/*
 * Copyright (c) 2014      The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2014-2015 NVIDIA Corporation.  All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#ifndef MCA_COLL_CUDA_EXPORT_H
#define MCA_COLL_CUDA_EXPORT_H

#include "ompi_config.h"

#include "mpi.h"

#include "opal/class/opal_object.h"
#include "ompi/mca/mca.h"

#include "ompi/constants.h"
#include "ompi/mca/coll/coll.h"
#include "ompi/mca/coll/base/base.h"
#include "ompi/communicator/communicator.h"

BEGIN_C_DECLS

/* API functions */

int mca_coll_cuda_init_query(bool enable_progress_threads,
                             bool enable_mpi_threads);
mca_coll_base_module_t
*mca_coll_cuda_comm_query(struct ompi_communicator_t *comm,
                          int *priority);

int mca_coll_cuda_module_enable(mca_coll_base_module_t *module,
                                struct ompi_communicator_t *comm);

int
mca_coll_cuda_allreduce(const void *sbuf, void *rbuf, int count,
                        struct ompi_datatype_t *dtype,
                        struct ompi_op_t *op,
                        struct ompi_communicator_t *comm,
                        mca_coll_base_module_t *module);

int mca_coll_cuda_reduce(const void *sbuf, void *rbuf, int count,
                         struct ompi_datatype_t *dtype,
                         struct ompi_op_t *op,
                         int root,
                         struct ompi_communicator_t *comm,
                         mca_coll_base_module_t *module);

int mca_coll_cuda_exscan(const void *sbuf, void *rbuf, int count,
                         struct ompi_datatype_t *dtype,
                         struct ompi_op_t *op,
                         struct ompi_communicator_t *comm,
                         mca_coll_base_module_t *module);

int mca_coll_cuda_scan(const void *sbuf, void *rbuf, int count,
                       struct ompi_datatype_t *dtype,
                       struct ompi_op_t *op,
                       struct ompi_communicator_t *comm,
                       mca_coll_base_module_t *module);

int
mca_coll_cuda_reduce_scatter_block(const void *sbuf, void *rbuf, int rcount,
                                   struct ompi_datatype_t *dtype,
                                   struct ompi_op_t *op,
                                   struct ompi_communicator_t *comm,
                                   mca_coll_base_module_t *module);

/* Types */
/* Module */

typedef struct mca_coll_cuda_module_t {
    mca_coll_base_module_t super;

    /* Pointers to all the "real" collective functions */
    mca_coll_base_comm_coll_t c_coll;
} mca_coll_cuda_module_t;

OBJ_CLASS_DECLARATION(mca_coll_cuda_module_t);

/* Component */

typedef struct mca_coll_cuda_component_t {
    mca_coll_base_component_2_0_0_t super;

    int priority; /* Priority of this component */
    int disable_cuda_coll;  /* Force disable of the CUDA collective component */
} mca_coll_cuda_component_t;

/* Globally exported variables */

OMPI_MODULE_DECLSPEC extern mca_coll_cuda_component_t mca_coll_cuda_component;

END_C_DECLS

#endif /* MCA_COLL_CUDA_EXPORT_H */