CK_PR_FENCE_LOAD_STORE(3)  Library Functions Manual  CK_PR_FENCE_LOAD_STORE(3)

NAME
     ck_pr_fence_load_store - enforce ordering of load operations to store
     operations

LIBRARY
     Concurrency Kit (libck, -lck)

SYNOPSIS
     #include <ck_pr.h>

     void
     ck_pr_fence_load_store(void);

     void
     ck_pr_fence_strict_load_store(void);

DESCRIPTION
     This function enforces the ordering of any memory load and ck_pr_load(3)
     operations with respect to store operations relative to the invocation of
     the function. Any store operations that were committed on remote
     processors and received by the calling processor before the invocation of
     ck_pr_fence_load_store() is also be made visible only after a call to the
     ck_pr_fence_load family of functions.  This function always serves as an
     implicit compiler barrier.  On architectures with CK_MD_TSO or CK_MD_PSO
     specified (total store ordering and partial store ordering respectively),
     this operation only serves as a compiler barrier and no fence
     instructions will be emitted. To force the unconditional emission of a
     load fence, use ck_pr_fence_strict_load_store().  Architectures
     implementing CK_MD_RMO always emit a fence.

EXAMPLE

           #include <ck_pr.h>

           static unsigned int a;
           static unsigned int b;

           void
           function(void)
           {
                   unsigned int snapshot_a;

                   snapshot_a = ck_pr_load_uint(&a);

                   /*
                    * Guarantee that the load from "a" completes
                    * before the store to "b".
                    */
                   ck_pr_fence_load_store();
                   ck_pr_store_uint(&b, 1);

                   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_depends(3),
     ck_pr_fence_load_atomic(3), ck_pr_fence_store(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