/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Wait at a Spinlock
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* Copyright (c) 2016 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/posix/spinlockimpl.h>
RTEMS_STATIC_ASSERT(
#if defined(RTEMS_SMP)
offsetof( POSIX_Spinlock_Control, Lock.next_ticket )
#else
offsetof( POSIX_Spinlock_Control, reserved[ 0 ] )
#endif
== offsetof( pthread_spinlock_t, _Lock._next_ticket ),
POSIX_SPINLOCK_T_LOCK_NEXT_TICKET
);
RTEMS_STATIC_ASSERT(
#if defined(RTEMS_SMP)
offsetof( POSIX_Spinlock_Control, Lock.now_serving )
#else
offsetof( POSIX_Spinlock_Control, reserved[ 1 ] )
#endif
== offsetof( pthread_spinlock_t, _Lock._now_serving ),
POSIX_SPINLOCK_T_LOCK_NOW_SERVING
);
RTEMS_STATIC_ASSERT(
offsetof( POSIX_Spinlock_Control, interrupt_state )
== offsetof( pthread_spinlock_t, _interrupt_state ),
POSIX_SPINLOCK_T_INTERRUPT_STATE
);
RTEMS_STATIC_ASSERT(
sizeof( POSIX_Spinlock_Control ) == sizeof( pthread_spinlock_t ),
POSIX_SPINLOCK_T_SIZE
);
int pthread_spin_lock( pthread_spinlock_t *spinlock )
{
POSIX_Spinlock_Control *the_spinlock;
ISR_Level level;
#if defined(RTEMS_SMP) && defined(RTEMS_PROFILING)
SMP_lock_Stats unused_stats;
SMP_lock_Stats_context unused_context;
#endif
the_spinlock = _POSIX_Spinlock_Get( spinlock );
_ISR_Local_disable( level );
#if defined(RTEMS_SMP)
_SMP_ticket_lock_Acquire(
&the_spinlock->Lock,
&unused_stats,
&unused_context
);
#endif
the_spinlock->interrupt_state = level;
return 0;
}
int pthread_spin_trylock( pthread_spinlock_t *spinlock )
RTEMS_ALIAS( pthread_spin_lock );
