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

#include "mpiimpl.h"

#if !defined(MPID_REQUEST_PTR_ARRAY_SIZE)
#define MPID_REQUEST_PTR_ARRAY_SIZE 16
#endif

/* -- Begin Profiling Symbol Block for routine MPI_Startall */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Startall = PMPI_Startall
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Startall  MPI_Startall
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Startall as PMPI_Startall
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Startall(int count, MPI_Request array_of_requests[]) __attribute__((weak,alias("PMPI_Startall")));
#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_Startall
#define MPI_Startall PMPI_Startall

#endif

#undef FUNCNAME
#define FUNCNAME MPI_Startall

/*@
  MPI_Startall - Starts a collection of persistent requests 

Input Parameters:
+ count - list length (integer) 
- array_of_requests - array of requests (array of handle) 

   Notes:

   Unlike 'MPI_Waitall', 'MPI_Startall' does not provide a mechanism for
   returning multiple errors nor pinpointing the request(s) involved.
   Furthermore, the behavior of 'MPI_Startall' after an error occurs is not
   defined by the MPI standard.  If well-defined error reporting and behavior
   are required, multiple calls to 'MPI_Start' should be used instead.

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_REQUEST
@*/
int MPI_Startall(int count, MPI_Request array_of_requests[])
{
    static const char FCNAME[] = "MPI_Startall";
    MPID_Request * request_ptr_array[MPID_REQUEST_PTR_ARRAY_SIZE];
    MPID_Request ** request_ptrs = request_ptr_array;
    int i;
    int mpi_errno = MPI_SUCCESS;
    MPIU_CHKLMEM_DECL(1);
    MPID_MPI_STATE_DECL(MPID_STATE_MPI_STARTALL);

    MPIR_ERRTEST_INITIALIZED_ORDIE();
    
    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
    MPID_MPI_PT2PT_FUNC_ENTER(MPID_STATE_MPI_STARTALL);

    /* Validate handle parameters needing to be converted */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    MPIR_ERRTEST_COUNT(count, mpi_errno);
	    MPIR_ERRTEST_ARGNULL(array_of_requests,"array_of_requests", mpi_errno);
	    
	    for (i = 0; i < count; i++) {
		MPIR_ERRTEST_REQUEST(array_of_requests[i], mpi_errno);
	    }
	}
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */
    
    /* Convert MPI request handles to a request object pointers */
    if (count > MPID_REQUEST_PTR_ARRAY_SIZE)
    {
	MPIU_CHKLMEM_MALLOC_ORJUMP(request_ptrs, MPID_Request **, count * sizeof(MPID_Request *), mpi_errno, "request pointers");
    }

    for (i = 0; i < count; i++)
    {
	MPID_Request_get_ptr(array_of_requests[i], request_ptrs[i]);
    }
    
    /* Validate object pointers if error checking is enabled */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS;
        {
	    for (i = 0; i < count; i++) {
		MPID_Request_valid_ptr( request_ptrs[i], mpi_errno );
                if (mpi_errno) goto fn_fail;
	    }
	    for (i = 0; i < count; i++) {
		MPIR_ERRTEST_PERSISTENT(request_ptrs[i], mpi_errno);
		MPIR_ERRTEST_PERSISTENT_ACTIVE(request_ptrs[i], mpi_errno);
	    }
        }
        MPID_END_ERROR_CHECKS;
    }
#   endif /* HAVE_ERROR_CHECKING */
    
    /* ... body of routine ... */
    
    mpi_errno = MPID_Startall(count, request_ptrs);
    if (mpi_errno != MPI_SUCCESS) goto fn_fail;

    /* ... end of body of routine ... */
    
  fn_exit:
    if (count > MPID_REQUEST_PTR_ARRAY_SIZE)
    {
	MPIU_CHKLMEM_FREEALL();
    }

    MPID_MPI_PT2PT_FUNC_EXIT(MPID_STATE_MPI_STARTALL);
    MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
    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_startall",
	    "**mpi_startall %d %p", count, array_of_requests);
    }
#   endif
    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}