ck_pflock man page on DragonFly
[printable version]
ck_pflock(3) BSD Library Functions Manual ck_pflock(3)
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.
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