/*
 * Copyright (c) 2004-2009 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */
/**
 * @file
 *
 * Remote File Management (FileM) Interface
 *
 */

#ifndef MCA_FILEM_H
#define MCA_FILEM_H

#include "orte_config.h"
#include "orte/constants.h"
#include "orte/types.h"

#include "opal/mca/mca.h"
#include "opal/mca/base/base.h"

#include "opal/class/opal_object.h"

BEGIN_C_DECLS

/**
 * A set of flags that determine the type of the file
 * in question
 */
#define ORTE_FILEM_TYPE_FILE      0
#define ORTE_FILEM_TYPE_DIR       1
#define ORTE_FILEM_TYPE_UNKNOWN   2

/**
 * Type of moment
 */
#define ORTE_FILEM_MOVE_TYPE_PUT       0
#define ORTE_FILEM_MOVE_TYPE_GET       1
#define ORTE_FILEM_MOVE_TYPE_RM        2
#define ORTE_FILEM_MOVE_TYPE_UNKNOWN   3

/**
 * Hints that describe the local or remote file target for
 * optimization purposes.
 */
#define ORTE_FILEM_HINT_NONE   0
#define ORTE_FILEM_HINT_SHARED 1

/**
 * Define a Process Set
 *
 * Source: A single source of the operation.
 * Sink: Desitination of the operation.
 */
struct orte_filem_base_process_set_1_0_0_t {
    /** This is an object, so must have a super */
    opal_list_item_t super;

    /** Source Process */
    orte_process_name_t source;

    /** Sink Process */
    orte_process_name_t sink;
};
typedef struct orte_filem_base_process_set_1_0_0_t orte_filem_base_process_set_1_0_0_t;
typedef struct orte_filem_base_process_set_1_0_0_t orte_filem_base_process_set_t;

ORTE_DECLSPEC OBJ_CLASS_DECLARATION(orte_filem_base_process_set_t);

/**
 * Define a File Pair
 *
 * Local: Local file reference
 * Remove: Remote file reference
 *
 * Note: If multiple process sinks are used it is assumed that the 
 * file reference is the same for each of the sinks. If this is not
 * true then more than one filem request needs to be created.
 */
struct orte_filem_base_file_set_1_0_0_t {
    /** This is an object, so must have a super */
    opal_list_item_t super;

    /* Local file reference */
    char * local_target;

    /* Local file reference hints */
    int local_hint;

    /* Remove file reference */
    char * remote_target;

    /* Remote file reference hints */
    int remote_hint;

    /* Type of file to move */
    int target_flag;
};
typedef struct orte_filem_base_file_set_1_0_0_t orte_filem_base_file_set_1_0_0_t;
typedef struct orte_filem_base_file_set_1_0_0_t orte_filem_base_file_set_t;

ORTE_DECLSPEC OBJ_CLASS_DECLARATION(orte_filem_base_file_set_t);

/**
 * Definition of a file movement request
 * This will allow:
 *  - The movement of one or more files
 *  - to/from one or more processes
 * in a single call of the API function. Allowing the implementation
 * to optimize the sending/receiving of data.
 * Used for the following:
 * 
 */
struct orte_filem_base_request_1_0_0_t {
    /** This is an object, so must have a super */
    opal_list_item_t super;

    /*
     * A list of process sets
     */
    opal_list_t process_sets;

    /*
     * A list of file pairings
     */
    opal_list_t file_sets;

    /*
     * Internal use:
     * Number of movements
     */
    int num_mv;

    /*
     * Internal use:
     * Boolean to indianate if transfer is complete
     */
    bool *is_done;

    /*
     * Internal use:
     * Boolean to indianate if transfer is active
     */
    bool *is_active;

    /*
     * Internal use:
     * Exit status of the copy command
     */
    int32_t *exit_status;

    /*
     * Internal use:
     * Movement type
     */
    int movement_type;
};
typedef struct orte_filem_base_request_1_0_0_t orte_filem_base_request_1_0_0_t;
typedef struct orte_filem_base_request_1_0_0_t orte_filem_base_request_t;

ORTE_DECLSPEC OBJ_CLASS_DECLARATION(orte_filem_base_request_t);

/**
 * Module initialization function.
 * Returns ORTE_SUCCESS
 */
typedef int (*orte_filem_base_module_init_fn_t)
     (void);

/**
 * Module finalization function.
 * Returns ORTE_SUCCESS
 */
typedef int (*orte_filem_base_module_finalize_fn_t)
     (void);

/**
 * Put a file or directory on the remote machine
 *
 * Note: By using a relative path for the remote file/directory, the filem
 *       component will negotiate the correct absolute path for that file/directory
 *       for the remote machine.
 *
 * @param request FileM request describing the files/directories to send, 
 *        the remote files/directories to use, and the processes to see the change.
 * 
 * @return ORTE_SUCCESS on successful file transer
 * @return ORTE_ERROR on failed file transfer
 */
typedef int (*orte_filem_base_put_fn_t)
     (orte_filem_base_request_t *request);

/**
 * Put a file or directory on the remote machine (Async)
 *
 * Note: By using a relative path for the remote file/directory, the filem
 *       component will negotiate the correct absolute path for that file/directory
 *       for the remote machine.
 *
 * @param request FileM request describing the files/directories to send, 
 *        the remote files/directories to use, and the processes to see the change.
 * 
 * @return ORTE_SUCCESS on successful file transer
 * @return ORTE_ERROR on failed file transfer
 */
typedef int (*orte_filem_base_put_nb_fn_t)
     (orte_filem_base_request_t *request);

/**
 * Get a file from the remote machine
 *
 * Note: By using a relative path for the remote file/directory, the filem
 *       component will negotiate the correct absolute path for that file/directory
 *       for the remote machine.
 *
 * @param request FileM request describing the files/directories to receive, 
 *        the remote files/directories to use, and the processes to see the change.
 * 
 * @return ORTE_SUCCESS on successful file transer
 * @return ORTE_ERROR on failed file transfer
 */
typedef int (*orte_filem_base_get_fn_t)
     (orte_filem_base_request_t *request);

/**
 * Get a file from the remote machine (Async)
 *
 * Note: By using a relative path for the remote file/directory, the filem
 *       component will negotiate the correct absolute path for that file/directory
 *       for the remote machine.
 *
 * @param request FileM request describing the files/directories to receive, 
 *        the remote files/directories to use, and the processes to see the change.
 * 
 * @return ORTE_SUCCESS on successful file transer
 * @return ORTE_ERROR on failed file transfer
 */
typedef int (*orte_filem_base_get_nb_fn_t)
     (orte_filem_base_request_t *request);

/**
 * Remove a file from the remote machine
 * 
 * Note: By using a relative path for the remote file/directory, the filem
 *       component will negotiate the correct absolute path for that file/directory
 *       for the remote machine.
 *
 * @param request FileM request describing the remote files/directories to remove, 
 *        the processes to see the change.
 *
 * @return ORTE_SUCCESS on success
 * @return ORTE_ERROR on fail
 */
typedef int (*orte_filem_base_rm_fn_t)
     (orte_filem_base_request_t *request);

/**
 * Remove a file from the remote machine (Async)
 * 
 * Note: By using a relative path for the remote file/directory, the filem
 *       component will negotiate the correct absolute path for that file/directory
 *       for the remote machine.
 *
 * @param request FileM request describing the remote files/directories to remove, 
 *        the processes to see the change.
 *
 * @return ORTE_SUCCESS on success
 * @return ORTE_ERROR on fail
 */
typedef int (*orte_filem_base_rm_nb_fn_t)
     (orte_filem_base_request_t *request);

/**
 * Wait for a single file movement request to finish
 *
 * @param request FileM request describing the remote files/directories.
 *
 * The request must have been passed through one of the non-blocking functions
 * before calling wait or wait_all otherwise ORTE_ERROR will be returned.
 *
 * @return ORTE_SUCCESS on success
 * @return ORTE_ERROR on fail
 */
typedef int (*orte_filem_base_wait_fn_t)
     (orte_filem_base_request_t *request);

/**
 * Wait for a multiple file movement requests to finish
 *
 * @param request_list opal_list_t of FileM requests describing the remote files/directories.
 *
 * The request must have been passed through one of the non-blocking functions
 * before calling wait or wait_all otherwise ORTE_ERROR will be returned.
 *
 * @return ORTE_SUCCESS on success
 * @return ORTE_ERROR on fail
 */
typedef int (*orte_filem_base_wait_all_fn_t)
     (opal_list_t *request_list);

/**
 * Structure for FILEM components.
 */
struct orte_filem_base_component_2_0_0_t {
    /** MCA base component */
    mca_base_component_t base_version;
    /** MCA base data */
    mca_base_component_data_t base_data;

    /** Verbosity Level */
    int verbose;
    /** Output Handle for opal_output */
    int output_handle;
    /** Default Priority */
    int priority;
};
typedef struct orte_filem_base_component_2_0_0_t orte_filem_base_component_2_0_0_t;
typedef struct orte_filem_base_component_2_0_0_t orte_filem_base_component_t;

/**
 * Structure for FILEM  modules
 */
struct orte_filem_base_module_1_0_0_t {
    /** Initialization Function */
    orte_filem_base_module_init_fn_t           filem_init;
    /** Finalization Function */
    orte_filem_base_module_finalize_fn_t       filem_finalize;

    /** Put a file on the remote machine */
    orte_filem_base_put_fn_t                   put;
    orte_filem_base_put_nb_fn_t                put_nb;
    /** Get a file from the remote machine */
    orte_filem_base_get_fn_t                   get;
    orte_filem_base_get_nb_fn_t                get_nb;

    /** Remove a file on the remote machine */
    orte_filem_base_rm_fn_t                    rm;
    orte_filem_base_rm_nb_fn_t                 rm_nb;

    /** Test functions for the non-blocking versions */
    orte_filem_base_wait_fn_t                  wait;
    orte_filem_base_wait_all_fn_t              wait_all;

};
typedef struct orte_filem_base_module_1_0_0_t orte_filem_base_module_1_0_0_t;
typedef struct orte_filem_base_module_1_0_0_t orte_filem_base_module_t;

ORTE_DECLSPEC extern orte_filem_base_module_t orte_filem;

/**
 * Macro for use in components that are of type FILEM
 */
#define ORTE_FILEM_BASE_VERSION_2_0_0 \
    MCA_BASE_VERSION_2_0_0, \
    "filem", 2, 0, 0

END_C_DECLS

#endif /* ORTE_FILEM_H */