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/**
* @file
*
* @brief Function Unlocks a Spin Lock Object
* @ingroup POSIXAPI
*/
/*
* POSIX Spinlock Manager -- Wait at a Spinlock
*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* Copyright (c) 2016 embedded brains GmbH
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/posix/spinlockimpl.h>
int pthread_spin_unlock( pthread_spinlock_t *lock )
{
POSIX_Spinlock_Control *the_spinlock;
ISR_Level level;
the_spinlock = _POSIX_Spinlock_Get( lock );
level = the_spinlock->interrupt_state;
#if defined(POSIX_SPINLOCKS_ARE_SELF_CONTAINED)
#if defined(RTEMS_SMP)
_SMP_ticket_lock_Release(
&the_spinlock->Lock,
&_Per_CPU_Get()->Lock_stats_context
);
#endif
_ISR_Local_enable( level );
#else
if ( --_POSIX_Spinlock_Nest_level == 0 ) {
#if defined(RTEMS_SMP)
_POSIX_Spinlock_Owner = 0xffffffff;
_SMP_ticket_lock_Release(
&the_spinlock->Lock,
&_Per_CPU_Get()->Lock_stats_context
);
#endif
_ISR_Local_enable( level );
}
#endif
return 0;
}
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