List.cpp

/*--------------------------------------------------------------- 
 * Copyright (c) 1999,2000,2001,2002,2003                              
 * The Board of Trustees of the University of Illinois            
 * All Rights Reserved.                                           
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 * persons to whom the Software is furnished to do
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 * the following disclaimers. 
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 * Redistributions in binary form must reproduce the above 
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 * disclaimers in the documentation and/or other materials 
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 * nor the names of its contributors may be used to endorse 
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 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
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 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
 * ________________________________________________________________
 * National Laboratory for Applied Network Research 
 * National Center for Supercomputing Applications 
 * University of Illinois at Urbana-Champaign 
 * http://www.ncsa.uiuc.edu
 * ________________________________________________________________ 
 *
 * List.cpp
 * by Kevin Gibbs <kgibbs@ncsa.uiuc.edu> 
 * ------------------------------------------------------------------- 
 */

#include "List.h"
#include "Mutex.h"
#include "SocketAddr.h"

/*
 * Global List and Mutex variables
 */
Iperf_ListEntry *clients = NULL;
Mutex clients_mutex; 

/*
 * Add Entry add to the List
 */
void Iperf_pushback ( Iperf_ListEntry *add, Iperf_ListEntry **root ) {
    add->next = *root;
    *root = add;
}

/*
 * Delete Entry del from the List
 */
void Iperf_delete ( iperf_sockaddr *del, Iperf_ListEntry **root ) {
    Iperf_ListEntry *temp = Iperf_present( del, *root );
    if ( temp != NULL ) {
        if ( temp == *root ) {
            *root = (*root)->next;
        } else {
            Iperf_ListEntry *itr = *root;
            while ( itr->next != NULL ) {
                if ( itr->next == temp ) {
                    itr->next = itr->next->next;
                    break;
                }
                itr = itr->next;
            }
        }
        delete temp;
    }
}

/*
 * Destroy the List (cleanup function)
 */
void Iperf_destroy ( Iperf_ListEntry **root ) {
    Iperf_ListEntry *itr1 = *root, *itr2;
    while ( itr1 != NULL ) {
        itr2 = itr1->next;
        delete itr1;
        itr1 = itr2;
    }
    *root = NULL;
}

/*
 * Check if the exact Entry find is present
 */
Iperf_ListEntry* Iperf_present ( iperf_sockaddr *find, Iperf_ListEntry *root ) {
    Iperf_ListEntry *itr = root;
    while ( itr != NULL ) {
        if ( SockAddr_are_Equal( (sockaddr*)itr, (sockaddr*)find ) ) {
            return itr;
        }
        itr = itr->next;
    }
    return NULL;
}

/*
 * Check if a Entry find is in the List or if any
 * Entry exists that has the same host as the 
 * Entry find
 */
Iperf_ListEntry* Iperf_hostpresent ( iperf_sockaddr *find, Iperf_ListEntry *root ) {
    Iperf_ListEntry *itr = root;
    while ( itr != NULL ) {
        if ( SockAddr_Hostare_Equal( (sockaddr*)itr, (sockaddr*)find ) ) {
            return itr;
        }
        itr = itr->next;
    }
    return NULL;
}