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xrdp-proprietary/sesman/lock.c

88 lines
2.4 KiB

/*
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
session manager
linux only
*/
#include "sesman.h"
#include <semaphore.h>
#include <pthread.h>
pthread_mutex_t lock_chain; /* session chain lock */
pthread_mutexattr_t lock_chain_attr; /* mutex attributes */
pthread_mutex_t lock_config; /* configuration access lock */
pthread_mutexattr_t lock_config_attr; /* mutex attributes */
sem_t lock_socket;
void DEFAULT_CC
lock_init(void)
{
/* initializing socket lock */
sem_init(&lock_socket, 0, 1);
/* initializing chain lock */
pthread_mutexattr_init(&lock_chain_attr);
pthread_mutex_init(&lock_chain, &lock_chain_attr);
/* initializing config lock */
pthread_mutexattr_init(&lock_config_attr);
pthread_mutex_init(&lock_config, &lock_config_attr);
}
/******************************************************************************/
void DEFAULT_CC
lock_chain_acquire(void)
{
/*lock the chain*/
LOG_DBG("lock_chain_acquire()",0);
pthread_mutex_lock(&lock_chain);
}
/******************************************************************************/
void DEFAULT_CC
lock_chain_release(void)
{
/*unlock the chain*/
LOG_DBG("lock_chain_release()",0);
pthread_mutex_unlock(&lock_chain);
}
/******************************************************************************/
void DEFAULT_CC
lock_socket_acquire(void)
{
/* lock socket variable */
LOG_DBG("lock_socket_acquire()",0);
sem_wait(&lock_socket);
}
/******************************************************************************/
void DEFAULT_CC
lock_socket_release(void)
{
/* unlock socket variable */
LOG_DBG("lock_socket_release()",0);
sem_post(&lock_socket);
}