// (C) Copyright John Maddock 2001 - 2003. // Use, modification and distribution are subject to the // Boost Software License, Version 1.0. (See accompanying file // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // See http://www.boost.org for most recent version. // All POSIX feature tests go in this file, // Note that we test _POSIX_C_SOURCE and _XOPEN_SOURCE as well // _POSIX_VERSION and _XOPEN_VERSION: on some systems POSIX API's // may be present but none-functional unless _POSIX_C_SOURCE and // _XOPEN_SOURCE have been defined to the right value (it's up // to the user to do this *before* including any header, although // in most cases the compiler will do this for you). # if defined(BOOST_HAS_UNISTD_H) # include <unistd.h> // XOpen has <nl_types.h>, but is this the correct version check? # if defined(_XOPEN_VERSION) && (_XOPEN_VERSION >= 3) # define BOOST_HAS_NL_TYPES_H # endif // POSIX version 6 requires <stdint.h> # if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 200100) # define BOOST_HAS_STDINT_H # endif // POSIX version 2 requires <dirent.h> # if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199009L) # define BOOST_HAS_DIRENT_H # endif // POSIX version 3 requires <signal.h> to have sigaction: # if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199506L) # define BOOST_HAS_SIGACTION # endif // POSIX defines _POSIX_THREADS > 0 for pthread support, // however some platforms define _POSIX_THREADS without // a value, hence the (_POSIX_THREADS+0 >= 0) check. // Strictly speaking this may catch platforms with a // non-functioning stub <pthreads.h>, but such occurrences should // occur very rarely if at all. # if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_MPTASKS) # define BOOST_HAS_PTHREADS # endif // BOOST_HAS_NANOSLEEP: // This is predicated on _POSIX_TIMERS or _XOPEN_REALTIME: # if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0)) \ || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0)) # define BOOST_HAS_NANOSLEEP # endif // BOOST_HAS_CLOCK_GETTIME: // This is predicated on _POSIX_TIMERS (also on _XOPEN_REALTIME // but at least one platform - linux - defines that flag without // defining clock_gettime): # if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0)) # define BOOST_HAS_CLOCK_GETTIME # endif // BOOST_HAS_SCHED_YIELD: // This is predicated on _POSIX_PRIORITY_SCHEDULING or // on _POSIX_THREAD_PRIORITY_SCHEDULING or on _XOPEN_REALTIME. # if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING+0 > 0)\ || (defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && (_POSIX_THREAD_PRIORITY_SCHEDULING+0 > 0))\ || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0)) # define BOOST_HAS_SCHED_YIELD # endif // BOOST_HAS_GETTIMEOFDAY: // BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE: // These are predicated on _XOPEN_VERSION, and appears to be first released // in issue 4, version 2 (_XOPEN_VERSION > 500). // Likewise for the functions log1p and expm1. # if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500) # define BOOST_HAS_GETTIMEOFDAY # if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE+0 >= 500) # define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE # endif # ifndef BOOST_HAS_LOG1P # define BOOST_HAS_LOG1P # endif # ifndef BOOST_HAS_EXPM1 # define BOOST_HAS_EXPM1 # endif # endif # endif