NAME

       globus_gass_transfer_data - Sending and Receiving Data

        - Sending and Receiving Data.

SYNOPSIS

   Typedefs
       typedef void(* globus_gass_transfer_bytes_callback_t) (void *arg,
           globus_gass_transfer_request_t request, globus_byte_t *bytes, globus_size_t length,
           globus_bool_t last_data)

   Functions
       int globus_gass_transfer_send_bytes (globus_gass_transfer_request_t request, globus_byte_t
           *bytes, globus_size_t send_length, globus_bool_t last_data,
           globus_gass_transfer_bytes_callback_t callback, void *user_arg)
       int globus_gass_transfer_receive_bytes (globus_gass_transfer_request_t request,
           globus_byte_t *bytes, globus_size_t max_length, globus_size_t wait_for_length,
           globus_gass_transfer_bytes_callback_t callback, void *user_arg)

Detailed Description

       Sending and Receiving Data.

Typedef Documentation

   typedef void(* globus_gass_transfer_bytes_callback_t) (void *arg,
       globus_gass_transfer_request_t request, globus_byte_t *bytes, globus_size_t length,
       globus_bool_t last_data)
       Byte send or receive callback function.

       Parameters
           arg The user_arg passed to the function which registered this callback. The user may
           use this value for any purpose.
           request The request handle associated with this byte array.
           bytes The byte array which was sent or received.
           length The length of data which was sent or received.
           last_data Boolean flag whether this is the final byte array for this request.

       See also
           globus_gass_transfer_send_bytes(), globus_gass_transfer_receive_bytes()

Function Documentation

   int globus_gass_transfer_receive_bytes (globus_gass_transfer_request_t request, globus_byte_t
       * bytes, globus_size_t max_length, globus_size_t wait_for_length,
       globus_gass_transfer_bytes_callback_t callback, void * user_arg)
       Receive a byte array associated with a request handle.

       This function receives a block of data from a server or client as part of the processing
       for a request. Multiple data blocks may be registered with the GASS transfer library at
       once.

       When processing a server request, this function may only be used in conjunction with 'put'
       or 'append' requests. The user must call globus_gass_transfer_authorize() before calling
       this function.

       When processing a client request, this function may only be used in conjunction with 'get'
       requests. This function may not be called before either the callback function has been
       invoked, or the blocking globus_gass_tranfser_put() or globus_gass_transfer_append()
       function has returned.

       Parameters
           request The request handle with which this block of bytes is associated.
           bytes A user-supplied buffer containing the data associated with the request.
           max_length The length of the bytes array.
           wait_for_length The minimum amount of data to wait for before invoking the callback
           function. A partial byte array of at least this amount will be returned in the
           callback, unless end-of-file is reached before this amount.
           callback Function to call once the bytes array has been received.
           user_arg Argument to be passed to the callback function.

       Return values
           GLOBUS_SUCCESS The bytes array was successfully registered with the GASS transfer
           library. The callback function will be invoked once it has been received.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER The bytes or callback parameter was NULL.
           GLOBUS_GASS_TRANSFER_ERROR_INVALID_USER The request was invalid, or it is not one on
           which bytes can be sent.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_INITIALIZED The callback to a non-blocking file request
           has not been invoked yet, a blocking file request has not returned, or the request has
           not yet been authorized.
           GLOBUS_GASS_TRANSFER_ERROR_REQUEST_FAILED The request has failed by either the client,
           server, or protocol module implementation.
           GLOBUS_GASS_TRANSFER_ERROR_DONE The request has already been completed.

   int globus_gass_transfer_send_bytes (globus_gass_transfer_request_t request, globus_byte_t *
       bytes, globus_size_t send_length, globus_bool_t last_data,
       globus_gass_transfer_bytes_callback_t callback, void * user_arg)
       Send a byte array associated with a request handle.

       This function sends a block of data to a server or client as part of the processing for a
       request. Multiple data blocks may be registered with the GASS transfer library at once.

       When processing a server request, this function may only be used in conjunction with 'get'
       requests. The user must call globus_gass_transfer_authorize() before calling this
       function.

       When processing a client request, this function may only be used in conjunction with 'put'
       or 'append' requests. This function may not be called before either the callback function
       has been invoked, or the blocking globus_gass_tranfser_put() or
       globus_gass_transfer_append() function has returned.

       Parameters
           request The request handle with which this block of bytes is associated.
           bytes A user-supplied buffer containing the data associated with the request.
           send_length The length of the bytes array.
           last_data A flag to indicate whether this is the final block of data for the request.
           If this is true, then the callback function will be delayed until the server
           acknowledges that the file has been completely received.
           callback Function to call once the bytes array has been sent.
           user_arg Argument to be passed to the callback function.

       Return values
           GLOBUS_SUCCESS The bytes array was successfully registered with the GASS transfer
           library. The callback function will be invoked once it has been sent.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER The bytes or callback parameter was NULL.
           GLOBUS_GASS_TRANSFER_ERROR_INVALID_USER The request was invalid, or it is not one on
           which bytes can be sent.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_INITIALIZED The callback to a non-blocking file request
           has not been invoked yet, a blocking file request has not returned, or the request has
           not yet been authorized.
           GLOBUS_GASS_TRANSFER_ERROR_REQUEST_FAILED The request has failed by either the client,
           server, or protocol module implementation.
           GLOBUS_GASS_TRANSFER_ERROR_DONE The request has already been completed.

Author

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