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Man Pages
CK_PR_FENCE_STORE_ATOMIC(3) FreeBSD Library Functions Manual CK_PR_FENCE_STORE_ATOMIC(3)

ck_pr_fence_store_atomic
enforce ordering of store operations to load operations

Concurrency Kit (libck, -lck)

#include <ck_pr.h>
void
ck_pr_fence_store_atomic(void);
void
ck_pr_fence_strict_store_atomic(void);

The ck_pr_fence_store_atomic() function enforces the ordering of any memory store, ck_pr_store() and atomic read-modify-write operations to atomic read-modify-write operations relative to the invocation of the function. This function always serve as an implicit compiler barrier. This functions will emit a fence for PSO and RMO targets. In order to force the emission of a fence use the ck_pr_fence_strict_store_atomic() function.


#include <ck_pr.h> 
 
static int a = 0; 
static int b = 0; 
 
void 
function(void) 
{ 
 
	ck_pr_store_int(&a, 1); 
 
	/* 
	 * Guarantee that the store to a is completed 
	 * with respect to the update of b. 
	 */ 
	ck_pr_fence_store_atomic(); 
	ck_pr_add_int(&b, 2); 
	return; 
}

This function has no return value.

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_load(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

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