
58 // ***************************************
61 // C++11 thread_local keyword
62 #define CDS_CXX11_THREAD_LOCAL_SUPPORT
64 // *************************************************
66 // If you run under Thread Sanitizer, pass -DCDS_THREAD_SANITIZER_ENABLED in compiler command line
67 // UPD: Seems, GCC 5+ has predefined macro __SANITIZE_THREAD__, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64354
68 #if defined(__SANITIZE_THREAD__) && !defined(CDS_THREAD_SANITIZER_ENABLED)
69 # define CDS_THREAD_SANITIZER_ENABLED
72 // *************************************************
75 #define CDS_TYPE_ALIGNMENT(n) __attribute__ ((aligned (n)))
76 #define CDS_CLASS_ALIGNMENT(n) __attribute__ ((aligned (n)))
77 #define CDS_DATA_ALIGNMENT(n) __attribute__ ((aligned (n)))
80 #if CDS_COMPILER_VERSION >= 40900
81 # if __cplusplus == CDS_CPLUSPLUS_11 // C++11
82 # define CDS_DEPRECATED( reason ) [[gnu::deprecated(reason)]]
84 # define CDS_DEPRECATED( reason ) [[deprecated(reason)]]
88 # define CDS_DEPRECATED( reason ) __attribute__((deprecated( reason )))
91 #define CDS_NORETURN __attribute__((__noreturn__))
95 #define cds_likely( expr ) __builtin_expect( !!( expr ), 1 )
96 #define cds_unlikely( expr ) __builtin_expect( !!( expr ), 0 )
99 #if defined( __EXCEPTIONS ) && __EXCEPTIONS == 1
100 # define CDS_EXCEPTION_ENABLED
103 // double-width CAS support
104 // note: gcc-4.8 does not support double-word atomics
105 // gcc-4.9: a lot of crashes when use DCAS
106 // gcc-7: 128-bit atomic is not lock-free, see https://gcc.gnu.org/ml/gcc/2017-01/msg00167.html
107 // You can manually suppress wide-atomic support by defining in compiler command line:
108 // for 64bit platform: -DCDS_DISABLE_128BIT_ATOMIC
109 // for 32bit platform: -DCDS_DISABLE_64BIT_ATOMIC
110 #if CDS_COMPILER_VERSION >= 50000
111 # if CDS_BUILD_BITS == 64
112 # if !defined( CDS_DISABLE_128BIT_ATOMIC ) && defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 ) && CDS_COMPILER_VERSION < 70000
113 # define CDS_DCAS_SUPPORT
116 # if !defined( CDS_DISABLE_64BIT_ATOMIC ) && defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 )
117 # define CDS_DCAS_SUPPORT
122 //if constexpr support (C++17)
124 # if defined( __cpp_if_constexpr ) && __cpp_if_constexpr >= 201606
125 # define constexpr_if if constexpr
130 #include <cds/compiler/gcc/compiler_barriers.h>
132 #endif // #ifndef CDSLIB_COMPILER_GCC_DEFS_H