1ck_pr_fence_store(3)     BSD Library Functions Manual     ck_pr_fence_store(3)
2

NAME

4     ck_pr_fence_store — enforce partial ordering of store operations
5

LIBRARY

7     Concurrency Kit (libck, -lck)
8

SYNOPSIS

10     #include <ck_pr.h>
11
12     void
13     ck_pr_fence_store(void);
14
15     void
16     ck_pr_fence_strict_store(void);
17

DESCRIPTION

19     The ck_pr_fence_store() function enforces the ordering of any memory
20     store, ck_pr_store() and atomic read-modify-write operations relative to
21     the invocation of the function. This function always serve as an implicit
22     compiler barrier. On architectures implementing CK_MD_TSO, this operation
23     only serves as a compiler barrier and no fences are emitted. On architec‐
24     tures implementing CK_MD_PSO and CK_MD_RMO, a store fence is emitted. To
25     force the unconditional emission of a store fence, use
26     ck_pr_fence_strict_store().
27

EXAMPLE

29           #include <ck_pr.h>
30
31           static int a = 0;
32           static int b = 0;
33           static int c = 0;
34
35           void
36           function(void)
37           {
38
39                   ck_pr_store_int(&a, 1);
40
41                   /*
42                    * Guarantee that the store to a is completed
43                    * with respect to the stores of b and c.
44                    */
45                   ck_pr_fence_store();
46                   ck_pr_store_int(&b, 2);
47                   ck_pr_store_int(&c, 2);
48
49                   return;
50           }
51

RETURN VALUES

53     This function has no return value.
54

SEE ALSO

56     ck_pr_stall(3), ck_pr_fence_atomic(3), ck_pr_fence_atomic_store(3),
57     ck_pr_fence_atomic_load(3), ck_pr_fence_load(3),
58     ck_pr_fence_load_atomic(3), ck_pr_fence_load_store(3),
59     ck_pr_fence_load_depends(3), ck_pr_fence_memory(3), ck_pr_barrier(3),
60     ck_pr_fas(3), ck_pr_load(3), ck_pr_store(3), ck_pr_faa(3), ck_pr_inc(3),
61     ck_pr_dec(3), ck_pr_neg(3), ck_pr_not(3), ck_pr_add(3), ck_pr_sub(3),
62     ck_pr_and(3), ck_pr_or(3), ck_pr_xor(3), ck_pr_cas(3), ck_pr_btc(3),
63     ck_pr_bts(3), ck_pr_btr(3)
64
65     Additional information available at http://concurrencykit.org/
66
67                                 April 7, 2013
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