/*===========================================================================
*
*                            PUBLIC DOMAIN NOTICE
*               National Center for Biotechnology Information
*
*  This software/database is a "United States Government Work" under the
*  terms of the United States Copyright Act.  It was written as part of
*  the author's official duties as a United States Government employee and
*  thus cannot be copyrighted.  This software/database is freely available
*  to the public for use. The National Library of Medicine and the U.S.
*  Government have not placed any restriction on its use or reproduction.
*
*  Although all reasonable efforts have been taken to ensure the accuracy
*  and reliability of the software and data, the NLM and the U.S.
*  Government do not and cannot warrant the performance or results that
*  may be obtained by using this software or data. The NLM and the U.S.
*  Government disclaim all warranties, express or implied, including
*  warranties of performance, merchantability or fitness for any particular
*  purpose.
*
*  Please cite the author in any work or product based on this material.
*
* ===========================================================================
*
*/

#include <klib/rc.h>
#include <atomic32.h>

#include "sysmgr.h"

#include <WINDOWS.H>

static atomic32_t mgr_count;

rc_t KNSManagerInit ( void )
{
    if ( atomic32_test_and_inc ( & mgr_count ) )
    {
        WSADATA wsaData;
        if ( WSAStartup ( MAKEWORD ( 2, 2 ), & wsaData ) != 0 )
        {
            int lerrno = WSAGetLastError ();
            switch ( lerrno )
            {
            case WSASYSNOTREADY:
            case WSAVERNOTSUPPORTED:
            case WSAEINPROGRESS:
            case WSAEPROCLIM:
            case WSAEFAULT:
            default:
                atomic32_dec ( & mgr_count );
                return RC ( rcNS, rcMgr, rcInitializing, rcLibrary, rcNotAvailable );
            }
        }
    }

    return 0;
} 

void KNSManagerCleanup ( void )
{
    if ( atomic32_dec_and_test ( & mgr_count ) )
        WSACleanup ();
}
