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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) 2011 New Dream Network
*
* 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.
*
*/
struct cross_process_sem_data_t;
class CrossProcessSem
{
public:
static int create(int initial_val, CrossProcessSem** ret);
~CrossProcessSem();
/* Initialize the semaphore. Must be called before any operations */
int init();
/* Semaphore wait */
void wait();
/* Semaphore post */
void post();
/* Reinitialize the semaphore to the desired value.
* NOT thread-safe if it is in use at the time!
*/
int reinit(int dval);
private:
explicit CrossProcessSem(struct cross_process_sem_data_t *data);
struct cross_process_sem_data_t *m_data;
};
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