ck_pr_fence_atomic_load (3) - Linux Manuals

ck_pr_fence_atomic_load: enforce ordering of atomic read-modify-write operations to load operations

NAME

ck_pr_fence_atomic_load - enforce ordering of atomic read-modify-write operations to load operations

LIBRARY

Concurrency Kit (libck, -lck)

SYNOPSIS

In ck_pr.h Ft void Fn ck_pr_fence_atomic_load void Ft void Fn ck_pr_fence_strict_atomic_load void

DESCRIPTION

The Fn 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 Fn 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.