ccs_ccache_iterator.c   [plain text]

/*
 * $Header$
 *
 * Copyright 2006 Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 * require a specific license from the United States Government.
 * It is the responsibility of any person or organization contemplating
 * export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 */

#include "ccs_common.h"

/* ------------------------------------------------------------------------ */

static  cc_int32 ccs_ccache_iterator_release (ccs_ccache_iterator_t  io_ccache_iterator,
                                              ccs_cache_collection_t io_cache_collection,
                                              cci_stream_t           in_request_data,
                                              cci_stream_t           io_reply_data)
{
    cc_int32 err = ccNoError;
    
    if (!io_ccache_iterator ) { err = cci_check_error (ccErrBadParam); }
    if (!io_cache_collection) { err = cci_check_error (ccErrBadParam); }
    if (!in_request_data    ) { err = cci_check_error (ccErrBadParam); }
    if (!io_reply_data      ) { err = cci_check_error (ccErrBadParam); }
    
    if (!err) {
        err = ccs_ccache_list_iterator_release (io_ccache_iterator);
    }
    
    return cci_check_error (err);    
}

/* ------------------------------------------------------------------------ */

static  cc_int32 ccs_ccache_iterator_next (ccs_ccache_iterator_t  io_ccache_iterator,
                                           ccs_cache_collection_t io_cache_collection,
                                           cci_stream_t           in_request_data,
                                           cci_stream_t           io_reply_data)
{
    cc_int32 err = ccNoError;
    ccs_ccache_t ccache = NULL;
    
    if (!io_ccache_iterator ) { err = cci_check_error (ccErrBadParam); }
    if (!io_cache_collection) { err = cci_check_error (ccErrBadParam); }
    if (!in_request_data    ) { err = cci_check_error (ccErrBadParam); }
    if (!io_reply_data      ) { err = cci_check_error (ccErrBadParam); }
    
    if (!err) {
        err = ccs_ccache_list_iterator_next (io_ccache_iterator, &ccache);
    }
    
    if (!err) {
        err = ccs_ccache_write (ccache, io_reply_data);
    }
    
    return cci_check_error (err);    
}

/* ------------------------------------------------------------------------ */

static  cc_int32 ccs_ccache_iterator_clone (ccs_ccache_iterator_t  io_ccache_iterator,
                                            ccs_cache_collection_t io_cache_collection,
                                            cci_stream_t           in_request_data,
                                            cci_stream_t           io_reply_data)
{
    cc_int32 err = ccNoError;
    ccs_ccache_iterator_t ccache_iterator = NULL;
    
    if (!io_ccache_iterator ) { err = cci_check_error (ccErrBadParam); }
    if (!io_cache_collection) { err = cci_check_error (ccErrBadParam); }
    if (!in_request_data    ) { err = cci_check_error (ccErrBadParam); }
    if (!io_reply_data      ) { err = cci_check_error (ccErrBadParam); }
    
    if (!err) {
        err = ccs_ccache_list_iterator_clone (io_ccache_iterator,
                                              &ccache_iterator);
    }
    
    if (!err) {
        err = ccs_ccache_list_iterator_write (ccache_iterator, io_reply_data);
    }
        
    return cci_check_error (err);    
}

#pragma mark -

/* ------------------------------------------------------------------------ */

 cc_int32 ccs_ccache_iterator_handle_message (ccs_ccache_iterator_t  io_ccache_iterator,
                                              ccs_cache_collection_t io_cache_collection,
                                              enum cci_msg_id_t      in_request_name,
                                              cci_stream_t           in_request_data,
                                              cci_stream_t          *out_reply_data)
{
    cc_int32 err = ccNoError;
    cci_stream_t reply_data = NULL;
    
    if (!in_request_data) { err = cci_check_error (ccErrBadParam); }
    if (!out_reply_data ) { err = cci_check_error (ccErrBadParam); }
    
    if (!err) {
        err = cci_stream_new (&reply_data);
    }
    
    if (!err) {
        if (in_request_name == cci_ccache_iterator_release_msg_id) {
            err = ccs_ccache_iterator_release (io_ccache_iterator,
                                               io_cache_collection,
                                               in_request_data, 
                                               reply_data);
            
        } else if (in_request_name == cci_ccache_iterator_next_msg_id) {
            err = ccs_ccache_iterator_next (io_ccache_iterator,
                                            io_cache_collection,
                                            in_request_data, 
                                            reply_data);
            
        } else if (in_request_name == cci_ccache_iterator_clone_msg_id) {
            err = ccs_ccache_iterator_clone (io_ccache_iterator,
                                             io_cache_collection,
                                             in_request_data, 
                                             reply_data);
            
        } else {
            err = ccErrBadInternalMessage;
        }
    }
    
    if (!err) {
        *out_reply_data = reply_data;
        reply_data = NULL; /* take ownership */
    }
    
    cci_stream_release (reply_data);
    
    return cci_check_error (err);
}