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1063 tullio 1
 
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/*
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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/**
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   @file distributed spare capacity
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*/
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//fsf_distributed_spare_capacity.h
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//=====================================================================
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//       FFFFFFIII   RRRRR      SSTTTTTTT
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//      FF         IIR   RR    SS
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//     FF           IR        SS
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//    FFFFFF         RRRR    SSSSST
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//   FF       FI       RRR  SS
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//  FF         II     RRR  SS
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// FF           IIIIIR    RS
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//
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// FSF(FIRST Scheduling Framework)
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// distributed spare capacity functionality
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//=====================================================================
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#include "fsf_core.h"
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#include "fsf_distributed.h"
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#ifndef _FSF_DISTRIBUTED_SPARE_CAPACITY_H_
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#define _FSF_DISTRIBUTED_SPARE_CAPACITY_H_
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#define FSF_DISTRIBUTED_SPARE_CAPACITY_MODULE_SUPPORTED       1
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/**
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   \ingroup distsparemodule
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   This operation sets the granted capacity flag in the contract
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   parameters object pointed to by contract to the boolean specified
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   in granted_capacity_flag. This flag indicates to the scheduler that
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   once the negotiation of the respective contract is finished, the
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   first values for the budget and period given to the corresponding
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   server must not be changed due to the negotiation or renegotiation
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   of any other contract in the system. The period can change, though,
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   if a renegotiation or a change of quality and importance is
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   requested for the corresponding server.
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   @param contract   the pointer to the contract object
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   @param[in] granted_capacity_flag boolean value set to true to
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     avoid the change in the period due to changes in other servers
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   @retval  FSF_ERR_BAD_ARGUMENT :  if contract is NULL
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*/
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int
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fsf_set_contract_granted_capacity_flag
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  (fsf_contract_parameters_t *contract,
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   bool                    granted_capacity_flag);
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/**
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   \ingroup distsparemodule
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   This operation returns in the place pointed to by
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   granted_capacity_flag the value of the corresponding flag in the
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   contract parameters object pointed to by contract.
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   @param[in] contract   the pointer to the contract object
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   @param[in] granted_capacity_flag pointer to the variable that
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     will contain the boolean value of the granted_capacity_flag
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   @retval  FSF_ERR_BAD_ARGUMENT :  if any of the pointers is NULL
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*/
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int
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fsf_get_contract_granted_capacity_flag
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  (fsf_contract_parameters_t *contract,
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   bool                   *granted_capacity_flag);
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/**
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   \ingroup distsparemodule
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   This operation is used to return spare capacity that was assigned
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   to a server but that cannot be used due to restrictions in other
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   servers of a distributed transaction.  This operation changes the
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   cycle period and budget of the given server to the values given in
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   new_period and new_budget, respectively.
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   @param [in] server server id
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   @param [in] new_period pointer to the new period value
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   @param [in] new_budget pointer to the new budget value
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   @retval  FSF_ERR_BAD_ARGUMENT :  if (the server does not have
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     the granted_capacity flag set) or
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     (the new period is less than the current one), or
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     (the new budget is larger than the current one), or
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     (the new period is greater than the maximum period currently
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       specified in the contract associated to the server), or
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     (the new budget is smaller than the minimum budget in the contract) or
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     (if the granularity is discrete and the new period and budget
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      do not match any of the period-budget pairs in the utilization
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      set of the server).
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*/
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int
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fsf_set_server_capacity
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   (fsf_server_id_t          server,
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    const struct timespec   *new_period,
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    const struct timespec   *new_budget);
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#endif // _FSF_DISTRIBUTED_SPARE_CAPACITY_H_