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/*
* $smu-mark$
* $name: memlock.c$
* $other_author: Alfonso De Gregorio <dira@speedcom.it>
* $other_copyright: Copyright (C) 1999 by Alfonso De Gregorio
* $license: This software is under GPL version 2 of license$
* $date: Fri Nov 5 11:55:48 MET 1999$
* $rev: 2$
*/
/* $Id: memlock.c,v 1.2 2003/09/01 00:22:06 antirez Exp $ */
#include <unistd.h>
#include <sys/mman.h>
int memlock(char *addr, size_t size)
{
#ifdef _POSIX_MEMLOCK_RANGE
unsigned long page_offset, page_size;
page_size = sysconf(_SC_PAGESIZE); /* also <limits.h> .. */
page_offset = (unsigned long) addr % page_size;
addr -= page_offset;
size += page_offset;
return ( mlock(addr, size) );
#endif
return (-1);
}
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