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

NAME

4     ck_pr_stall — busy-wait primitive
5

LIBRARY

7     Concurrency Kit (libck, -lck)
8

SYNOPSIS

10     #include <ck_pr.h>
11
12     void
13     ck_pr_stall(void);
14

DESCRIPTION

16     The ck_pr_stall(3) function should be used inside retry paths of busy-
17     wait loops.  It not only serves as a compiler barrier, but on some archi‐
18     tectures it emits cycle-saving instructions.
19

EXAMPLE

21           #include <ck_pr.h>
22
23           static int ready = 0;
24
25           void
26           function(void)
27           {
28
29                   /* Busy-wait until ready is non-zero. */
30                   while (ck_pr_load_int(&ready) == 0)
31                           ck_pr_stall();
32
33                   return;
34           }
35

SEE ALSO

37     ck_pr_fence_load(3), ck_pr_fence_load_depends(3), ck_pr_fence_store(3),
38     ck_pr_fence_memory(3), ck_pr_barrier(3), ck_pr_fas(3), ck_pr_load(3),
39     ck_pr_store(3), ck_pr_faa(3), ck_pr_inc(3), ck_pr_dec(3), ck_pr_neg(3),
40     ck_pr_not(3), ck_pr_add(3), ck_pr_sub(3), ck_pr_and(3), ck_pr_or(3),
41     ck_pr_xor(3), ck_pr_cas(3), ck_pr_btc(3), ck_pr_bts(3), ck_pr_btr(3)
42
43     Additional information available at http://concurrencykit.org/
44
45                                 April 7, 2013
Impressum