MPI_Wait
Waits for an MPI send or receive to complete 
Synopsis
#include "mpi.h"
int MPI_Wait ( request, status )
MPI_Request  *request;
MPI_Status   *status;
Input Parameter
- request  
-  request (handle) 
Output Parameter
- status  
-  status object (Status) 
Note on status for send operations
For send operations, the only use of status is for MPI_Test_cancelled 
orin the case that there is an error, in which case the MPI_ERROR field 
ofstatus will be set.
Notes for Fortran
All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK) 
havean additional argument ierr at the end of the argument list.  
ierris an integer and has the same meaning as the return value of the 
routinein C.  In Fortran, MPI routines are subroutines, and are invoked with 
thecall statement.
All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type 
INTEGERin Fortran.
Errors
All MPI routines (except MPI_Wtime and MPI_Wtick) return an error value;
C routines as the value of the function and Fortran routines in the 
lastargument.  Before the value is returned, the current MPI error handler 
iscalled.  By default, this error handler aborts the MPI job.  The error 
handlermay be changed with MPI_Errhandler_set; the predefined error 
handlerMPI_ERRORS_RETURN may be used to cause error values to be returned.
Note that MPI does not guarentee that an MPI program can continue 
pastan error.
- MPI_SUCCESS  
-  No error; MPI routine completed successfully.
- MPI_ERR_REQUEST  
-  Invalid MPI_Request.  Either null or, in the case of a
MPI_Start or MPI_Startall, not a persistent request.
- MPI_ERR_ARG  
-  Invalid argument.  Some argument is invalid and is not
identified by a specific error class (e.g., MPI_ERR_RANK).
Location:wait.c