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NAME ck_pr_fence_atomic -- enforce partial ordering of atomic read-modify-write operations LIBRARY Concurrency Kit (libck, -lck) SYNOPSIS #include <ck_pr.h> void ck_pr_fence_atomic(void); void ck_pr_fence_strict_atomic(void); DESCRIPTION The ck_pr_fence_atomic() function enforces the ordering of any atomic read- modify-write operations relative to the invocation of the function. This function always serve as an implicit compiler barrier. On architectures im- plementing CK_MD_TSO, this operation only serves as a compiler barrier and no fences are emitted. On architectures implementing CK_MD_PSO and CK_MD_RMO, a store fence is emitted. To force the unconditional emission of a fence, use ck_pr_fence_strict_atomic(). EXAMPLE #include <ck_pr.h> static int a = 0; static int b = 0; static int c = 0; void function(void) { ck_pr_fas_int(&a, 1); /* * Guarantee that the update to a is completed * with respect to the updates of b and c. */ ck_pr_fence_atomic(); ck_pr_fas_int(&b, 2); ck_pr_fas_int(&c, 2); return; } RETURN VALUES This function has no return value. SEE ALSO ck_pr_stall(3), ck_pr_fence_atomic_store(3), ck_pr_fence_atomic_load(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_mem- ory(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(3)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | EXAMPLE | RETURN VALUES | SEE ALSO
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