<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="DOCTEXT"> <TITLE>MPI_Get_elements</TITLE> </HEAD> <BODY BGCOLOR="FFFFFF"> <A NAME="MPI_Get_elements"><H1>MPI_Get_elements</H1></A> Returns the number of basic elements in a datatype <H2>Synopsis</H2> <PRE> int MPI_Get_elements(MPI_Status *status, MPI_Datatype datatype, int *elements) </PRE> <H2>Input Parameters</H2> <DL> <DT><B>status </B><DD>return status of receive operation (Status) <DT><B>datatype </B><DD>datatype used by receive operation (handle) </DL> <P> <H2>Output Parameter</H2> <DL><DT><B>count </B> <DD> number of received basic elements (integer) </DL> <P> <H2>Notes</H2> <P> If the size of the datatype is zero and the amount of data returned as determined by <TT>status</TT> is also zero, this routine will return a count of zero. This is consistent with a clarification made by the MPI Forum. <P> <H2>Notes for Fortran</H2> All MPI routines in Fortran (except for <TT>MPI_WTIME</TT> and <TT>MPI_WTICK</TT>) have an additional argument <TT>ierr</TT> at the end of the argument list. <TT>ierr </TT>is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked with the <TT>call</TT> statement. <P> All MPI objects (e.g., <TT>MPI_Datatype</TT>, <TT>MPI_Comm</TT>) are of type <TT>INTEGER </TT>in Fortran. <P> <H2>Errors</H2> <P> All MPI routines (except <TT>MPI_Wtime</TT> and <TT>MPI_Wtick</TT>) return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with <TT>MPI_Comm_set_errhandler</TT> (for communicators), <TT>MPI_File_set_errhandler</TT> (for files), and <TT>MPI_Win_set_errhandler</TT> (for RMA windows). The MPI-1 routine <TT>MPI_Errhandler_set</TT> may be used but its use is deprecated. The predefined error handler <TT>MPI_ERRORS_RETURN</TT> may be used to cause error values to be returned. Note that MPI does <EM>not</EM> guarentee that an MPI program can continue past an error; however, MPI implementations will attempt to continue whenever possible. <P> <DL><DT><B>MPI_SUCCESS </B> <DD> No error; MPI routine completed successfully. </DL> <P><B>Location:</B>get_elements.c<P> </BODY></HTML>