rrwlock Struct Reference

A reader-writer lock implementation that allows re-entrant reads, but still gives writers priority on "new" reads. More...

#include <rrwlock.h>

Collaboration diagram for rrwlock:

Data Fields
kmutex_t	rr_lock
kcondvar_t	rr_cv
kthread_t *	rr_writer
refcount_t	rr_anon_rcount
refcount_t	rr_linked_rcount
boolean_t	rr_writer_wanted

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Detailed Description

A reader-writer lock implementation that allows re-entrant reads, but still gives writers priority on "new" reads.

See rrwlock.c for more details about the implementation.

Fields of the rrwlock_t structure:

• rr_lock: protects modification and reading of rrwlock_t fields
• rr_cv: cv for waking up readers or waiting writers
• rr_writer: thread id of the current writer
• rr_anon_rount: number of active anonymous readers
• rr_linked_rcount: total number of non-anonymous active readers
• rr_writer_wanted: a writer wants the lock

Definition at line 52 of file rrwlock.h.

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Field Documentation

refcount_t rrwlock::rr_anon_rcount

Definition at line 56 of file rrwlock.h.

kcondvar_t rrwlock::rr_cv

Definition at line 54 of file rrwlock.h.

refcount_t rrwlock::rr_linked_rcount

Definition at line 57 of file rrwlock.h.

kmutex_t rrwlock::rr_lock

Definition at line 53 of file rrwlock.h.

kthread_t* rrwlock::rr_writer

Definition at line 55 of file rrwlock.h.

boolean_t rrwlock::rr_writer_wanted

Definition at line 58 of file rrwlock.h.

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The documentation for this struct was generated from the following file:

• sys/rrwlock.h