NAME¶
ck_pr_fence_atomic_load
—
enforce ordering of atomic read-modify-write
operations to load operations
LIBRARY¶
Concurrency Kit (libck, -lck)
SYNOPSIS¶
#include
<ck_pr.h>
void
ck_pr_fence_atomic_load
(
void);
void
ck_pr_fence_strict_atomic_load
(
void);
DESCRIPTION¶
The
ck_pr_fence_atomic_load
() function
enfores the ordering of any atomic read-modify-write operations relative to
any load operations following the function invocation. This function always
serve as an implicit compiler barrier. On architectures implementing
CK_MD_TSO, this operation only serves as a compiler barrier and no fences are
emitted. To force the unconditional emission of a fence, use
ck_pr_fence_strict_atomic_load
().
EXAMPLE¶
#include <ck_pr.h>
static int a = 0;
static int b = 0;
void
function(void)
{
int c;
ck_pr_fas_int(&a, 1);
/*
* Guarantee that the update to a is completed
* with respect to the load of *b.
*/
ck_pr_fence_atomic_load();
c = ck_pr_load_int(&b);
return;
}
RETURN VALUES¶
This function has no return value.
SEE ALSO¶
ck_pr_stall(3),
ck_pr_fence_atomic(3),
ck_pr_fence_atomic_store(3),
ck_pr_fence_store(3),
ck_pr_fence_load(3),
ck_pr_fence_load_atomic(3),
ck_pr_fence_load_store(3),
ck_pr_fence_load_depends(3),
ck_pr_fence_memory(3),
ck_pr_barrier(3),
ck_pr_fas(3),
ck_pr_load(3),
ck_pr_store(3),
ck_pr_faa(3),
ck_pr_inc(3),
ck_pr_dec(3),
ck_pr_neg(3),
ck_pr_not(3),
ck_pr_add(3),
ck_pr_sub(3),
ck_pr_and(3),
ck_pr_or(3),
ck_pr_xor(3),
ck_pr_cas(3),
ck_pr_btc(3),
ck_pr_bts(3),
ck_pr_btr(3)
Additional information available at
http://concurrencykit.org/