tt_message_context_xval(3)

NAME
     tt_message_context_xval - retrieve and deserialize the data from a
     message's context

SYNOPSIS
     #include <Tt/tt_c.h>
     Tt_status tt_message_context_xval(Tt_message m,
                                       const char *slotname,
                                       xdrproc_t xdr_proc,
                                       void **value);

DESCRIPTION
     The tt_message_context_xval() function retrieves and deserializes the
     data from a message's context.

     The m argument is the opaque handle for the message involved in this
     operation.  The slotname argument describes the context of this message.
     The xdr_proc argument points to the XDR procedure to be used to
     deserialize the data in the nth argument into newly allocated storage,
     the address of which will be stored in the pointer whose address is
     value.

     The value argument is the data to be deserialized.

RETURN VALUE
     Upon successful completion, the tt_message_context_xval() function
     returns the status of the operation as one of the following Tt_status
     values:

        TT_OK   The operation completed successfully.

        TT_ERR_MODE
                The specified Tt_mode is invalid.

        TT_ERR_NOMP
                The ttsession(1) process is not running and the ToolTalk
                service cannot restart it.

        TT_ERR_POINTER
                The pointer passed does not point to an object of the correct
                type for this operation.

        TT_ERR_NUM
                The integer value passed was invalid (out of range).

        TT_ERR_XDR
                The XDR procedure failed on the given data, or evaluated to a
                zero-length expression.
APPLICATION USAGE
     The allocation calls are made by the XDR procedure; therefore, any
     storage allocated is not allocated from the ToolTalk allocation stack.
     The application should use the xdr_free(3) call to free this storage.

SEE ALSO
     Tttt_c(5); the .