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 96