30 lines
643 B
C
30 lines
643 B
C
|
/*
|
||
|
|
* $smu-mark$
|
||
|
|
* $name: memlock.c$
|
||
|
|
* $other_author: Alfonso De Gregorio <dira@speedcom.it>
|
||
|
|
* $other_copyright: Copyright (C) 1999 by Alfonso De Gregorio
|
||
|
|
* $license: This software is under GPL version 2 of license$
|
||
|
|
* $date: Fri Nov 5 11:55:48 MET 1999$
|
||
|
|
* $rev: 2$
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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);
|
||
|
|
}
|
||
|
|
|