43 lines
2.0 KiB
C
43 lines
2.0 KiB
C
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/****************************************************************************
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****************************************************************************
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***
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*** This header was automatically generated from a Linux kernel header
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*** of the same name, to make information necessary for userspace to
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*** call into the kernel available to libc. It contains only constants,
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*** structures, and macros generated from the original header, and thus,
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*** contains no copyrightable information.
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***
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****************************************************************************
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****************************************************************************/
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#ifndef __LINUX_SEQLOCK_H
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#define __LINUX_SEQLOCK_H
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#include <linux/spinlock.h>
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#include <linux/preempt.h>
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typedef struct {
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unsigned sequence;
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spinlock_t lock;
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} seqlock_t;
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#define __SEQLOCK_UNLOCKED(lockname) { 0, __SPIN_LOCK_UNLOCKED(lockname) }
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#define SEQLOCK_UNLOCKED __SEQLOCK_UNLOCKED(old_style_seqlock_init)
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#define seqlock_init(x) do { *(x) = (seqlock_t) __SEQLOCK_UNLOCKED(x); } while (0)
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#define DEFINE_SEQLOCK(x) seqlock_t x = __SEQLOCK_UNLOCKED(x)
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#define SEQCNT_ZERO { 0 }
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#define seqcount_init(x) do { *(x) = (seqcount_t) SEQCNT_ZERO; } while (0)
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#define write_seqlock_irqsave(lock, flags) do { local_irq_save(flags); write_seqlock(lock); } while (0)
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#define write_seqlock_irq(lock) do { local_irq_disable(); write_seqlock(lock); } while (0)
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#define write_seqlock_bh(lock) do { local_bh_disable(); write_seqlock(lock); } while (0)
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#define write_sequnlock_irqrestore(lock, flags) do { write_sequnlock(lock); local_irq_restore(flags); } while(0)
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#define write_sequnlock_irq(lock) do { write_sequnlock(lock); local_irq_enable(); } while(0)
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#define write_sequnlock_bh(lock) do { write_sequnlock(lock); local_bh_enable(); } while(0)
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#define read_seqbegin_irqsave(lock, flags) ({ local_irq_save(flags); read_seqbegin(lock); })
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#define read_seqretry_irqrestore(lock, iv, flags) ({ int ret = read_seqretry(lock, iv); local_irq_restore(flags); ret; })
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#endif
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