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


Manual Reference Pages  -  CK_EPOCH_BARRIER (3)

NAME

ck_epoch_barrier - block until a grace period and all callbacks have been dispatched

CONTENTS

Library
Synopsis
Description
Example
Return Values
Errors
See Also

LIBRARY

Concurrency Kit (libck, -lck)

SYNOPSIS


.In ck_epoch.h void ck_epoch_barrier ck_epoch_record_t *record

DESCRIPTION

The ck_epoch_barrier 3 function will block the caller until a grace period has been detected, according to the semantics of epoch reclamation. Any objects requiring safe memory reclamation which are logically deleted are safe for physical deletion following a call to ck_epoch_barrier 3. This function will also dispatch all callbacks associated with epoch that were previously scheduled via ck_epoch_call 3.

EXAMPLE

#include <ck_epoch.h> #include <ck_stack.h> #include <stdlib.h>

/* * epoch was previously initialized with ck_epoch_init. * stack was previously initialized with ck_stack_init. */ ck_epoch_t *epoch; ck_stack_t *stack;

void function(void) {         ck_epoch_record_t *record;         ck_stack_entry_t *s;

        record = malloc(sizeof *record);         ck_epoch_register(&epoch, record);

        /*          * We are using an epoch section here to guarantee no          * nodes in the stack are deleted while we are dereferencing          * them. This is needed here because there are multiple writers.          * If there was only one thread popping from the this stack,          * then there is no need to ck_epoch_begin/ck_epoch_end.          */         ck_epoch_begin(record);

        /* Logically delete an object. */         s = ck_stack_pop_upmc(stack);

        ck_epoch_end(record);

        /*          * Wait until no threads could possibly have a reference to the          * object we just popped (assume all threads are simply executing          * ck_stack_pop_upmc).          */         ck_epoch_barrier(record);

        /* It is now safe to physically delete the object. */         free(s);         return; }

RETURN VALUES

This function has no return value.

ERRORS

Behavior is undefined if the object pointed to by epoch is not a valid epoch object. The object pointed to by record must have been previously registered via ck_epoch_register 3.

SEE ALSO

ck_epoch_init(3), ck_epoch_register(3), ck_epoch_unregister(3), ck_epoch_recycle(3), ck_epoch_poll(3), ck_epoch_synchronize(3), ck_epoch_reclaim(3), ck_epoch_call(3), ck_epoch_begin(3), ck_epoch_end(3)

Additional information available at http://concurrencykit.org/

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 manServer 1.07.