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42 lines
759 B
C
42 lines
759 B
C
/* Emulate getpagesize on systems that lack it. */
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#ifndef HAVE_GETPAGESIZE
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#if !defined getpagesize && defined _SC_PAGESIZE
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# if !(defined VMS && __VMS_VER < 70000000)
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# define getpagesize() sysconf (_SC_PAGESIZE)
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# endif
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#endif
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#if !defined getpagesize && defined VMS
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# ifdef __ALPHA
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# define getpagesize() 8192
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# else
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# define getpagesize() 512
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# endif
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#endif
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#ifndef getpagesize
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# include <sys/param.h>
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# ifdef EXEC_PAGESIZE
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# define getpagesize() EXEC_PAGESIZE
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# else
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# ifdef NBPG
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# ifndef CLSIZE
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# define CLSIZE 1
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# endif
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# define getpagesize() (NBPG * CLSIZE)
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# else
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# ifdef NBPC
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# define getpagesize() NBPC
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# endif
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# endif
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# endif
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#endif
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#endif /* not HAVE_GETPAGESIZE */
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