Man page - ck_pr_fence_atomic_load(3)

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Manual

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 enforces 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/ May 16, 2013 CK_PR_FENCE_ATOMIC_LOAD (3)