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/*
  The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
  Copyright (C) 2001-2012 Aymeric MOIZARD amoizard@antisip.com
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
  
  This library 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
  Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef _OSIP_MT_H_
#define _OSIP_MT_H_

#ifndef OSIP_MONOTHREAD

#include <stdio.h>

/**
 * @file osip_mt.h
 * @brief oSIP Thread, Mutex and Semaphore definitions
 *
 * Those methods are only available if the library is compile
 * in multi threaded mode. This is the default for oSIP.
 */

/**
 * @defgroup oSIP_THREAD oSIP Thread Routines
 * @ingroup osip2_port
 * @{
 */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Structure for referencing a thread
 * @struct osip_thread
 */
  struct osip_thread;

/**
 * Allocate (or initialise if a thread address is given)
 * @param stacksize The stack size of the thread. (20000 is a good value)
 * @param func The method where the thread start.
 * @param arg A pointer on the argument given to the method 'func'.
 */
  struct osip_thread *osip_thread_create (int stacksize, void *(*func) (void *), void *arg);

/**
 * Join a thread.
 * @param thread The thread to join.
 */
  int osip_thread_join (struct osip_thread *thread);

/**
 * Set the priority of a thread. (NOT IMPLEMENTED ON ALL SYSTEMS)
 * @param thread The thread to work on.
 * @param priority The priority value to set.
 */
  int osip_thread_set_priority (struct osip_thread *thread, int priority);
/**
 * Exit from a thread.
 */
  void osip_thread_exit (void);

#ifdef __cplusplus
}
#endif
/** @}
 * @defgroup oSIP_SEMA oSIP semaphore definitions
 * @ingroup osip2_port
 * @{
 */
#ifdef __cplusplus
extern "C" {
#endif

/**
 * Structure for referencing a semaphore element.
 * @struct osip_sem
 */
  struct osip_sem;

/**
 * Allocate and Initialise a semaphore.
 * @param value The initial value for the semaphore.
 */
  struct osip_sem *osip_sem_init (unsigned int value);
/**
 * Destroy a semaphore.
 * @param sem The semaphore to destroy.
 */
  int osip_sem_destroy (struct osip_sem *sem);
/**
 * Post operation on a semaphore.
 * @param sem The semaphore to destroy.
 */
  int osip_sem_post (struct osip_sem *sem);
/**
 * Wait operation on a semaphore.
 * NOTE: this call will block if the semaphore is at 0.
 * @param sem The semaphore to destroy.
 */
  int osip_sem_wait (struct osip_sem *sem);
/**
 * Wait operation on a semaphore.
 * NOTE: if the semaphore is at 0, this call won't block.
 * @param sem The semaphore to destroy.
 */
  int osip_sem_trywait (struct osip_sem *sem);


#ifdef __cplusplus
}
#endif
/** @}
 * @defgroup oSIP_MUTEX oSIP mutex definitions
 * @ingroup osip2_port
 * @{
 */
#ifdef __cplusplus
extern "C" {
#endif

/**
 * Structure for referencing a mutex element.
 * @struct osip_mutex
 */
  struct osip_mutex;

/**
 * Allocate and Initialise a mutex.
 */
  struct osip_mutex *osip_mutex_init (void);
/**
 * Destroy the mutex.
 * @param mut The mutex to destroy.
 */
  void osip_mutex_destroy (struct osip_mutex *mut);
/**
 * Lock the mutex.
 * @param mut The mutex to lock.
 */
  int osip_mutex_lock (struct osip_mutex *mut);
/**
 * Unlock the mutex.
 * @param mut The mutex to unlock.
 */
  int osip_mutex_unlock (struct osip_mutex *mut);

#ifdef __cplusplus
}
#endif
/** @} */
#endif                          /* OSIP_MONOTHREAD */
#endif                          /* end of _THREAD_H_ */