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Viewing changes to ports/winnt/libisc/once.c

  • Committer: Bazaar Package Importer
  • Author(s): Matt Zimmerman
  • Date: 2004-10-11 16:10:27 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20041011161027-icyjbji8ujym633o
Tags: 1:4.2.0a-10ubuntu2
Use ntp.ubuntulinux.org instead of pool.ntp.org

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ports/winnt/libisc/once.c
 
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/*
 
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 * Copyright (C) 1999-2001  Internet Software Consortium.
 
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 *
 
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 * Permission to use, copy, modify, and distribute this software for any
 
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 * purpose with or without fee is hereby granted, provided that the above
 
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 * copyright notice and this permission notice appear in all copies.
 
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 *
 
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 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
 
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 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 
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 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
 
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 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 
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 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 
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 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 
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 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
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 */
 
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/* $Id: once.c,v 1.9 2001/07/09 21:06:16 gson Exp $ */
 
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/* Principal Authors: DCL */
 
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#include <config.h>
 
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#include <windows.h>
 
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#include <isc/once.h>
 
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#include <isc/assertions.h>
 
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#include <isc/util.h>
 
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isc_result_t
 
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isc_once_do(isc_once_t *controller, void(*function)(void)) {
 
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        REQUIRE(controller != NULL && function != NULL);
 
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        if (controller->status == ISC_ONCE_INIT_NEEDED) {
 
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                if (InterlockedDecrement((long *)&controller->counter) == 0) {
 
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                        if (controller->status == ISC_ONCE_INIT_NEEDED) {
 
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                                function();
 
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                                controller->status = ISC_ONCE_INIT_DONE;
 
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                        }
 
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                } else {
 
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                        while (controller->status == ISC_ONCE_INIT_NEEDED) {
 
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                                /*
 
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                                 * Spin wait.
 
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                                 */
 
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                        }
 
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                }
 
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        }
 
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        return (ISC_R_SUCCESS);
 
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}