github.com/searKing/golang/go@v1.2.117/runtime/cgosymbolizer/include/boost/config/detail/posix_features.hpp (about)

     1  //  (C) Copyright John Maddock 2001 - 2003. 
     2  //  Use, modification and distribution are subject to the 
     3  //  Boost Software License, Version 1.0. (See accompanying file 
     4  //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
     5  
     6  
     7  //  See http://www.boost.org for most recent version.
     8  
     9  // All POSIX feature tests go in this file,
    10  // Note that we test _POSIX_C_SOURCE and _XOPEN_SOURCE as well
    11  // _POSIX_VERSION and _XOPEN_VERSION: on some systems POSIX API's
    12  // may be present but none-functional unless _POSIX_C_SOURCE and
    13  // _XOPEN_SOURCE have been defined to the right value (it's up
    14  // to the user to do this *before* including any header, although
    15  // in most cases the compiler will do this for you).
    16  
    17  #  if defined(BOOST_HAS_UNISTD_H)
    18  #     include <unistd.h>
    19  
    20        // XOpen has <nl_types.h>, but is this the correct version check?
    21  #     if defined(_XOPEN_VERSION) && (_XOPEN_VERSION >= 3)
    22  #        define BOOST_HAS_NL_TYPES_H
    23  #     endif
    24  
    25        // POSIX version 6 requires <stdint.h>
    26  #     if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 200100)
    27  #        define BOOST_HAS_STDINT_H
    28  #     endif
    29  
    30        // POSIX version 2 requires <dirent.h>
    31  #     if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199009L)
    32  #        define BOOST_HAS_DIRENT_H
    33  #     endif
    34  
    35        // POSIX version 3 requires <signal.h> to have sigaction:
    36  #     if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199506L)
    37  #        define BOOST_HAS_SIGACTION
    38  #     endif
    39        // POSIX defines _POSIX_THREADS > 0 for pthread support,
    40        // however some platforms define _POSIX_THREADS without
    41        // a value, hence the (_POSIX_THREADS+0 >= 0) check.
    42        // Strictly speaking this may catch platforms with a
    43        // non-functioning stub <pthreads.h>, but such occurrences should
    44        // occur very rarely if at all.
    45  #     if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_MPTASKS)
    46  #        define BOOST_HAS_PTHREADS
    47  #     endif
    48  
    49        // BOOST_HAS_NANOSLEEP:
    50        // This is predicated on _POSIX_TIMERS or _XOPEN_REALTIME:
    51  #     if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0)) \
    52               || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0))
    53  #        define BOOST_HAS_NANOSLEEP
    54  #     endif
    55  
    56        // BOOST_HAS_CLOCK_GETTIME:
    57        // This is predicated on _POSIX_TIMERS (also on _XOPEN_REALTIME
    58        // but at least one platform - linux - defines that flag without
    59        // defining clock_gettime):
    60  #     if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0))
    61  #        define BOOST_HAS_CLOCK_GETTIME
    62  #     endif
    63  
    64        // BOOST_HAS_SCHED_YIELD:
    65        // This is predicated on _POSIX_PRIORITY_SCHEDULING or
    66        // on _POSIX_THREAD_PRIORITY_SCHEDULING or on _XOPEN_REALTIME.
    67  #     if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING+0 > 0)\
    68              || (defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && (_POSIX_THREAD_PRIORITY_SCHEDULING+0 > 0))\
    69              || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0))
    70  #        define BOOST_HAS_SCHED_YIELD
    71  #     endif
    72  
    73        // BOOST_HAS_GETTIMEOFDAY:
    74        // BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE:
    75        // These are predicated on _XOPEN_VERSION, and appears to be first released
    76        // in issue 4, version 2 (_XOPEN_VERSION > 500).
    77        // Likewise for the functions log1p and expm1.
    78  #     if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500)
    79  #        define BOOST_HAS_GETTIMEOFDAY
    80  #        if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE+0 >= 500)
    81  #           define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
    82  #        endif
    83  #        ifndef BOOST_HAS_LOG1P
    84  #           define BOOST_HAS_LOG1P
    85  #        endif
    86  #        ifndef BOOST_HAS_EXPM1
    87  #           define BOOST_HAS_EXPM1
    88  #        endif
    89  #     endif
    90  
    91  #  endif
    92  
    93  
    94  
    95