163 lines
5.0 KiB
C
163 lines
5.0 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2015 Eurecom
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OpenAirInterface 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 3 of the License, or
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(at your option) any later version.
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OpenAirInterface 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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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@eurecom.fr
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Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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/*! \file enb_agent_task_manager.h
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* \brief Implementation of scheduled tasks manager for the enb agent
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* \author Xenofon Foukas
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* \date January 2016
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* \version 0.1
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* \email: x.foukas@sms.ed.ac.uk
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* @ingroup _mac
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*/
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#ifndef ENB_AGENT_TASK_MANAGER_
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#define ENB_AGENT_TASK_MANAGER_
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#include <stdint.h>
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#include <pthread.h>
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#include "flexran.pb-c.h"
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#include "enb_agent_common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define DEFAULT_CAPACITY 512
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/**
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* The structure containing the enb agent task to be executed
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*/
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typedef struct enb_agent_task_s {
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/* The frame in which the task needs to be executed */
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uint16_t frame_num;
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/* The subframe in which the task needs to be executed */
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uint8_t subframe_num;
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/* The task to be executed in the form of a Protocol__FlexranMessage */
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Protocol__FlexranMessage *task;
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} enb_agent_task_t;
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/**
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* Priority Queue Structure for tasks
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*/
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typedef struct enb_agent_task_queue_s {
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mid_t mod_id;
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/* The amount of allocated memory for agent tasks in the heap*/
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volatile size_t capacity;
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/* The actual size of the tasks heap at a certain time */
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volatile size_t count;
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/* The earliest frame that has a pending task */
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volatile uint16_t first_frame;
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/* The earliest subframe within the frame that has a pending task */
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volatile uint8_t first_subframe;
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/* An array of prioritized tasks stored in a heap */
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enb_agent_task_t **task;
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/* A pointer to a comparator function, used to prioritize elements */
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int (*cmp)(mid_t mod_id, const enb_agent_task_t *t1, const enb_agent_task_t *t2);
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pthread_mutex_t *mutex;
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} enb_agent_task_queue_t;
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typedef enum {
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HEAP_OK = 0,
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HEAP_EMPTY,
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HEAP_FAILED,
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HEAP_REALLOCERROR,
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HEAP_NOREALLOC,
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HEAP_FATAL,
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} heapstatus_e;
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/**
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* Allocate memory for a task in the queue
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*/
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enb_agent_task_t *enb_agent_task_create(Protocol__FlexranMessage *msg,
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uint16_t frame_num, uint8_t subframe_num);
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/**
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* Free memory for a task of the queue
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*/
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void enb_agent_task_destroy(enb_agent_task_t *task);
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/**
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* Allocate initial memory for storing the tasks
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*/
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enb_agent_task_queue_t *enb_agent_task_queue_init(mid_t mod_id, size_t capacity,
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int (*cmp)(mid_t mod_id, const enb_agent_task_t *t1, const enb_agent_task_t *t2));
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/**
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* Allocate initial memory for storing the tasks using default parameters
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*/
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enb_agent_task_queue_t *enb_agent_task_queue_default_init(mid_t mod_id);
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/**
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* De-allocate memory for the tasks queue
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*/
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void enb_agent_task_queue_destroy(enb_agent_task_queue_t *queue);
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/**
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* Insert task into the queue
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*/
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int enb_agent_task_queue_put(enb_agent_task_queue_t *queue, enb_agent_task_t *task);
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/**
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* Remove the task with the highest priority from the queue
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* task becomes NULL if there is no task for the current frame and subframe
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*/
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int enb_agent_task_queue_get_current_task(enb_agent_task_queue_t *queue, enb_agent_task_t **task);
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/**
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* Check if the top priority task is for a specific frame and subframe
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*/
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int enb_agent_task_queue_has_upcoming_task (enb_agent_task_queue_t *queue,
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const uint16_t frame, const uint8_t subframe);
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/**
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* Restructure heap after modifications
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*/
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void _enb_agent_task_queue_heapify(enb_agent_task_queue_t *queue, size_t idx);
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/**
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* Reallocate memory once the heap reaches max size
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*/
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int _enb_agent_task_queue_realloc_heap(enb_agent_task_queue_t *queue);
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/**
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* Compare two agent tasks based on frame and subframe
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* returns 0 if tasks t1, t2 have the same priority
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* return negative value if t1 needs to be executed after t2
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* return positive value if t1 preceeds t2
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* Need to give eNB id for the comparisson based on the current frame-subframe
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*/
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int _enb_agent_task_queue_cmp(mid_t mod_id, const enb_agent_task_t *t1, const enb_agent_task_t *t2);
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#ifdef __cplusplus
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}
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#endif
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#endif /*ENB_AGENT_TASK_MANAGER_*/
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