FreeBSD Device Drivers

Reader/Writer Lock Management Routines

The FreeBSD kernel provides the following 11 functions for working with rw locks:

#include <sys/param.h>
#include <sys/lock.h>
#include <sys/rwlock.h>

void
rw_init(struct rwlock *rw, const char *name);

void
rw_init_flags(struct rwlock *rw, const char *name, int opts); void rw_rlock(struct rwlock *rw); void rw_wlock(struct rwlock *rw); int rw_try_rlock(struct rwlock *rw); int rw_try_wlock(struct rwlock *rw); void ...