send.c

fortran并行计算包

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#include "mpiimpl.h"

/* -- Begin Profiling Symbol Block for routine MPI_Send */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Send = PMPI_Send
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Send  MPI_Send
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Send as PMPI_Send
#endif
/* -- End Profiling Symbol Block */

/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
   the MPI routines */
#ifndef MPICH_MPI_FROM_PMPI
#undef MPI_Send
#define MPI_Send PMPI_Send

#endif

#undef FUNCNAME
#define FUNCNAME MPI_Send

/*@
    MPI_Send - Performs a blocking send

Input Parameters:
+ buf - initial address of send buffer (choice) 
. count - number of elements in send buffer (nonnegative integer) 
. datatype - datatype of each send buffer element (handle) 
. dest - rank of destination (integer) 
. tag - message tag (integer) 
- comm - communicator (handle) 

Notes:
This routine may block until the message is received by the destination 
process.

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_COUNT
.N MPI_ERR_TYPE
.N MPI_ERR_TAG
.N MPI_ERR_RANK

.seealso: MPI_Isend, MPI_Bsend
@*/
int MPI_Send(void *buf, int count, MPI_Datatype datatype, int dest, int tag,
	     MPI_Comm comm)
{
    static const char FCNAME[] = "MPI_Send";
    int mpi_errno = MPI_SUCCESS;
    MPID_Comm *comm_ptr = NULL;
    MPID_Request * request_ptr = NULL;
    MPID_MPI_STATE_DECL(MPID_STATE_MPI_SEND);

    MPIR_ERRTEST_INITIALIZED_ORDIE();
    
    MPIU_THREAD_SINGLE_CS_ENTER("pt2pt");
    MPID_MPI_PT2PT_FUNC_ENTER_FRONT(MPID_STATE_MPI_SEND);
    
    /* Validate handle parameters needing to be converted */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    MPIR_ERRTEST_COMM(comm, mpi_errno);
            if (mpi_errno) goto fn_fail;
	}
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */
    
    /* Convert MPI object handles to object pointers */
    MPID_Comm_get_ptr( comm, comm_ptr );

    /* Validate parameters if error checking is enabled */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
            MPID_Comm_valid_ptr( comm_ptr, mpi_errno );
            if (mpi_errno) goto fn_fail;
	    
	    MPIR_ERRTEST_COUNT(count, mpi_errno);
	    MPIR_ERRTEST_SEND_RANK(comm_ptr, dest, mpi_errno);
	    MPIR_ERRTEST_SEND_TAG(tag, mpi_errno);
            if (mpi_errno) goto fn_fail;
	    
	    /* Validate datatype handle */
	    MPIR_ERRTEST_DATATYPE(datatype, "datatype", mpi_errno);
	    
	    /* Validate datatype object */
	    if (HANDLE_GET_KIND(datatype) != HANDLE_KIND_BUILTIN)
	    {
		MPID_Datatype *datatype_ptr = NULL;

		MPID_Datatype_get_ptr(datatype, datatype_ptr);
		MPID_Datatype_valid_ptr(datatype_ptr, mpi_errno);
		MPID_Datatype_committed_ptr(datatype_ptr, mpi_errno);
		if (mpi_errno) goto fn_fail;
	    }
	    
	    /* Validate buffer */
	    MPIR_ERRTEST_USERBUFFER(buf,count,datatype,mpi_errno);
            if (mpi_errno) goto fn_fail;
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */
    
    mpi_errno = MPID_Send(buf, count, datatype, dest, tag, comm_ptr, 
			  MPID_CONTEXT_INTRA_PT2PT, &request_ptr);
    if (mpi_errno != MPI_SUCCESS) goto fn_fail;

    if (request_ptr == NULL)
    {
	goto fn_exit;
    }

    /* If a request was returned, then we need to block until the request 
       is complete */
    if ((*(request_ptr)->cc_ptr) != 0)
    {
	MPID_Progress_state progress_state;
	    
	MPID_Progress_start(&progress_state);
	while((*(request_ptr)->cc_ptr) != 0)
	{
	    mpi_errno = MPID_Progress_wait(&progress_state);
	    if (mpi_errno != MPI_SUCCESS)
	    {
		/* --BEGIN ERROR HANDLING-- */
		MPID_Progress_end(&progress_state);
		goto fn_fail;
		/* --END ERROR HANDLING-- */
	    }
	}
	MPID_Progress_end(&progress_state);
    }

    mpi_errno = request_ptr->status.MPI_ERROR;
    MPID_Request_release(request_ptr);
    
    if (mpi_errno != MPI_SUCCESS) goto fn_fail;

    /* ... end of body of routine ... */
    
  fn_exit:
    MPID_MPI_PT2PT_FUNC_EXIT(MPID_STATE_MPI_SEND);
    MPIU_THREAD_SINGLE_CS_EXIT("pt2pt");
    return mpi_errno;

  fn_fail:
    /* --BEGIN ERROR HANDLING-- */
#   ifdef HAVE_ERROR_CHECKING
    {
	mpi_errno = MPIR_Err_create_code(
	    mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER, "**mpi_send", 
	    "**mpi_send %p %d %D %i %t %C", buf, count, datatype, dest, tag, comm);
    }
#   endif
    mpi_errno = MPIR_Err_return_comm( comm_ptr, FCNAME, mpi_errno );
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}