DragonFly On-Line Manual Pages

CK_PR_FENCE_STORE_LOAD(3)                   DragonFly Library Functions Manual

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