/*
 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2007 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) 2004-2006 The Regents of the University of California.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */
/**
 *  @file 
 */

#ifndef MCA_PML_DR_H
#define MCA_PML_DR_H

#include "ompi_config.h"
#include "opal/util/crc.h"
#include "ompi/class/ompi_free_list.h"
#include "ompi/request/request.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/mca/pml/base/pml_base_request.h"
#include "ompi/mca/pml/base/pml_base_bsend.h"
#include "ompi/mca/pml/base/pml_base_sendreq.h"
#include "ompi/class/ompi_pointer_array.h"
#include "ompi/mca/btl/btl.h"
#include "ompi/datatype/datatype.h"

#if defined(c_plusplus) || defined(__cplusplus)
extern "C" {
#endif

/**
 * DR PML module
 */

struct mca_pml_dr_t {
    mca_pml_base_module_t super; 

    int priority;
    int free_list_num;      /* initial size of free list */
    int free_list_max;      /* maximum size of free list */
    int free_list_inc;      /* number of elements to grow free list */
    size_t eager_limit;     /* maximum eager limit size - overrides btl setting */
    size_t send_pipeline_depth;
    bool enabled;

    /* lock queue accesses */
    opal_mutex_t lock;

    time_t tout_ack;
    time_t tout_watch_dog;

    /* pending lists */
    opal_list_t send_pending;
    opal_list_t acks_pending;
    
    /* active lists */
    opal_list_t send_active;
    
    /* free lists */
    ompi_free_list_t recv_frags;
    ompi_free_list_t vfrags;
    ompi_free_list_t buffers;
    
    /* endpoint pointer array */
    ompi_pointer_array_t endpoints;
    
    /* my 'global' rank */ 
    int32_t my_rank;
    
    struct timeval wdog_timer;
    int wdog_timer_multiplier;
    int wdog_retry_max;

    struct timeval  ack_timer;
    int ack_timer_multiplier;
    int ack_retry_max;

    /* enable/disable csum */ 
    int enable_csum;
};
typedef struct mca_pml_dr_t mca_pml_dr_t; 

extern mca_pml_dr_t mca_pml_dr;

/*
 * PML interface functions.
 */

extern int mca_pml_dr_add_comm(
    struct ompi_communicator_t* comm
);

extern int mca_pml_dr_del_comm(
    struct ompi_communicator_t* comm
);

extern int mca_pml_dr_add_procs(
    struct ompi_proc_t **procs,
    size_t nprocs
);

extern int mca_pml_dr_del_procs(
    struct ompi_proc_t **procs,
    size_t nprocs
);

extern int mca_pml_dr_enable(
    bool enable
);

extern int mca_pml_dr_progress(void);

extern int mca_pml_dr_iprobe(
    int dst,
    int tag,
    struct ompi_communicator_t* comm,
    int *matched,
    ompi_status_public_t* status
);

extern int mca_pml_dr_probe(
    int dst,
    int tag,
    struct ompi_communicator_t* comm,
    ompi_status_public_t* status
);

extern int mca_pml_dr_isend_init(
    void *buf,
    size_t count,
    ompi_datatype_t *datatype,
    int dst,
    int tag,
    mca_pml_base_send_mode_t mode,
    struct ompi_communicator_t* comm,
    struct ompi_request_t **request
);

extern int mca_pml_dr_isend(
    void *buf,
    size_t count,
    ompi_datatype_t *datatype,
    int dst,
    int tag,
    mca_pml_base_send_mode_t mode,
    struct ompi_communicator_t* comm,
    struct ompi_request_t **request
);

extern int mca_pml_dr_send(
    void *buf,
    size_t count,
    ompi_datatype_t *datatype,
    int dst,
    int tag,
    mca_pml_base_send_mode_t mode,
    struct ompi_communicator_t* comm
);

extern int mca_pml_dr_irecv_init(
    void *buf,
    size_t count,
    ompi_datatype_t *datatype,
    int src,
    int tag,
    struct ompi_communicator_t* comm,
    struct ompi_request_t **request
);

extern int mca_pml_dr_irecv(
    void *buf,
    size_t count,
    ompi_datatype_t *datatype,
    int src,
    int tag,
    struct ompi_communicator_t* comm,
    struct ompi_request_t **request
);

extern int mca_pml_dr_recv(
    void *buf,
    size_t count,
    ompi_datatype_t *datatype,
    int src,
    int tag,
    struct ompi_communicator_t* comm,
    ompi_status_public_t* status
);

extern int mca_pml_dr_dump(
    struct ompi_communicator_t* comm,
    int verbose
);

extern int mca_pml_dr_progress(void);

extern int mca_pml_dr_start(
    size_t count,
    ompi_request_t** requests
);

extern int mca_pml_dr_ft_event(int state);

#if defined(c_plusplus) || defined(__cplusplus)
}
#endif


#define MCA_PML_DR_DES_ALLOC(bml_btl, des, size)        \
    MCA_BML_BASE_BTL_DES_ALLOC(bml_btl, des, MCA_BTL_NO_ORDER,          \
 sizeof(mca_pml_dr_hdr_t) + (sizeof(mca_btl_base_segment_t) << 4),size)

#endif


#define MCA_PML_DR_DEBUG_LEVEL -1
#define MCA_PML_DR_DEBUG(level,msg)             \
    if(level <= MCA_PML_DR_DEBUG_LEVEL){        \
        OPAL_OUTPUT(msg);                       \
    }