ck_pr_stall man page

ck_pr_stall ā€” 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/

Referenced By

ck_pr(3), ck_pr_fence_acquire(3), ck_pr_fence_atomic(3), ck_pr_fence_atomic_load(3), ck_pr_fence_atomic_store(3), ck_pr_fence_load(3), ck_pr_fence_load_atomic(3), ck_pr_fence_load_depends(3), ck_pr_fence_load_store(3), ck_pr_fence_memory(3), ck_pr_fence_release(3), ck_pr_fence_store(3), ck_pr_fence_store_atomic(3), ck_pr_fence_store_load(3).

April 7, 2013