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/*
The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
Copyright (C) 2001,2002,2003 Aymeric MOIZARD jack@atosc.org
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 _SEMA_H_
#define _SEMA_H_
#ifdef OSIP_MT
#include <osip/port.h>
#include <errno.h>
/**
* @file sema.h
* @brief oSIP semaphore definitions
*
* Those methods are only available if the library is compile
* in multi threaded mode. This is the default for oSIP.
*/
/**
* @defgroup oSIP_SEMA oSIP semaphore definitions
* @ingroup oSIP
* @{
*/
#ifdef __cplusplus
extern "C"
{
#endif
#if defined(WIN32) || defined(_WIN32_WCE)
#include <windows.h>
typedef struct
{
HANDLE h;
}
smutex_t;
typedef struct
{
HANDLE h;
}
ssem_t;
#endif
#if (!(defined(WIN32) || defined (_WIN32_WCE)) && defined(__PSOS__))
#include <Types.h>
#include <os.h>
typedef struct
{
UInt32 id;
}
smutex_t;
typedef struct
{
UInt32 id;
}
ssem_t;
#endif
#ifdef __VXWORKS_OS__
#include <semaphore.h>
#include <semLib.h>
typedef struct semaphore smutex_t;
typedef sem_t ssem_t;
#endif
#ifdef __sun__
#include <semaphore.h>
#undef getdate
#include <synch.h>
#endif
/* HAVE_PTHREAD_H is not used any more! I keep it for a while... */
#if defined(HAVE_PTHREAD) || defined(HAVE_PTHREAD_H) || defined(HAVE_PTH_PTHREAD_H)
#include <pthread.h>
/**
* Structure for referencing a semaphore element.
* @defvar smutex_t
*/
typedef pthread_mutex_t smutex_t;
#endif
#if defined(HAVE_SEMAPHORE_H)
#include <semaphore.h>
#ifdef __sun__
#undef getdate
#include <synch.h>
#endif
/**
* Structure for referencing a semaphore element.
* @defvar ssem_t
*/
typedef sem_t ssem_t;
#endif
#if !defined(HAVE_SEMAPHORE_H) && defined(HAVE_SYS_SEM_H)
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
typedef struct _ssem_t
{
int semid;
}
ssem_t;
#endif
#if (!defined(HAVE_SEMAPHORE_H) && !defined(HAVE_SYS_SEM_H) && !defined(WIN32) && !defined(_WIN32_WCE) && !defined(__PSOS__) && !defined(__VXWORKS_OS__))
#error No semaphore implementation found
#endif
/**
* Allocate and Initialise a semaphore.
*/
smutex_t *smutex_init ();
/**
* Destroy the mutex.
* @param mut The mutex to destroy.
*/
void smutex_destroy (smutex_t * mut);
/**
* Lock the mutex.
* @param mut The mutex to lock.
*/
int smutex_lock (smutex_t * mut);
/**
* Unlock the mutex.
* @param mut The mutex to unlock.
*/
int smutex_unlock (smutex_t * mut);
/**
* Allocate and Initialise a semaphore.
* @param value The initial value for the semaphore.
*/
ssem_t *ssem_init (unsigned int value);
/**
* Destroy a semaphore.
* @param sem The semaphore to destroy.
*/
int ssem_destroy (ssem_t * sem);
/**
* Post operation on a semaphore.
* @param sem The semaphore to destroy.
*/
int ssem_post (ssem_t * sem);
/**
* Wait operation on a semaphore.
* NOTE: this call will block if the semaphore is at 0.
* @param sem The semaphore to destroy.
*/
int ssem_wait (ssem_t * 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 ssem_trywait (ssem_t * sem);
#ifdef __cplusplus
}
#endif
/** @} */
#endif /* OSIP_MT */
#endif /* _SEMA_H_ */
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