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https://github.com/ceph/ceph
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9213a23f14
git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@1138 29311d96-e01e-0410-9327-a35deaab8ce9
53 lines
790 B
C++
53 lines
790 B
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef _Sem_Posix_
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#define _Sem_Posix_
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#include <cassert>
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class Semaphore
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{
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Mutex m;
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Cond c;
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int count;
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public:
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Semaphore()
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{
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count = 0;
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}
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void Put()
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{
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m.Lock();
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count++;
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c.Signal();
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m.Unlock();
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}
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void Get()
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{
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m.Lock();
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while(count <= 0) {
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c.Wait(m);
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}
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count--;
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m.Unlock();
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}
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};
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#endif // !_Mutex_Posix_
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