NCBI C Toolkit Cross Reference

C/connect/ncbi_connector.c

  1 /* $Id: ncbi_connector.c,v 6.9 2007/10/17 15:25:43 kazimird Exp $
  2  * ===========================================================================
  3  *
  4  *                            PUBLIC DOMAIN NOTICE
  5  *               National Center for Biotechnology Information
  6  *
  7  *  This software/database is a "United States Government Work" under the
  8  *  terms of the United States Copyright Act.  It was written as part of
  9  *  the author's official duties as a United States Government employee and
 10  *  thus cannot be copyrighted.  This software/database is freely available
 11  *  to the public for use. The National Library of Medicine and the U.S.
 12  *  Government have not placed any restriction on its use or reproduction.
 13  *
 14  *  Although all reasonable efforts have been taken to ensure the accuracy
 15  *  and reliability of the software and data, the NLM and the U.S.
 16  *  Government do not and cannot warrant the performance or results that
 17  *  may be obtained by using this software or data. The NLM and the U.S.
 18  *  Government disclaim all warranties, express or implied, including
 19  *  warranties of performance, merchantability or fitness for any particular
 20  *  purpose.
 21  *
 22  *  Please cite the author in any work or product based on this material.
 23  *
 24  * ===========================================================================
 25  *
 26  * Author:  Anton Lavrentiev
 27  *
 28  * File Description:
 29  *   This is generally not for the public use.
 30  *   Implementation of functions of meta-connector.
 31  *
 32  */
 33 
 34 #include "ncbi_priv.h"
 35 #include <connect/ncbi_connector.h>
 36 
 37 
 38 #define NCBI_USE_ERRCODE_X  Connect_MetaConn
 39 
 40 /* Standard logging message
 41  */
 42 #define METACONN_LOG(subcode, level, descr)             \
 43   CORE_LOGF_X(subcode, level,                             \
 44             ("%s (connector \"%s\", error \"%s\")",     \
 45             descr, (*meta->get_type)(meta->c_get_type), \
 46             IO_StatusStr(status)))
 47 
 48 
 49 extern EIO_Status METACONN_Remove
 50 (SMetaConnector* meta,
 51  CONNECTOR       connector)
 52 {
 53     if (connector) {
 54         CONNECTOR x_conn;
 55         
 56         for (x_conn = meta->list;  x_conn;  x_conn = x_conn->next) {
 57             if (x_conn == connector)
 58                 break;
 59         }
 60         if (!x_conn) {
 61             EIO_Status status = eIO_Unknown;
 62             METACONN_LOG(1, eLOG_Error,
 63                          "[METACONN_Remove]  Connector is not in connection");
 64             return status;
 65         }
 66     }
 67 
 68     while (meta->list) {
 69         CONNECTOR victim = meta->list;
 70 
 71         meta->list = victim->next;
 72         victim->meta = 0;
 73         victim->next = 0;
 74         if (victim->destroy)
 75             victim->destroy(victim);
 76         if (victim == connector)
 77             break;
 78     }
 79 
 80     return eIO_Success;
 81 }
 82 
 83 
 84 extern EIO_Status METACONN_Add
 85 (SMetaConnector* meta,
 86  CONNECTOR       connector)
 87 {
 88     assert(connector && meta);
 89 
 90     if (connector->next  ||  !connector->setup) {
 91         EIO_Status status = eIO_Unknown;
 92         METACONN_LOG(2, eLOG_Error,
 93                      "[METACONN_Add]  Input connector is in use/uninitable");
 94         return status;
 95     }
 96 
 97     connector->setup(meta, connector);
 98     connector->meta = meta;
 99     connector->next = meta->list;
100     meta->list = connector;
101 
102     return eIO_Success;
103 }
104
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