mpid_dataloop.tex

刚才是说明 现在是安装程序在 LINUX环境下进行编程的MPICH安装文件

\startmanpage
\mantitle{MPID{\tt \char`\_}Dataloop}{tex}{10/7/2002}
\manname{MPID{\tt \char`\_}Dataloop}
--- Description of the structure used to hold a datatype description 
\subhead{Synopsis}
\startvb\begin{verbatim}
typedef struct dataloop_ { 
    int kind;                  /* Contains both the loop type 
                               (contig, vector, blockindexed, indexed,
                               or struct), a bit that indicates 
                               whether the datatype is a leaf type, and
                               the natural element size */
    union {
        int                        count;
        MPID_Dataloop_contig       c_t;
        MPID_Dataloop_vector       v_t;
        MPID_Dataloop_blockindexed bi_t;
        MPID_Dataloop_indexed      i_t;
        MPID_Dataloop_struct       s_t;
    } loop_params;
    MPI_Aint extent;
    int handle;                   /* Having the id here allows us to find the
                                  full datatype structure from the 
                                  Dataloop description */
} MPID_Dataloop;

\end{verbatim}
\endvb

\subhead{Fields}
\startarg{kind }{Indicates what type of datatype.  May have the value
{\tt MPID{\tt \char`\_}CONTIG}, {\tt MPID{\tt \char`\_}VECTOR}, {\tt MPID{\tt \char`\_}BLOCKINDEXED}, {\tt MPID{\tt \char`\_}INDEXED}, or
{\tt MPID{\tt \char`\_}STRUCT}.  
}
\startarg{loop{\tt \char`\_}parms }{A union containing the 5 dataloop structures, e.g., 
{\tt MPID{\tt \char`\_}Dataloop{\tt \char`\_}contig}, {\tt MPID{\tt \char`\_}Dataloop{\tt \char`\_}vector}, etc.  A sixth element in
this union, {\tt count}, allows quick access to the shared {\tt count} field in the
five dataloop structure.
}
\startarg{extent }{The extent of the datatype
}
\startarg{id     }{id for the corresponding {\tt MPI{\tt \char`\_}Datatype}.
}
\par
\subhead{Module}
Datatype-DS
\par
\endmanpage