/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *  (C) 2011 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

/* -- Begin Profiling Symbol Block for routine MPI_T_cvar_read */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_T_cvar_read = PMPI_T_cvar_read

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_T_cvar_read  MPI_T_cvar_read

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_T_cvar_read as PMPI_T_cvar_read

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_T_cvar_read(MPI_T_cvar_handle handle, void *buf) __attribute__((weak,alias("PMPI_T_cvar_read")));

#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_T_cvar_read

#define MPI_T_cvar_read PMPI_T_cvar_read

/* any non-MPI functions go here, especially non-static ones */

#undef FUNCNAME

#define FUNCNAME MPIR_T_cvar_read_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_T_cvar_read_impl(MPI_T_cvar_handle handle, void *buf)

{

    int mpi_errno = MPI_SUCCESS;

    int i, count;

    void *addr;

    MPIR_T_cvar_handle_t *hnd = handle;

    count = hnd->count;

    addr = hnd->addr;

    MPIU_Assert(addr != NULL);

    switch (hnd->datatype) {

    case MPI_INT:

        for (i = 0; i < count; i++)

            ((int *)buf)[i] = ((int *)addr)[i];

        break;

    case MPI_UNSIGNED:

        for (i = 0; i < count; i++)

            ((unsigned *)buf)[i] = ((unsigned *)addr)[i];

        break;

    case MPI_UNSIGNED_LONG:

        for (i = 0; i < count; i++)

            ((unsigned long *)buf)[i] = ((unsigned long *)addr)[i];

        break;

    case MPI_UNSIGNED_LONG_LONG:

        for (i = 0; i < count; i++)

            ((unsigned long long *)buf)[i] = ((unsigned long long *)addr)[i];

        break;

    case MPI_DOUBLE:

        for (i = 0; i < count; i++)

            ((double *)buf)[i] = ((double *)addr)[i];

        break;

    case MPI_CHAR:

        MPIU_Strncpy(buf, addr, count);

        break;

    default:

         /* FIXME the error handling code may not have been setup yet */

        MPIR_ERR_SETANDJUMP1(mpi_errno, MPI_ERR_INTERN, "**intern", "**intern %s", "unexpected parameter type");

        break;

    }

fn_exit:

    return mpi_errno;

fn_fail:

    goto fn_exit;

}

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME

#define FUNCNAME MPI_T_cvar_read

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_T_cvar_read - Read the value of a control variable

Input Parameters:

. handle - handle to the control variable to be read (handle)

Output Parameters:

. buf - initial address of storage location for variable value

.N ThreadSafe

.N Errors

.N MPI_SUCCESS

.N MPI_T_ERR_NOT_INITIALIZED

.N MPI_T_ERR_INVALID_HANDLE

@*/

int MPI_T_cvar_read(MPI_T_cvar_handle handle, void *buf)

{

    int mpi_errno = MPI_SUCCESS;

    MPID_MPI_STATE_DECL(MPID_STATE_MPI_T_CVAR_READ);

    MPIR_ERRTEST_MPIT_INITIALIZED(mpi_errno);

    MPIR_T_THREAD_CS_ENTER();

    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_T_CVAR_READ);

    /* Validate parameters */

#   ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS

        {

            MPIR_ERRTEST_CVAR_HANDLE(handle, mpi_errno);

            MPIR_ERRTEST_ARGNULL(buf, "buf", mpi_errno);

        }

        MPID_END_ERROR_CHECKS

    }

#   endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */

    mpi_errno = MPIR_T_cvar_read_impl(handle, buf);

    if (mpi_errno) MPIR_ERR_POP(mpi_errno);

    /* ... end of body of routine ... */

fn_exit:

    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_T_CVAR_READ);

    MPIR_T_THREAD_CS_EXIT();

    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_t_cvar_read", "**mpi_t_cvar_read %p %p", handle, buf);

    }

#   endif

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}