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/**************************************************************************
*
* $Id: mbgmutex.h 1.3.1.2 2014/03/04 12:08:12Z martin TEST $
*
* Copyright (c) Meinberg Funkuhren, Bad Pyrmont, Germany
*
* Description:
* Portable macros to deal with spinlocks, mutexes,
* and critical sections.
*
* -----------------------------------------------------------------------
* $Log: mbgmutex.h $
* Revision 1.3.1.2 2014/03/04 12:08:12Z martin
* Revision 1.3.1.1 2014/01/08 17:20:57Z martin
* MBG_TGT_POSIX
* Revision 1.3 2013/04/11 13:46:58 martin
* Use non-specific spinlock function under Windows.
* Revision 1.2 2012/03/08 12:19:01Z martin
* Fixes for Linux kernel and FreeBSD.
* Fixed build under DOS and QNX usinc dummy defines.
* Don't define macros for semaphore destroy functions
* if not required/supported on the target OS.
* Revision 1.1 2011/04/15 12:26:59 martin
* Initial revision.
*
**************************************************************************/
#ifndef _MBGMUTEX_H
#define _MBGMUTEX_H
/* Other headers to be included */
#include <mbg_tgt.h>
#include <words.h>
#ifdef _MBGMUTEX
#define _ext
#define _DO_INIT
#else
#define _ext extern
#endif
/* Start of header body */
#if defined( MBG_TGT_KERNEL ) // definitions used in kernel space
#if defined( MBG_TGT_WIN32 ) // Windows kernel space
typedef KSPIN_LOCK MBG_SPINLOCK;
#define _mbg_spin_lock_init( _spl ) KeInitializeSpinLock( _spl )
// _mbg_spin_lock_destroy is not supported
#define _mbg_spin_lock_acquire( _spl ) KeAcquireSpinLock( _spl, &OldIrql )
#define _mbg_spin_lock_release( _spl ) KeReleaseSpinLock( _spl, OldIrql )
#define _MBG_SPINLOCK_DEFINED 1
typedef FAST_MUTEX MBG_MUTEX;
#define _mbg_mutex_init( _pmtx ) ExInitializeFastMutex( _pmtx )
// _mbg_mutex_destroy( _pmtx ) is not supported
#define _mbg_mutex_acquire( _pmtx ) ExAcquireFastMutex( _pmtx )
#define _mbg_mutex_release( _pmtx ) ExReleaseFastMutex( _pmtx )
#define _MBG_MUTEX_DEFINED 1
#elif defined( MBG_TGT_LINUX ) // Linux kernel space
#include <linux/spinlock.h>
#include <linux/version.h>
#if ( LINUX_VERSION_CODE >= KERNEL_VERSION( 2, 6, 26 ) )
#include <linux/semaphore.h>
#else
#include <asm/semaphore.h>
#endif
typedef spinlock_t MBG_SPINLOCK;
#define _mbg_spin_lock_init( _spl ) spin_lock_init( _spl )
// _mbg_spin_lock_destroy is not supported
#define _mbg_spin_lock_acquire( _spl ) spin_lock( _spl )
#define _mbg_spin_lock_release( _spl ) spin_unlock( _spl )
#define _MBG_SPINLOCK_DEFINED 1
typedef struct semaphore MBG_MUTEX;
#define _mbg_mutex_init( _pmtx ) sema_init( _pmtx, 1 )
// _mbg_mutex_destroy( _pmtx ) is not supported
#define _mbg_mutex_acquire( _pmtx ) down_interruptible( _pmtx )
#define _mbg_mutex_release( _pmtx ) up( _pmtx )
#define _MBG_MUTEX_DEFINED 1
#elif defined( MBG_TGT_FREEBSD ) // FreeBSD kernel space
#include <sys/lock.h>
#include <sys/mutex.h>
typedef struct mtx MBG_SPINLOCK;
#define _mbg_spin_lock_init( _spl ) mtx_init( _spl, "mbg_spin_lock", NULL, MTX_SPIN )
#define _mbg_spin_lock_destroy( _spl ) mtx_destroy( _spl )
#define _mbg_spin_lock_acquire( _spl ) mtx_lock_spin( _spl )
#define _mbg_spin_lock_release( _spl ) mtx_unlock_spin( _spl )
#define _MBG_SPINLOCK_DEFINED 1
typedef struct mtx MBG_MUTEX;
#define _mbg_mutex_init( _pmtx ) mtx_init( _pmtx, "mbg_mutex", NULL, MTX_DEF )
#define _mbg_mutex_destroy( _pmtx ) mtx_destroy( _pmtx )
#define _mbg_mutex_acquire( _pmtx ) mtx_lock( _pmtx )
#define _mbg_mutex_release( _pmtx ) mtx_unlock( _pmtx )
#define _MBG_MUTEX_DEFINED 1
#elif defined( MBG_TGT_NETBSD )
#include <sys/mutex.h>
// The API used below has been introduced in NetBSD 5.0
// For earlier NetBSD versions see 'man 9 lockinit'.
typedef kmutex_t MBG_SPINLOCK;
#define _mbg_spin_lock_init( _spl ) mutex_init( _spl, MUTEX_DEFAULT, IPL_HIGH )
#define _mbg_spin_lock_destroy( _spl ) mutex_destroy( _spl )
#define _mbg_spin_lock_acquire( _spl ) mutex_spin_enter( _spl )
#define _mbg_spin_lock_release( _spl ) mutex_spin_exit( _spl )
#define _MBG_SPINLOCK_DEFINED 1
typedef kmutex_t MBG_MUTEX;
#define _mbg_mutex_init( _pmtx ) mutex_init( _pmtx, MUTEX_DEFAULT, IPL_NONE )
#define _mbg_mutex_destroy( _spl ) mutex_destroy( _spl )
#define _mbg_mutex_acquire( _pmtx ) mutex_enter( _pmtx )
#define _mbg_mutex_release( _pmtx ) mutex_exit( _pmtx )
#define _MBG_MUTEX_DEFINED 1
#endif
#else // user space applications
#if defined( MBG_TGT_WIN32 ) // Windows user space
// definitions used with mutexes
typedef HANDLE MBG_MUTEX;
#define _mbg_mutex_init( _pm ) *(_pm) = CreateMutex( NULL, FALSE, NULL )
#define _mbg_mutex_destroy( _pm ) CloseHandle( *(_pm) ); *(_pm) = INVALID_HANDLE_VALUE
#define _mbg_mutex_acquire( _pm ) WaitForSingleObject( *(_pm), INFINITE )
#define _mbg_mutex_release( _pm ) ReleaseMutex( *(_pm) )
#define _MBG_MUTEX_DEFINED 1
// definitions used with critical sections
typedef CRITICAL_SECTION MBG_CRIT_SECT;
#define _mbg_crit_sect_init( _pcs ) InitializeCriticalSection( (_pcs) )
#define _mbg_crit_sect_destroy( _pcs ) DeleteCriticalSection( (_pcs) )
#define _mbg_crit_sect_enter( _pcs ) EnterCriticalSection( (_pcs) )
#define _mbg_crit_sect_leave( _pcs ) LeaveCriticalSection( (_pcs) )
#define _MBG_CRIT_SECT_DEFINED 1
#elif defined( MBG_TGT_POSIX ) // Unix user space use pthread library
#include <pthread.h>
// Mutex types:
// PTHREAD_MUTEX_INITIALIZER /* Fast */
// PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP /* Recursive */
// PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP /* Errorcheck */
typedef pthread_mutex_t MBG_MUTEX;
#define _mbg_mutex_init( _pm ) pthread_mutex_init( (_pm), NULL )
#define _mbg_mutex_destroy( _pm ) pthread_mutex_destroy( (_pm) )
#define _mbg_mutex_acquire( _pm ) pthread_mutex_lock( (_pm) )
#define _mbg_mutex_release( _pm ) pthread_mutex_unlock( (_pm) )
#define _MBG_MUTEX_DEFINED 1
// For critical sections use defaults specified below
#elif defined( MBG_TGT_DOS ) || defined( MBG_TGT_QNX )
typedef int MBG_MUTEX; // just a dummy declaration
#define _MBG_MUTEX_DEFINED 1
#endif
#endif
#if !defined( _MBG_SPINLOCK_DEFINED )
#define _mbg_spin_lock_init( _spl ) _nop_macro_fnc()
// _mbg_spin_lock_destroy is not supported
#define _mbg_spin_lock_acquire( _spl ) _nop_macro_fnc()
#define _mbg_spin_lock_release( _spl ) _nop_macro_fnc()
#endif
#if !defined( _MBG_MUTEX_DEFINED )
#define _MBG_MUTEX_DEFINED 1
typedef MBG_CRIT_SECT MBG_MUTEX;
#define _mbg_mutex_init( _pm ) _nop_macro_fnc()
// _mbg_mutex_destroy( _pmtx ) is not supported
#define _mbg_mutex_acquire( _pm ) _nop_macro_fnc()
#define _mbg_mutex_release( _pm ) _nop_macro_fnc()
#endif
#if !defined( _MBG_CRIT_SECT_DEFINED )
// use mutex by default, e.g. with the pthread library
#define _MBG_CRIT_SECT_DEFINED 1
typedef MBG_MUTEX MBG_CRIT_SECT;
#define _mbg_crit_sect_init _mbg_mutex_init
#if defined( _mbg_mutex_destroy )
#define _mbg_crit_sect_destroy _mbg_mutex_destroy
#endif
#define _mbg_crit_sect_enter _mbg_mutex_acquire
#define _mbg_crit_sect_leave _mbg_mutex_release
#endif
/* function prototypes: */
#ifdef __cplusplus
extern "C" {
#endif
/* ----- function prototypes begin ----- */
/* This section was generated automatically */
/* by MAKEHDR, do not remove the comments. */
/* (no header definitions found) */
/* ----- function prototypes end ----- */
#ifdef __cplusplus
}
#endif
/* End of header body */
#undef _ext
#undef _DO_INIT
#endif /* _MBGMUTEX_H */
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