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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2014-2015 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "osc_rdma.h"
/**
* @brief attach a region to a window
*
* @param[in] win mpi window
* @param[in] base base pointer of region
* @param[in] len region size
*
* @returns OMPI_SUCCESS on success
* @returns OMPI_ERR_RMA_FLAVOR if the window is not a dynamic window
* @returns OMPI_ERR_RMA_ATTACH if the region could not be attached
*
* This function attaches a region to the local window. After this call
* completes the region will be available for RMA access by all peers in
* the window.
*/
int ompi_osc_rdma_attach (struct ompi_win_t *win, void *base, size_t len);
/**
* @brief detach a region from a window
*
* @param[in] win mpi window
* @param[in] base base pointer of region specified to ompi_osc_rdma_attach()
*
* @returns OMPI_SUCCESS on success
* @returns OMPI_ERR_RMA_FLAVOR if the window is not a dynamic window
* @returns OMPI_ERROR if the region is not attached
*
* This function requires that a region with the same base has been attached
* using the ompi_osc_rdma_attach() function.
*/
int ompi_osc_rdma_detach (struct ompi_win_t *win, const void *base);
/**
* @brief find dynamic region associated with a peer, base, and len
*
* @param[in] module osc rdma module
* @param[in] peer peer object for remote peer
* @param[in] base base pointer for region
* @param[in] len length of region
* @param[out] region region structure for the region
*
* @returns OMPI_SUCCESS on success
* @returns OMPI_ERR_OUT_OF_RESOURCE on resource failure
* @returns OMPI_ERR_RMA_RANGE if no region matches
*/
int ompi_osc_rdma_find_dynamic_region (ompi_osc_rdma_module_t *module, ompi_osc_rdma_peer_t *peer, uint64_t base, size_t len,
ompi_osc_rdma_region_t **region);
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