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/*
* Copyright 2018 Anton Khirnov <anton@khirnov.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* This is the public API for interaction between the individual worker threads
* and the pool.
*/
#ifndef TP_WORKER_H
#define TP_WORKER_H
typedef struct TPContext WorkSource;
typedef struct WorkBatch {
int (*job_func)(void *arg, unsigned int job_idx, unsigned int thread_idx);
void *func_arg;
unsigned int job_idx_start;
unsigned int job_idx_end;
int finish;
} WorkBatch;
/**
* Called by the worker with index worker_idx to wait for a new batch of jobs.
*
* @return 0 if wb has been successfully filled, a negative error otherwise
*/
int tpi_worksource_wait_jobs(WorkSource *ws, unsigned int worker_idx,
WorkBatch *wb);
/**
* Steal a job from another worker.
*
* @return a non-negative job index if a job was successfully stolen
* -1 if there are no more jobs available
*/
int tpi_worksource_steal_job(WorkSource *ws, unsigned int worker_idx);
typedef struct Worker Worker;
/**
* Launch a new worker with the given unique index worker_idx.
*
* @return 0 if the worker has been launched, a negative error code otherwise
*/
int tpi_worker_spawn(Worker **w, unsigned int worker_idx, WorkSource *ws);
void tpi_worker_destroy(Worker **w);
/**
* Called by the work source to steal a job.
*
* @return a non-negative job index if a job was successfully stolen
* -1 if there are no more jobs available.
*/
int tpi_worker_steal_job(Worker *w);
#endif // TP_WORKER_H
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