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1275 |
phoenix |
#ifndef _LOCKHELP_H
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#define _LOCKHELP_H
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#include <linux/config.h>
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#include <linux/spinlock.h>
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#include <asm/atomic.h>
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#include <linux/interrupt.h>
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#include <linux/smp.h>
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/* Header to do help in lock debugging. */
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#ifdef CONFIG_NETFILTER_DEBUG
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struct spinlock_debug
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{
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spinlock_t l;
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atomic_t locked_by;
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};
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struct rwlock_debug
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{
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rwlock_t l;
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long read_locked_map;
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long write_locked_map;
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};
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#define DECLARE_LOCK(l) \
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struct spinlock_debug l = { SPIN_LOCK_UNLOCKED, ATOMIC_INIT(-1) }
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#define DECLARE_LOCK_EXTERN(l) \
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extern struct spinlock_debug l
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#define DECLARE_RWLOCK(l) \
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struct rwlock_debug l = { RW_LOCK_UNLOCKED, 0, 0 }
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#define DECLARE_RWLOCK_EXTERN(l) \
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extern struct rwlock_debug l
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#define MUST_BE_LOCKED(l) \
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do { if (atomic_read(&(l)->locked_by) != smp_processor_id()) \
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printk("ASSERT %s:%u %s unlocked\n", __FILE__, __LINE__, #l); \
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} while(0)
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#define MUST_BE_UNLOCKED(l) \
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do { if (atomic_read(&(l)->locked_by) == smp_processor_id()) \
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printk("ASSERT %s:%u %s locked\n", __FILE__, __LINE__, #l); \
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} while(0)
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/* Write locked OK as well. */
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#define MUST_BE_READ_LOCKED(l) \
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do { if (!((l)->read_locked_map & (1UL << smp_processor_id())) \
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&& !((l)->write_locked_map & (1UL << smp_processor_id()))) \
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printk("ASSERT %s:%u %s not readlocked\n", __FILE__, __LINE__, #l); \
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} while(0)
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#define MUST_BE_WRITE_LOCKED(l) \
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do { if (!((l)->write_locked_map & (1UL << smp_processor_id()))) \
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printk("ASSERT %s:%u %s not writelocked\n", __FILE__, __LINE__, #l); \
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} while(0)
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#define MUST_BE_READ_WRITE_UNLOCKED(l) \
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do { if ((l)->read_locked_map & (1UL << smp_processor_id())) \
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printk("ASSERT %s:%u %s readlocked\n", __FILE__, __LINE__, #l); \
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else if ((l)->write_locked_map & (1UL << smp_processor_id())) \
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printk("ASSERT %s:%u %s writelocked\n", __FILE__, __LINE__, #l); \
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} while(0)
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#define LOCK_BH(lk) \
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do { \
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MUST_BE_UNLOCKED(lk); \
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spin_lock_bh(&(lk)->l); \
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atomic_set(&(lk)->locked_by, smp_processor_id()); \
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} while(0)
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#define UNLOCK_BH(lk) \
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do { \
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MUST_BE_LOCKED(lk); \
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atomic_set(&(lk)->locked_by, -1); \
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spin_unlock_bh(&(lk)->l); \
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} while(0)
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#define READ_LOCK(lk) \
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do { \
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MUST_BE_READ_WRITE_UNLOCKED(lk); \
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read_lock_bh(&(lk)->l); \
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set_bit(smp_processor_id(), &(lk)->read_locked_map); \
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} while(0)
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#define WRITE_LOCK(lk) \
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do { \
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MUST_BE_READ_WRITE_UNLOCKED(lk); \
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write_lock_bh(&(lk)->l); \
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set_bit(smp_processor_id(), &(lk)->write_locked_map); \
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} while(0)
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#define READ_UNLOCK(lk) \
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do { \
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if (!((lk)->read_locked_map & (1UL << smp_processor_id()))) \
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printk("ASSERT: %s:%u %s not readlocked\n", \
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__FILE__, __LINE__, #lk); \
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clear_bit(smp_processor_id(), &(lk)->read_locked_map); \
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read_unlock_bh(&(lk)->l); \
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} while(0)
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#define WRITE_UNLOCK(lk) \
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do { \
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MUST_BE_WRITE_LOCKED(lk); \
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clear_bit(smp_processor_id(), &(lk)->write_locked_map); \
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write_unlock_bh(&(lk)->l); \
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} while(0)
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#else
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#define DECLARE_LOCK(l) spinlock_t l = SPIN_LOCK_UNLOCKED
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#define DECLARE_LOCK_EXTERN(l) extern spinlock_t l
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#define DECLARE_RWLOCK(l) rwlock_t l = RW_LOCK_UNLOCKED
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#define DECLARE_RWLOCK_EXTERN(l) extern rwlock_t l
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#define MUST_BE_LOCKED(l)
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#define MUST_BE_UNLOCKED(l)
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#define MUST_BE_READ_LOCKED(l)
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#define MUST_BE_WRITE_LOCKED(l)
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#define MUST_BE_READ_WRITE_UNLOCKED(l)
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#define LOCK_BH(l) spin_lock_bh(l)
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#define UNLOCK_BH(l) spin_unlock_bh(l)
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#define READ_LOCK(l) read_lock_bh(l)
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#define WRITE_LOCK(l) write_lock_bh(l)
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#define READ_UNLOCK(l) read_unlock_bh(l)
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#define WRITE_UNLOCK(l) write_unlock_bh(l)
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#endif /*CONFIG_NETFILTER_DEBUG*/
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#endif /* _LOCKHELP_H */
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