NAME

     ck_pflock_init, ck_pflock_write_lock, ck_pflock_write_unlock, ck_pflock_read_lock,
     ck_pflock_read_unlock, — centralized phase-fair reader-writer locks

LIBRARY

     Concurrency Kit (libck, -lck)

SYNOPSIS

     #include <ck_pflock.h>

     ck_pflock_t lock = CK_PFLOCK_INITIALIZER;

     void
     ck_pflock_init(ck_pflock_t *lock);

     void
     ck_pflock_write_lock(ck_pflock_t *lock);

     void
     ck_pflock_write_unlock(ck_pflock_t *lock);

     void
     ck_pflock_read_lock(ck_pflock_t *lock);

     void
     ck_pflock_read_unlock(ck_pflock_t *lock);

DESCRIPTION

     This is a centralized phase-fair reader-writer lock. It requires little space overhead and
     has a low latency fast path.

EXAMPLE

           #include <ck_pflock.h>

           static ck_pflock_t lock = CK_TFLOCK_INITIALIZER;

           static void
           reader(void)
           {

                   for (;;) {
                           ck_pflock_read_lock(&lock);
                           /* Read-side critical section. */
                           ck_pflock_read_unlock(&lock);
                   }

                   return;
           }

           static void
           writer(void)
           {

                   for (;;) {
                           ck_pflock_write_lock(&lock);
                           /* Write-side critical section. */
                           ck_pflock_write_unlock(&lock);
                   }

                   return;
           }

SEE ALSO

     ck_brlock(3), ck_rwlock(3), ck_tflock(3), ck_swlock(3)

     Additional information available at http://concurrencykit.org/

                                         April 22, 2014.