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in the base). Correctly deal with persistent requests (they must be always freed when they are stored in the request array associated with the communicator). Always use MPI_STATUS_IGNORE for single request waiting functions.
131 строка
4.7 KiB
C
131 строка
4.7 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*
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*/
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/** @file
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* MCA coll base framework public interface functions.
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*
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* These functions are normally invoked by the back-ends of:
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*
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* - The back-ends of MPI_Init() and MPI_Finalize()
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* - Communicator constructors (e.g., MPI_Comm_split()) and
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* destructors (e.g., MPI_Comm_free())
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* - The laminfo command
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*/
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#ifndef MCA_COLL_BASE_H
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#define MCA_COLL_BASE_H
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#include "ompi_config.h"
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#include "mpi.h"
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#include "opal/class/opal_list.h"
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#include "opal/mca/base/base.h"
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/*
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* Global functions for MCA overall collective open and close
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*/
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BEGIN_C_DECLS
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/**
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* Create list of available coll components.
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*
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* @param allow_multi_user_threads Will be set to true if any of the
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* available components will allow multiple user threads
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* @param have_hidden_threads Will be set to true if any of the
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* available components have hidden threads.
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*
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* @retval OMPI_SUCCESS If one or more coll components are available.
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* @retval OMPI_ERROR If no coll components are found to be available.
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*
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* This function is invoked during ompi_mpi_init() to query all
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* successfully opened coll components and create a list of all
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* available coll components.
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*
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* This function traverses the (internal global variable) framework components
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* list and queries each component to see if it ever might want to run during
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* this MPI process. If a component does not want to run it is closed and
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* removed from the framework components list.
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*/
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int mca_coll_base_find_available(bool enable_progress_threads,
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bool enable_mpi_threads);
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/**
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* Select an available component for a new communicator.
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*
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* @param comm Communicator that the component will be selected for.
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* @param preferred The component that is preferred for this
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* communicator (or NULL).
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*
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* @return OMPI_SUCCESS Upon success.
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* @return OMPI_ERROR Upon failure.
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*
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* Note that the types of the parameters have "struct" in them
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* (e.g., ompi_communicator_t" vs. a plain "ompi_communicator_t") to
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* avoid an include file loop. All similar types (e.g., "struct
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* ompi_communicator_t *", "ompi_communicator_t *", and "MPI_Comm")
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* are all typedef'ed to be the same, so the fact that we use struct
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* here in the prototype is ok.
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*
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* This function is invoked when a new communicator is created and a
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* coll component needs to be selected for it. It should be invoked
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* near the end of the communicator creation process such that
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* almost everything else is functional on the communicator (e.g.,
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* point-to-point communication).
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*
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* Note that new communicators may be created as a result of
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* invoking this function. Specifically: this function is called in
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* the depths of communicator creation, but during the execution of
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* this function, new communicators may be created, and therefore
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* communicator creation functions may be re-entered (albiet with
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* different arguments).
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*/
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int mca_coll_base_comm_select(struct ompi_communicator_t *comm);
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/**
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* Finalize a coll component on a specific communicator.
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*
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* @param comm The communicator that is being destroyed.
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*
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* @retval OMPI_SUCCESS Always.
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*
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* Note that the type of the parameter is only a "struct
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* ompi_communicator_t" (vs. a plain "ompi_communicator_t") to avoid
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* an include file loop. The types "struct ompi_communicator_t *",
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* "ompi_communicator_t *", and "MPI_Comm" are all typedef'ed to be
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* the same, so the fact that we use struct here in the prototype is
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* ok.
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*
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* This function is invoked near the beginning of the destruction of
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* a communicator. It finalizes the coll component associated with the
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* communicator (e.g., allowing the component to clean up and free any
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* resources allocated for that communicator). Note that similar to
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* mca_coll_base_select(), as result of this function, other
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* communicators may also be destroyed.
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*/
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int mca_coll_base_comm_unselect(struct ompi_communicator_t *comm);
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/*
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* Globals
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*/
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OMPI_DECLSPEC extern mca_base_framework_t ompi_coll_base_framework;
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END_C_DECLS
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#endif /* MCA_BASE_COLL_H */
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