Man page - ck_pr_stall(3)

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Manual


NAME

ck_pr_stall — busy-wait primitive

LIBRARY

Concurrency Kit (libck, -lck)

SYNOPSIS

#include <ck_pr.h>

void

ck_pr_stall ( void );

DESCRIPTION

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

EXAMPLE

#include <ck_pr.h>

static int ready = 0;

void
function(void)
{

/* Busy-wait until ready is non-zero. */

while (ck_pr_load_int(&ready) == 0)

ck_pr_stall();

return;

}

SEE ALSO

ck_pr_fence_load (3), ck_pr_fence_load_depends (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/ April 7, 2013 ck_pr_stall (3)