GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
CK_PR_FENCE_STORE_LOAD(3) FreeBSD Library Functions Manual CK_PR_FENCE_STORE_LOAD(3)

ck_pr_fence_store_load
enforce ordering of store operations to load operations

Concurrency Kit (libck, -lck)

#include <ck_pr.h>

void
ck_pr_fence_store_load(void);

void
ck_pr_fence_strict_store_load(void);

The ck_pr_fence_store_load() function enforces the ordering of any memory store, ck_pr_store() and atomic read-modify-write operations to load operations relative to the invocation of the function. This function always serve as an implicit compiler barrier. A fence will currently always be emitted for this operation, including for TSO memory model targets.


#include <ck_pr.h>

static int a = 0;
static int b = 0;

void
function(void)
{
	unsigned int snapshot_b;

	ck_pr_store_int(&a, 1);

	/*
	 * Guarantee that the store to a is completed
	 * with respect to load from b.
	 */
	ck_pr_fence_store_load();
	snapshot_b = ck_pr_load_int(&b, 2);
	return;
}

This function has no return value.

ck_pr_stall(3), ck_pr_fence_atomic(3), ck_pr_fence_atomic_store(3), ck_pr_fence_atomic_load(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_store(3), ck_pr_fence_store_atomic(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/

May 18, 2013

Search for    or go to Top of page |  Section 3 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.