src/getpagesize.h

/* Emulate getpagesize on systems that lack it.
   Copyright (C) 1986, 1992, 1995, 2001-2012 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef HAVE_GETPAGESIZE

# include <unistd.h>

# ifdef _SC_PAGESIZE
#  define getpagesize() sysconf (_SC_PAGESIZE)
# else /* no _SC_PAGESIZE */
#  ifdef HAVE_SYS_PARAM_H
#   include <sys/param.h>
#   ifdef EXEC_PAGESIZE
#    define getpagesize() EXEC_PAGESIZE
#   else /* no EXEC_PAGESIZE */
#    ifdef NBPG
#     define getpagesize() NBPG * CLSIZE
#     ifndef CLSIZE
#      define CLSIZE 1
#     endif /* no CLSIZE */
#    else /* no NBPG */
#      ifdef PAGESIZE
#       define getpagesize() PAGESIZE
#      endif /* PAGESIZE */
#    endif /* no NBPG */
#   endif /* no EXEC_PAGESIZE */
#  else /* no HAVE_SYS_PARAM_H */
#   define getpagesize() 8192	/* punt totally */
#  endif /* no HAVE_SYS_PARAM_H */
# endif /* no _SC_PAGESIZE */

#endif /* no HAVE_GETPAGESIZE */
Commit	Line	Data
	1	/* Emulate getpagesize on systems that lack it.
	2	Copyright (C) 1986, 1992, 1995, 2001-2012 Free Software Foundation, Inc.
	3
	4	This file is part of GNU Emacs.
	5
	6	GNU Emacs is free software: you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation, either version 3 of the License, or
	9	(at your option) any later version.
	10
	11	GNU Emacs is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
	18
	19	#ifndef HAVE_GETPAGESIZE
	20
	21	# include <unistd.h>
	22
	23	# ifdef _SC_PAGESIZE
	24	# define getpagesize() sysconf (_SC_PAGESIZE)
	25	# else /* no _SC_PAGESIZE */
	26	# ifdef HAVE_SYS_PARAM_H
	27	# include <sys/param.h>
	28	# ifdef EXEC_PAGESIZE
	29	# define getpagesize() EXEC_PAGESIZE
	30	# else /* no EXEC_PAGESIZE */
	31	# ifdef NBPG
	32	# define getpagesize() NBPG * CLSIZE
	33	# ifndef CLSIZE
	34	# define CLSIZE 1
	35	# endif /* no CLSIZE */
	36	# else /* no NBPG */
	37	# ifdef PAGESIZE
	38	# define getpagesize() PAGESIZE
	39	# endif /* PAGESIZE */
	40	# endif /* no NBPG */
	41	# endif /* no EXEC_PAGESIZE */
	42	# else /* no HAVE_SYS_PARAM_H */
	43	# define getpagesize() 8192 /* punt totally */
	44	# endif /* no HAVE_SYS_PARAM_H */
	45	# endif /* no _SC_PAGESIZE */
	46
	47	#endif /* no HAVE_GETPAGESIZE */
	48