1 // (C) Copyright Boost.org 2001. Permission to copy, use, modify, sell and
2 // distribute this software is granted provided this copyright notice appears
3 // in all copies. This software is provided "as is" without express or implied
4 // warranty, and with no claim as to its suitability for any purpose.
6 // See http://www.boost.org for most recent version.
8 // All POSIX feature tests go in this file,
9 // Note that we test _POSIX_C_SOURCE and _XOPEN_SOURCE as well
10 // _POSIX_VERSION and _XOPEN_VERSION: on some systems POSIX API's
11 // may be present but none-functional unless _POSIX_C_SOURCE and
12 // _XOPEN_SOURCE have been defined to the right value (it's up
13 // to the user to do this *before* including any header, although
14 // in most cases the compiler will do this for you).
16 # if defined(BOOST_HAS_UNISTD_H)
19 // XOpen has <nl_types.h>, but is this the correct version check?
20 # if defined(_XOPEN_VERSION) && (_XOPEN_VERSION >= 3)
21 # define BOOST_HAS_NL_TYPES_H
24 // POSIX version 6 requires <stdint.h>
25 # if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 200100)
26 # define BOOST_HAS_STDINT_H
29 // POSIX version 2 requires <dirent.h>
30 # if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199009L)
31 # define BOOST_HAS_DIRENT_H
34 // POSIX version 3 requires <signal.h> to have sigaction:
35 # if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199506L)
36 # define BOOST_HAS_SIGACTION
38 // POSIX defines _POSIX_THREADS > 0 for pthread support,
39 // however some platforms define _POSIX_THREADS without
40 // a value, hence the (_POSIX_THREADS+0 >= 0) check.
41 // Strictly speaking this may catch platforms with a
42 // non-functioning stub <pthreads.h>, but such occurrences should
43 // occur very rarely if at all.
44 # if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_MPTASKS)
45 # define BOOST_HAS_PTHREADS
48 // BOOST_HAS_NANOSLEEP:
49 // This is predicated on _POSIX_TIMERS or _XOPEN_REALTIME:
50 # if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0)) \
51 || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0))
52 # define BOOST_HAS_NANOSLEEP
55 // BOOST_HAS_CLOCK_GETTIME:
56 // This is predicated on _POSIX_TIMERS (also on _XOPEN_REALTIME
57 // but at least one platform - linux - defines that flag without
58 // defining clock_gettime):
59 # if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0))
60 # define BOOST_HAS_CLOCK_GETTIME
63 // BOOST_HAS_SCHED_YIELD:
64 // This is predicated on _POSIX_PRIORITY_SCHEDULING or
65 // on _POSIX_THREAD_PRIORITY_SCHEDULING or on _XOPEN_REALTIME.
66 # if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING+0 > 0)\
67 || (defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && (_POSIX_THREAD_PRIORITY_SCHEDULING+0 > 0))\
68 || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0))
69 # define BOOST_HAS_SCHED_YIELD
72 // BOOST_HAS_GETTIMEOFDAY:
73 // BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE:
74 // These are predicated on _XOPEN_VERSION, and appears to be first released
75 // in issue 4, version 2 (_XOPEN_VERSION > 500).
76 # if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500)
77 # define BOOST_HAS_GETTIMEOFDAY
78 # if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
79 # define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE