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/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2005-2007
*/
#ifndef LOCK_H
#define LOCK_H
#include "sesman.h"
#define SESMAN_LOCK_FORK_BLOCKER 1
#define SESMAN_LOCK_FORK_WAITING 0
/**
*
* @brief initializes all the locks
*
*/
void DEFAULT_CC
lock_init();
/**
*
* @brief acquires the lock for the session chain
*
*/
void DEFAULT_CC
lock_chain_acquire();
/**
*
* @brief releases the sessiona chain lock
*
*/
void DEFAULT_CC
lock_chain_release();
/**
*
* @brief acquires config lock
*
*/
void DEFAULT_CC
lock_cfg_acquire();
/**
*
* @brief releases config lock
*
*/
void DEFAULT_CC
lock_cfg_release();
/**
*
* @brief request the socket lock
*
*/
void DEFAULT_CC
lock_socket_acquire();
/**
*
* @brief releases the socket lock
*
*/
void DEFAULT_CC
lock_socket_release();
/**
*
* @brief requires to fork a new child process
*
*/
void DEFAULT_CC
lock_fork_request();
/**
*
* @brief releases a fork() request
*
*/
void DEFAULT_CC
lock_fork_release();
/**
*
* @brief starts a section that is critical for forking
*
* starts a section that is critical for forking, that is noone can fork()
* while i'm in a critical section. But if someone wanted to fork we have
* to wait until he finishes with lock_fork_release()
*
* @return
*
*/
int DEFAULT_CC
lock_fork_critical_section_start();
/**
*
* @brief closes the critical section
*
*/
void DEFAULT_CC
lock_fork_critical_section_end(int blocking);
#endif
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