61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
/* $XFree86: xc/lib/Xaw/OS.c,v 1.2 1998/12/06 11:24:32 dawes Exp $ */
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/* Some OS-dependent utility code */
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#include <X11/Xosdefs.h>
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#include <X11/IntrinsicP.h>
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#include "Private.h"
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#ifndef X_NOT_POSIX
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#include <unistd.h> /* for sysconf(), and getpagesize() */
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#endif
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#if defined(linux)
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#include <asm/page.h> /* for PAGE_SIZE */
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#define HAS_GETPAGESIZE
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#define HAS_SC_PAGESIZE /* _SC_PAGESIZE may be an enum for Linux */
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#endif
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#if defined(CSRG_BASED)
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#define HAS_GETPAGESIZE
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#endif
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#if defined(sun)
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#define HAS_GETPAGESIZE
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#endif
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int
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_XawGetPageSize()
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{
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static int pagesize = -1;
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if (pagesize != -1)
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return pagesize;
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/* Try each supported method in the preferred order */
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#if defined(_SC_PAGESIZE) || defined(HAS_SC_PAGESIZE)
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pagesize = sysconf(_SC_PAGESIZE);
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#endif
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#ifdef _SC_PAGE_SIZE
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if (pagesize == -1)
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pagesize = sysconf(_SC_PAGE_SIZE);
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#endif
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#ifdef HAS_GETPAGESIZE
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if (pagesize == -1)
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pagesize = getpagesize();
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#endif
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#ifdef PAGE_SIZE
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if (pagesize == -1)
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pagesize = PAGE_SIZE;
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#endif
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if (pagesize == -1)
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pagesize = 0;
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return pagesize;
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}
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