aaa5f039eb
* configure.in (MAKEINFO, PERL): Detect these. (--enable-maintainer-mode): Add. * configure: Regenerate. * Makefile.in (MAKEINFO, PERL): Define. (libiberty.info, libiberty.dvi, libiberty.html): New. (CFILES): Add bsearch.c. (CONFIGURED_OFILES): New, list of objects configure might add. (maint-missing, maint-buildall): New, for maintainers only. (clean, mostlyclean): Add info/dvi/html files. * libiberty.texi, copying-lib.texi, obstacks.texi, functions.texi: New. * gather-docs: New, for maintainers. * maint-tool: New, for maintainers. * alloca.c, atexit.c, basename.c, bcmp.c, bcopy.c, bsearch.c, bzero.c, calloc.c, clock.c, configure.in, configure, getcwd.c, getpagesize.c, getpwd.c, index.c, memchr.c, memcmp.c, memcpy.c, memmove.c, memset.c, putenv.c, rename.c, rindex.c, setenv.c, sigsetmask.c, strcasecmp.c, strchr.c, strdup.c, strerror.c, strncasecmp.c, strncmp.c, strrchr.c, strstr.c, strtod.c, strtol.c, tmpnam.c, vfork.c, vprintf.c, waitpid.c, xatexit.c, xexit.c, xmalloc.c, xmemdup.c, xstrdup.c, xstrerror.c: Add or update documentation. Co-Authored-By: Phil Edwards <pedwards@disaster.jaj.com> From-SVN: r45828
91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
/* Emulation of getpagesize() for systems that need it. */
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/*
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@deftypefn Supplemental int getpagesize ()
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Returns the number of bytes in a page of memory. This is the
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granularity of many of the system memory management routines. No
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guarantee is made as to whether or not it is the same as the basic
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memory management hardware page size.
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@end deftypefn
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BUGS
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Is intended as a reasonable replacement for systems where this
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is not provided as a system call. The value of 4096 may or may
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not be correct for the systems where it is returned as the default
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value.
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*/
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#ifndef VMS
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#include "config.h"
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#include <sys/types.h>
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#undef GNU_OUR_PAGESIZE
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#if defined (HAVE_SYSCONF) && defined (HAVE_UNISTD_H)
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#include <unistd.h>
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#ifdef _SC_PAGESIZE
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#define GNU_OUR_PAGESIZE sysconf(_SC_PAGESIZE)
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#endif
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#endif
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#ifndef GNU_OUR_PAGESIZE
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# ifdef PAGESIZE
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# define GNU_OUR_PAGESIZE PAGESIZE
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# else /* no PAGESIZE */
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# ifdef EXEC_PAGESIZE
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# define GNU_OUR_PAGESIZE EXEC_PAGESIZE
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# else /* no EXEC_PAGESIZE */
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# ifdef NBPG
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# define GNU_OUR_PAGESIZE (NBPG * CLSIZE)
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# ifndef CLSIZE
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# define CLSIZE 1
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# endif /* CLSIZE */
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# else /* no NBPG */
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# ifdef NBPC
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# define GNU_OUR_PAGESIZE NBPC
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# else /* no NBPC */
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# define GNU_OUR_PAGESIZE 4096 /* Just punt and use reasonable value */
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# endif /* NBPC */
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# endif /* NBPG */
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# endif /* EXEC_PAGESIZE */
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# endif /* PAGESIZE */
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#endif /* GNU_OUR_PAGESIZE */
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int
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getpagesize ()
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{
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return (GNU_OUR_PAGESIZE);
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}
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#else /* VMS */
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#if 0 /* older distributions of gcc-vms are missing <syidef.h> */
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#include <syidef.h>
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#endif
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#ifndef SYI$_PAGE_SIZE /* VMS V5.4 and earlier didn't have this yet */
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#define SYI$_PAGE_SIZE 4452
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#endif
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extern unsigned long lib$getsyi(const unsigned short *,...);
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int getpagesize ()
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{
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long pagsiz = 0L;
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unsigned short itmcod = SYI$_PAGE_SIZE;
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(void) lib$getsyi (&itmcod, (void *) &pagsiz);
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if (pagsiz == 0L)
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pagsiz = 512L; /* VAX default */
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return (int) pagsiz;
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}
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#endif /* VMS */
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