vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
/* Emulation of getpagesize() for systems that need it. */
|
|
|
|
/*
|
|
|
|
@deftypefn Supplemental int getpagesize (void)
|
|
|
|
Returns the number of bytes in a page of memory. This is the
|
|
granularity of many of the system memory management routines. No
|
|
guarantee is made as to whether or not it is the same as the basic
|
|
memory management hardware page size.
|
|
|
|
@end deftypefn
|
|
|
|
BUGS
|
|
|
|
Is intended as a reasonable replacement for systems where this
|
|
is not provided as a system call. The value of 4096 may or may
|
|
not be correct for the systems where it is returned as the default
|
|
value.
|
|
|
|
*/
|
|
|
|
#ifndef VMS
|
|
|
|
#include "config.h"
|
|
|
|
#include <sys/types.h>
|
|
#ifdef HAVE_SYS_PARAM_H
|
|
#include <sys/param.h>
|
|
#endif
|
|
|
|
#undef GNU_OUR_PAGESIZE
|
|
#if defined (HAVE_SYSCONF) && defined (HAVE_UNISTD_H)
|
|
#include <unistd.h>
|
|
#ifdef _SC_PAGESIZE
|
|
#define GNU_OUR_PAGESIZE sysconf(_SC_PAGESIZE)
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef GNU_OUR_PAGESIZE
|
|
# ifdef PAGESIZE
|
|
# define GNU_OUR_PAGESIZE PAGESIZE
|
|
# else /* no PAGESIZE */
|
|
# ifdef EXEC_PAGESIZE
|
|
# define GNU_OUR_PAGESIZE EXEC_PAGESIZE
|
|
# else /* no EXEC_PAGESIZE */
|
|
# ifdef NBPG
|
|
# define GNU_OUR_PAGESIZE (NBPG * CLSIZE)
|
|
# ifndef CLSIZE
|
|
# define CLSIZE 1
|
|
# endif /* CLSIZE */
|
|
# else /* no NBPG */
|
|
# ifdef NBPC
|
|
# define GNU_OUR_PAGESIZE NBPC
|
|
# else /* no NBPC */
|
|
# define GNU_OUR_PAGESIZE 4096 /* Just punt and use reasonable value */
|
|
# endif /* NBPC */
|
|
# endif /* NBPG */
|
|
# endif /* EXEC_PAGESIZE */
|
|
# endif /* PAGESIZE */
|
|
#endif /* GNU_OUR_PAGESIZE */
|
|
|
|
int
|
|
getpagesize (void)
|
|
{
|
|
return (GNU_OUR_PAGESIZE);
|
|
}
|
|
|
|
#else /* VMS */
|
|
|
|
#if 0 /* older distributions of gcc-vms are missing <syidef.h> */
|
|
#include <syidef.h>
|
|
#endif
|
|
#ifndef SYI$_PAGE_SIZE /* VMS V5.4 and earlier didn't have this yet */
|
|
#define SYI$_PAGE_SIZE 4452
|
|
#endif
|
|
extern unsigned long lib$getsyi(const unsigned short *,...);
|
|
|
|
int getpagesize (void)
|
|
{
|
|
long pagsiz = 0L;
|
|
unsigned short itmcod = SYI$_PAGE_SIZE;
|
|
|
|
(void) lib$getsyi (&itmcod, (void *) &pagsiz);
|
|
if (pagsiz == 0L)
|
|
pagsiz = 512L; /* VAX default */
|
|
return (int) pagsiz;
|
|
}
|
|
|
|
#endif /* VMS */
|