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//
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// this work for additional information regarding copyright ownership.
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// License.
//
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/*
    This file contains all necessary methods to keep track of the indication
    objects created in a particular context.
*/


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU)
# include <error.h>
#endif


#include "indication_objects.h"
#include "debug.h"

#include <Pegasus/Provider/CMPI/cmpidt.h>
#include <Pegasus/Provider/CMPI/cmpimacs.h>
#include <Pegasus/Provider/CMPI/cmpift.h>

extern CMPIBrokerExtFT *CMPI_BrokerExt_Ftab;

static indication_objects *__indication_objects = NULL;

static CMPI_MUTEX_TYPE _indication_objects_lock = NULL;

#define INIT_LOCK(l) if (l==NULL) l=CMPI_BrokerExt_Ftab->newMutex(0);


// Helper function
void __free_ind_object (ind_object *obj)
{
    switch (obj->type)
    {
        case PEGASUS_INDICATION_OBJECT_TYPE_CMPI_SELECT_EXP :
            CMRelease ( (CMPISelectExp*)obj->ptr);
            break;
        case PEGASUS_INDICATION_OBJECT_TYPE_CMPI_SELECT_COND:
            CMRelease ( (CMPISelectCond*)obj->ptr);
            break;
        case PEGASUS_INDICATION_OBJECT_TYPE_CMPI_SUB_COND:
            CMRelease ( (CMPISubCond*)obj->ptr);
            break;
        case PEGASUS_INDICATION_OBJECT_TYPE_CMPI_PREDICATE:
            CMRelease ( (CMPIPredicate*)obj->ptr);
            break;
        default :
            TRACE_CRITICAL(("Unknown Object type: %d", obj->type ));
    }
}

/*
    This function creates reference to the Object created in MB.
    This reference is passed to Remote Daemon, any changes or any
    calls made on this object on daemon side, will make UP calls
    to MB and uses this object.
*/
CMPIUint64 create_indicationObject (
    void *obj,
    CMPIUint32 ctx_id,
    CMPIUint8 type)
{
    indication_objects *tmp;
    ind_object *ind_obj;

    TRACE_NORMAL(("Creating Indication Object."));

    INIT_LOCK(_indication_objects_lock);
    CMPI_BrokerExt_Ftab->lockMutex(_indication_objects_lock);

    tmp = __indication_objects;
    while (tmp)
    {
        if (tmp->ctx_id == ctx_id)
        {
            break;
        }
        tmp = tmp->next;
    }
    if (!tmp)
    {
        tmp = (indication_objects *)
        malloc ( sizeof ( indication_objects ) );
        tmp->ctx_id = ctx_id;
        tmp->next = __indication_objects;
        __indication_objects = tmp;
        tmp->objects = NULL;
    }
    ind_obj = (ind_object*) malloc ( sizeof ( ind_object ) );
    ind_obj->id = (ssize_t) obj;
    ind_obj->ptr = obj;
    ind_obj->type = type;
    ind_obj->next = tmp->objects;
    tmp->objects = ind_obj;

    CMPI_BrokerExt_Ftab->unlockMutex(_indication_objects_lock);

    TRACE_INFO(("Created object with id: %llu", ind_obj->id ));

    return ind_obj->id;
}

int remove_indicationObject (void *obj, CMPIUint32 ctx_id)
{
    ind_object **tmp;
    indication_objects *curr;
    CMPIUint64 id = ( (ind_object*)obj)->id;

    TRACE_NORMAL(("Deleting Indication Object."));

    INIT_LOCK(_indication_objects_lock);
    CMPI_BrokerExt_Ftab->lockMutex(_indication_objects_lock);
    curr = __indication_objects;
    while (curr)
    {
        if (curr->ctx_id == ctx_id)
        {
            break;
        }
        curr = curr->next;
    }
    for (tmp = &curr->objects; *tmp != NULL; *tmp = (*tmp)->next)
    {
        if ((*tmp)->id == id)
        {
            ind_object *r = (*tmp);
            (*tmp) = r->next;
            __free_ind_object (r);
            TRACE_INFO(("Deleted Indication Object with ID: %llu", id));
            CMPI_BrokerExt_Ftab->unlockMutex(_indication_objects_lock);
            return 0;
        }
    }
    CMPI_BrokerExt_Ftab->unlockMutex(_indication_objects_lock);
    return -1;
}

void* get_indicationObject (CMPIUint64 id, CMPIUint32 ctx_id)
{
    indication_objects *curr;
    ind_object *tmp;
    int global_context = 0;

    TRACE_NORMAL(("Getting the  Indication Object."));

    INIT_LOCK(_indication_objects_lock);
    CMPI_BrokerExt_Ftab->lockMutex(_indication_objects_lock);

    do
    {
        curr = __indication_objects;
        while (curr)
        {
            if (curr->ctx_id == ctx_id)
            {
                break;
            }
            curr = curr->next;
        }
        if (!curr && !global_context)
        {
            global_context = 1;
            ctx_id = PEGASUS_INDICATION_GLOBAL_CONTEXT;
        }
        else
        {
            break;
        }
    }while (global_context);

    for (tmp = curr ? curr->objects : NULL; tmp != NULL; tmp = tmp->next)
    {
        if (tmp->id == id)
        {
            TRACE_INFO(("Got the Indication Object with ID: %llu", id));
            CMPI_BrokerExt_Ftab->unlockMutex(_indication_objects_lock);
            return tmp->ptr;
        }
    }
    CMPI_BrokerExt_Ftab->unlockMutex(_indication_objects_lock);

    return NULL;

}

void cleanup_indicationObjects (CMPIUint32 ctx_id)
{
    indication_objects *tmp, *prev;
    ind_object *obj;

    TRACE_NORMAL(("Cleaning all Indication Objects."));

    INIT_LOCK(_indication_objects_lock);
    CMPI_BrokerExt_Ftab->lockMutex(_indication_objects_lock);
    tmp = __indication_objects;
    while (tmp)
    {
        if (tmp->ctx_id == ctx_id)
        {
            break;
        }
        prev = tmp;
        tmp = tmp->next;
    }
    if (!tmp)
    {
        TRACE_CRITICAL(("Indication context id (%u) not found.", ctx_id));
        return;
    }
    while (tmp->objects)
    {
        obj = tmp->objects;
        tmp->objects = tmp->objects->next;
        __free_ind_object (obj);
    }
    if (tmp == __indication_objects)
    {
        __indication_objects = __indication_objects->next;
    }
    else
    {
        prev->next = tmp->next;
    }
    free (tmp);
    CMPI_BrokerExt_Ftab->unlockMutex(_indication_objects_lock);
}