mars/brick_locks.h

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// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
#ifndef BRICK_LOCKS_H
#define BRICK_LOCKS_H
#include <linux/spinlock.h>
#include "brick_say.h"
#ifdef CONFIG_DEBUG_SPINLOCK
#include <linux/sched.h>
# define LOCK_CHECK(OP) \
({ \
if (atomic_read(&current->lock_count)) { \
BRICK_ERR("never call " #OP "() with a spinlock held.\n"); \
} \
})
# define traced_lock(spinlock,flags) \
do { \
if (atomic_read(&current->lock_count)) { \
BRICK_ERR("please do not nest spinlocks at line %d, reorganize your code.\n", __LINE__); \
} \
atomic_inc(&current->lock_count); \
(void)flags; \
spin_lock_irqsave(spinlock, flags); \
} while (0)
# define traced_unlock(spinlock,flags) \
do { \
spin_unlock_irqrestore(spinlock, flags); \
atomic_dec(&current->lock_count); \
} while (0)
# define traced_readlock(spinlock,flags) \
do { \
if (atomic_read(&current->lock_count)) { \
BRICK_ERR("please do not nest spinlocks at line %d, reorganize your code.\n", __LINE__); \
} \
atomic_inc(&current->lock_count); \
(void)flags; \
read_lock(spinlock); \
} while (0)
# define traced_readunlock(spinlock,flags) \
do { \
/*spin_unlock_irqrestore(spinlock,flags);*/ \
read_unlock(spinlock); \
atomic_dec(&current->lock_count); \
} while (0)
# define traced_writelock(spinlock,flags) \
do { \
if (atomic_read(&current->lock_count)) { \
BRICK_ERR("please do not nest spinlocks at line %d, reorganize your code.\n", __LINE__); \
} \
atomic_inc(&current->lock_count); \
(void)flags; \
write_lock(spinlock); \
} while (0)
# define traced_writeunlock(spinlock,flags) \
do { \
/*spin_unlock_irqrestore(spinlock,flags);*/ \
write_unlock(spinlock); \
atomic_dec(&current->lock_count); \
} while (0)
#else
# define LOCK_CHECK(OP) 0
#if 0
# define traced_lock(spinlock,flags) spin_lock_irqsave(spinlock,flags)
# define traced_unlock(spinlock,flags) spin_unlock_irqrestore(spinlock,flags)
# define traced_readlock(spinlock,flags) read_lock_irqsave(spinlock,flags)
# define traced_readunlock(spinlock,flags) read_unlock_irqrestore(spinlock,flags)
# define traced_writelock(spinlock,flags) write_lock_irqsave(spinlock,flags)
# define traced_writeunlock(spinlock,flags) write_unlock_irqrestore(spinlock,flags)
#else
# define traced_lock(spinlock,flags) do { (void)flags; spin_lock(spinlock); } while (0)
# define traced_unlock(spinlock,flags) do { (void)flags; spin_unlock(spinlock); } while (0)
# define traced_readlock(spinlock,flags) do { (void)flags; read_lock(spinlock); } while (0)
# define traced_readunlock(spinlock,flags) do { (void)flags; read_unlock(spinlock); } while (0)
# define traced_writelock(spinlock,flags) do { (void)flags; write_lock(spinlock); } while (0)
# define traced_writeunlock(spinlock,flags) do { (void)flags; write_unlock(spinlock); } while (0)
#endif
#endif
#endif