zynaddsubfx

ZynAddSubFX open source synthesizer
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MemLocker.cpp (1364B)

      1 /*
      2   ZynAddSubFX - a software synthesizer
      3 
      4   MemLocker.cpp - Memory page locker
      5   Copyright (C) 2019-2019 Johannes Lorenz
      6 
      7   This program is free software; you can redistribute it and/or modify
      8   it under the terms of version 2 of the GNU General Public License
      9   as published by the Free Software Foundation.
     10 
     11   This program is distributed in the hope that it will be useful,
     12   but WITHOUT ANY WARRANTY; without even the implied warranty of
     13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14   GNU General Public License (version 2 or later) for more details.
     15 
     16   You should have received a copy of the GNU General Public License (version 2)
     17   along with this program; if not, write to the Free Software Foundation,
     18   Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
     19 
     20 */
     21 
     22 #include "MemLocker.h"
     23 
     24 #ifndef WIN32
     25 #include <cstdio>
     26 #include <sys/mman.h>
     27 #endif
     28 
     29 namespace zyn {
     30 
     31 void MemLocker::lock()
     32 {
     33 #ifndef WIN32
     34     if (!isLocked)
     35     {
     36         if (mlockall (MCL_CURRENT | MCL_FUTURE)) {
     37             perror ("Warning: Can not lock memory");
     38         } else {
     39             isLocked = true;
     40         }
     41     }
     42 #endif
     43 }
     44 
     45 void MemLocker::unlock()
     46 {
     47 #ifndef WIN32
     48     if (isLocked)
     49     {
     50         if (munlockall ()) {
     51             perror ("Warning: Can not unlock memory");
     52         } else {
     53             isLocked = false;
     54         }
     55     }
     56 #endif
     57 }
     58 
     59 }