59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/* Some OS-dependent utility code */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
#include <X11/Xosdefs.h>
|
|
#include <X11/IntrinsicP.h>
|
|
#include "Private.h"
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h> /* for sysconf(), and getpagesize() */
|
|
#endif
|
|
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
/* AC_CHECK_FUNCS([getpagesize]) may report a false positive for
|
|
getpagesize() when using MinGW gcc, since it's present in libgcc.a */
|
|
#undef HAVE_GETPAGESIZE
|
|
#endif
|
|
|
|
#if defined(linux)
|
|
/* kernel header doesn't work with -ansi */
|
|
/* #include <asm/page.h> *//* for PAGE_SIZE */
|
|
#define HAS_SC_PAGESIZE /* _SC_PAGESIZE may be an enum for Linux */
|
|
#endif
|
|
|
|
int
|
|
_XawGetPageSize(void)
|
|
{
|
|
static int pagesize = -1;
|
|
|
|
if (pagesize != -1)
|
|
return pagesize;
|
|
|
|
/* Try each supported method in the preferred order */
|
|
|
|
#if defined(_SC_PAGESIZE) || defined(HAS_SC_PAGESIZE)
|
|
pagesize = (int) sysconf(_SC_PAGESIZE);
|
|
#endif
|
|
|
|
#ifdef _SC_PAGE_SIZE
|
|
if (pagesize == -1)
|
|
pagesize = (int) sysconf(_SC_PAGE_SIZE);
|
|
#endif
|
|
|
|
#ifdef HAVE_GETPAGESIZE
|
|
if (pagesize == -1)
|
|
pagesize = getpagesize();
|
|
#endif
|
|
|
|
#ifdef PAGE_SIZE
|
|
if (pagesize == -1)
|
|
pagesize = PAGE_SIZE;
|
|
#endif
|
|
|
|
if (pagesize == -1)
|
|
pagesize = 0;
|
|
|
|
return pagesize;
|
|
}
|