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CK_PR_FENCE_STORE_LOAD(3) Library Functions Manual CK_PR_FENCE_STORE_LOAD(3)

NAME

ck_pr_fence_store_load —
enforce ordering of store operations to load operations

LIBRARY

Concurrency Kit (libck, -lck)

SYNOPSIS

#include <ck_pr.h>

void
ck_pr_fence_store_load(void);

void
ck_pr_fence_strict_store_load(void);

DESCRIPTION

The ck_pr_fence_store_load() function enfores the ordering of any memory store, ck_pr_store() and atomic read-modify-write operations to load operations relative to the invocation of the function. This function always serve as an implicit compiler barrier. A fence will currently always be emitted for this operation, including for TSO memory model targets.

EXAMPLE


#include <ck_pr.h>

static int a = 0;
static int b = 0;

void
function(void)
{
	unsigned int snapshot_b;

	ck_pr_store_int(&a, 1);

	/*
	 * Guarantee that the store to a is completed
	 * with respect to load from b.
	 */
	ck_pr_fence_store_load();
	snapshot_b = ck_pr_load_int(&b, 2);
	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_atomic_load(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_store(3), ck_pr_fence_store_atomic(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 18, 2013