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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_Sem_Posix__H
#define CEPH_Sem_Posix__H
#include "common/ceph_mutex.h"
class Semaphore
{
ceph::mutex m = ceph::make_mutex("Semaphore::m");
ceph::condition_variable c;
int count = 0;
public:
void Put()
{
std::lock_guard l(m);
count++;
c.notify_all();
}
void Get()
{
std::unique_lock l(m);
while(count <= 0) {
c.wait(l);
}
count--;
}
};
#endif // !_Mutex_Posix_
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