sys/sys/_posix.h

   1 #ifndef _SYS__POSIX_H_
   2 #define _SYS__POSIX_H_
   3
   4 /*-
   5  * Copyright (c) 1998 HD Associates, Inc.
   6  * All rights reserved.
   7  * contact: dufault@hda.com
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  * $FreeBSD: src/sys/sys/_posix.h,v 1.6 1999/12/29 04:24:36 peter Exp $
  31  * $DragonFly: src/sys/sys/_posix.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
  32  */
  33
  34 /*
  35  * This is a stand alone header file to set up for feature specification
  36  * defined to take place before the inclusion of any standard header.
  37  * It should only handle pre-processor defines.
  38  *
  39  * See section B.2.7 of 1003.1b-1993
  40  *
  41  */
  42
  43 #ifdef _KERNEL
  44
  45 #if !defined(KLD_MODULE)
  46 #include "opt_posix.h"
  47 #endif
  48
  49 /* Only kern_mib.c uses _POSIX_VERSION.  Introduce a kernel
  50  * one to avoid other pieces of the kernel getting dependant
  51  * on that.
  52  * XXX Complain if you think this dumb.
  53  */
  54
  55 /* Make P1003 structures visible for the kernel if
  56  * the P1003_1B option is in effect.
  57  */
  58 #ifdef P1003_1B
  59 #define _P1003_1B_VISIBLE
  60 #ifndef _KPOSIX_VERSION
  61 #define _KPOSIX_VERSION         199309L
  62 #endif
  63 #endif
  64
  65 #ifndef _KPOSIX_VERSION
  66 #define _KPOSIX_VERSION         199009L
  67 #endif
  68
  69 #define _P1003_1B_VISIBLE_HISTORICALLY
  70
  71 #else
  72
  73 /* Default to existing user space version.
  74  */
  75 #ifndef _POSIX_VERSION
  76 #define _POSIX_VERSION          199009L
  77 #endif
  78
  79 /* Test for visibility of P1003.1B features:
  80  * If _POSIX_SOURCE and POSIX_C_SOURCE are completely undefined
  81  * they show up.
  82  *
  83  * If they specify a version including P1003.1B then they show up.
  84  *
  85  * (Two macros are added to permit hiding new extensions while
  86  * keeping historic BSD features - that is not done now)
  87  *
  88  */
  89
  90 #if (!defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)) || \
  91  (_POSIX_VERSION  >= 199309L && defined(_POSIX_C_SOURCE) && \
  92   _POSIX_C_SOURCE >= 199309L)
  93 #define _P1003_1B_VISIBLE
  94 #define _P1003_1B_VISIBLE_HISTORICALLY
  95 #endif
  96
  97 #endif /* _KERNEL */
  98 #endif /* _SYS__POSIX_H_ */