113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*
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* This file is part of the SPL: Solaris Porting Layer.
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*
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* Copyright (c) 2008 Lawrence Livermore National Security, LLC.
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* Produced at Lawrence Livermore National Laboratory
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* Written by:
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* Brian Behlendorf <behlendorf1@llnl.gov>,
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* Herb Wartens <wartens2@llnl.gov>,
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* Jim Garlick <garlick@llnl.gov>
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* UCRL-CODE-235197
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _SPL_MUTEX_H
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#define _SPL_MUTEX_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <linux/module.h>
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#include <linux/hardirq.h>
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#include <sys/types.h>
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#include <sys/kmem.h>
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#define MUTEX_DEFAULT 0
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#define MUTEX_SPIN 1
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#define MUTEX_ADAPTIVE 2
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#define MUTEX_ENTER_TOTAL 0
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#define MUTEX_ENTER_NOT_HELD 1
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#define MUTEX_ENTER_SPIN 2
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#define MUTEX_ENTER_SLEEP 3
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#define MUTEX_TRYENTER_TOTAL 4
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#define MUTEX_TRYENTER_NOT_HELD 5
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#define MUTEX_STATS_SIZE 6
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#define KM_MAGIC 0x42424242
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#define KM_POISON 0x84
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typedef struct {
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int32_t km_magic;
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int16_t km_type;
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int16_t km_name_size;
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char *km_name;
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struct task_struct *km_owner;
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struct semaphore *km_sem;
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#ifdef DEBUG_MUTEX
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int *km_stats;
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struct list_head km_list;
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#endif
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} kmutex_t;
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extern int mutex_spin_max;
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#ifdef DEBUG_MUTEX
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extern int mutex_stats[MUTEX_STATS_SIZE];
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extern spinlock_t mutex_stats_lock;
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extern struct list_head mutex_stats_list;
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#define MUTEX_STAT_INC(stats, stat) ((stats)[stat]++)
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#else
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#define MUTEX_STAT_INC(stats, stat)
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#endif
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int spl_mutex_init(void);
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void spl_mutex_fini(void);
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extern int __spl_mutex_init(kmutex_t *mp, char *name, int type, void *ibc);
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extern void __spl_mutex_destroy(kmutex_t *mp);
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extern int __mutex_tryenter(kmutex_t *mp);
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extern void __mutex_enter(kmutex_t *mp);
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extern void __mutex_exit(kmutex_t *mp);
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extern int __mutex_owned(kmutex_t *mp);
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extern kthread_t *__spl_mutex_owner(kmutex_t *mp);
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#undef mutex_init
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#undef mutex_destroy
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#define mutex_init(mp, name, type, ibc) \
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({ \
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/* May never fail or all subsequent mutex_* calls will ASSERT */\
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if ((name) == NULL) \
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while(__spl_mutex_init(mp, #mp, type, ibc)); \
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else \
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while(__spl_mutex_init(mp, name, type, ibc)); \
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})
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#define mutex_destroy(mp) __spl_mutex_destroy(mp)
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#define mutex_tryenter(mp) __mutex_tryenter(mp)
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#define mutex_enter(mp) __mutex_enter(mp)
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#define mutex_exit(mp) __mutex_exit(mp)
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#define mutex_owned(mp) __mutex_owned(mp)
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#define mutex_owner(mp) __spl_mutex_owner(mp)
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#define MUTEX_HELD(mp) mutex_owned(mp)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SPL_MUTEX_H */
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