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/*
* Copyright (C) 2013, 2015 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained from Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __MALI_SPINLOCK_REENTRANT_H__
#define __MALI_SPINLOCK_REENTRANT_H__
#include "mali_osk.h"
#include "mali_kernel_common.h"
/**
* Reentrant spinlock.
*/
struct mali_spinlock_reentrant {
_mali_osk_spinlock_irq_t *lock;
u32 owner;
u32 counter;
};
/**
* Create a new reentrant spinlock.
*
* @param lock_order Lock order.
* @return New reentrant spinlock.
*/
struct mali_spinlock_reentrant *mali_spinlock_reentrant_init(_mali_osk_lock_order_t lock_order);
/**
* Terminate reentrant spinlock and free any associated resources.
*
* @param spinlock Reentrant spinlock to terminate.
*/
void mali_spinlock_reentrant_term(struct mali_spinlock_reentrant *spinlock);
/**
* Wait for reentrant spinlock to be signaled.
*
* @param spinlock Reentrant spinlock.
* @param tid Thread ID.
*/
void mali_spinlock_reentrant_wait(struct mali_spinlock_reentrant *spinlock, u32 tid);
/**
* Signal reentrant spinlock.
*
* @param spinlock Reentrant spinlock.
* @param tid Thread ID.
*/
void mali_spinlock_reentrant_signal(struct mali_spinlock_reentrant *spinlock, u32 tid);
/**
* Check if thread is holding reentrant spinlock.
*
* @param spinlock Reentrant spinlock.
* @param tid Thread ID.
* @return MALI_TRUE if thread is holding spinlock, MALI_FALSE if not.
*/
MALI_STATIC_INLINE mali_bool mali_spinlock_reentrant_is_held(struct mali_spinlock_reentrant *spinlock, u32 tid)
{
MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
return (tid == spinlock->owner && 0 < spinlock->counter);
}
#endif /* __MALI_SPINLOCK_REENTRANT_H__ */
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