2010-07-26 17:06:36 +00:00
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// (C) Copyright John Maddock 2001 - 2003.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org for most recent version.
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// All POSIX feature tests go in this file,
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// Note that we test _POSIX_C_SOURCE and _XOPEN_SOURCE as well
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// _POSIX_VERSION and _XOPEN_VERSION: on some systems POSIX API's
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// may be present but none-functional unless _POSIX_C_SOURCE and
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// _XOPEN_SOURCE have been defined to the right value (it's up
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// to the user to do this *before* including any header, although
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// in most cases the compiler will do this for you).
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# if defined(BOOST_HAS_UNISTD_H)
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# include <unistd.h>
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// XOpen has <nl_types.h>, but is this the correct version check?
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# if defined(_XOPEN_VERSION) && (_XOPEN_VERSION >= 3)
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# define BOOST_HAS_NL_TYPES_H
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# endif
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// POSIX version 6 requires <stdint.h>
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# if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 200100)
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# define BOOST_HAS_STDINT_H
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# endif
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// POSIX version 2 requires <dirent.h>
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# if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199009L)
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# define BOOST_HAS_DIRENT_H
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# endif
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// POSIX version 3 requires <signal.h> to have sigaction:
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# if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199506L)
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# define BOOST_HAS_SIGACTION
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# endif
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// POSIX defines _POSIX_THREADS > 0 for pthread support,
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// however some platforms define _POSIX_THREADS without
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// a value, hence the (_POSIX_THREADS+0 >= 0) check.
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// Strictly speaking this may catch platforms with a
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// non-functioning stub <pthreads.h>, but such occurrences should
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// occur very rarely if at all.
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# if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_MPTASKS)
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# define BOOST_HAS_PTHREADS
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# endif
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// BOOST_HAS_NANOSLEEP:
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// This is predicated on _POSIX_TIMERS or _XOPEN_REALTIME:
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# if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0)) \
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|| (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0))
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# define BOOST_HAS_NANOSLEEP
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# endif
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// BOOST_HAS_CLOCK_GETTIME:
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// This is predicated on _POSIX_TIMERS (also on _XOPEN_REALTIME
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// but at least one platform - linux - defines that flag without
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// defining clock_gettime):
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# if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0))
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# define BOOST_HAS_CLOCK_GETTIME
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# endif
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// BOOST_HAS_SCHED_YIELD:
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// This is predicated on _POSIX_PRIORITY_SCHEDULING or
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// on _POSIX_THREAD_PRIORITY_SCHEDULING or on _XOPEN_REALTIME.
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# if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING+0 > 0)\
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|| (defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && (_POSIX_THREAD_PRIORITY_SCHEDULING+0 > 0))\
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|| (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0))
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# define BOOST_HAS_SCHED_YIELD
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# endif
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// BOOST_HAS_GETTIMEOFDAY:
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// BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE:
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// These are predicated on _XOPEN_VERSION, and appears to be first released
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// in issue 4, version 2 (_XOPEN_VERSION > 500).
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// Likewise for the functions log1p and expm1.
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# if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500)
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# define BOOST_HAS_GETTIMEOFDAY
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# if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE+0 >= 500)
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# define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
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# endif
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# ifndef BOOST_HAS_LOG1P
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# define BOOST_HAS_LOG1P
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# endif
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# ifndef BOOST_HAS_EXPM1
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# define BOOST_HAS_EXPM1
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# endif
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# endif
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# endif
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