29 lines
623 B
C
29 lines
623 B
C
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/*
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* $smu-mark$
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* $name: memunlock.c$
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* $other_author: Alfonso De Gregorio <dira@speedcom.it>
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* $other_copyright: Copyright (C) 1999 by Alfonso De Gregorio
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* $license: This software is under GPL version 2 of license$
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* $date: Fri Nov 5 11:55:48 MET 1999$
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* $rev: 2$
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*/
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#include <unistd.h>
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#include <sys/mman.h>
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int memunlock(char *addr, size_t size)
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{
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#ifdef _POSIX_MEMLOCK_RANGE
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unsigned long page_offset, page_size;
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page_size = sysconf(_SC_PAGESIZE);
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page_offset = (unsigned long) addr % page_size;
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addr -= page_offset;
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size += page_offset;
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return ( munlock(addr, size) );
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#endif
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return (-1);
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}
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