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130 lines
4.5 KiB
C
130 lines
4.5 KiB
C
#ifndef THREADQUEUE_H_
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#define THREADQUEUE_H_
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/*****************************************************************************
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* This file is part of Kvazaar HEVC encoder.
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*
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* Copyright (C) 2013-2014 Tampere University of Technology and others (see
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* COPYING file).
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*
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* Kvazaar is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Kvazaar 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 Kvazaar. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#include "global.h"
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#include <pthread.h>
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#include "threads.h"
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typedef enum {
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THREADQUEUE_JOB_STATE_QUEUED = 0,
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THREADQUEUE_JOB_STATE_RUNNING = 1,
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THREADQUEUE_JOB_STATE_DONE = 2
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} threadqueue_job_state;
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typedef struct threadqueue_job {
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pthread_mutex_t lock;
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threadqueue_job_state state;
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unsigned int ndepends; //Number of active dependencies that this job wait for
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struct threadqueue_job **rdepends; //array of pointer to jobs that depend on this one. They have to exist when the thread finishes, because they cannot be run before.
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unsigned int rdepends_count; //number of rdepends
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unsigned int rdepends_size; //allocated size of rdepends
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//Job function and state to use
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void (*fptr)(void *arg);
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void *arg;
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#ifdef _DEBUG
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const char* debug_description;
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int debug_worker_id;
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CLOCK_T debug_clock_enqueue;
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CLOCK_T debug_clock_start;
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CLOCK_T debug_clock_stop;
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CLOCK_T debug_clock_dequeue;
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#endif
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} threadqueue_job;
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typedef struct {
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pthread_mutex_t lock;
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pthread_cond_t cond;
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pthread_cond_t cb_cond;
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pthread_t *threads;
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int threads_count;
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int threads_running;
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int stop; //=>1: threads should stop asap
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threadqueue_job **queue;
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unsigned int queue_start;
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unsigned int queue_count;
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unsigned int queue_size;
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unsigned int queue_waiting;
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#ifdef _DEBUG
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//Format: pointer <tab> worker id <tab> time enqueued <tab> time started <tab> time stopped <tab> time dequeued <tab> job description
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//For threads, pointer = "" and job description == "thread", time enqueued and time dequeued are equal to "-"
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//For flush, pointer = "" and job description == "FLUSH", time enqueued, time dequeued and time started are equal to "-"
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//Each time field, except the first one in the line be expressed in a relative way, by prepending the number of seconds by +.
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//Dependencies: pointer -> pointer
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FILE *debug_log;
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CLOCK_T *debug_clock_thread_start;
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CLOCK_T *debug_clock_thread_end;
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#endif
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} threadqueue_queue;
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//Init a threadqueue
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int threadqueue_init(threadqueue_queue * threadqueue, int thread_count);
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//Add a job to the queue, and returs a threadqueue_job handle. If wait == 1, one has to run threadqueue_job_unwait_job in order to have it run
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threadqueue_job * threadqueue_submit(threadqueue_queue * threadqueue, void (*fptr)(void *arg), void *arg, int wait, const char* debug_description);
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int threadqueue_job_unwait_job(threadqueue_queue * threadqueue, threadqueue_job *job);
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//Add a dependency between two jobs.
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int threadqueue_job_dep_add(threadqueue_job *job, threadqueue_job *depends_on);
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//Blocking call until the queue is empty. Previously set threadqueue_job handles should not be used anymore
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int threadqueue_flush(threadqueue_queue * threadqueue);
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//Free ressources in a threadqueue
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int threadqueue_finalize(threadqueue_queue * threadqueue);
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#ifdef _DEBUG
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int threadqueue_log(threadqueue_queue * threadqueue, const CLOCK_T *start, const CLOCK_T *stop, const char* debug_description);
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//This macro HAS TO BE at the beginning of a block
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#define PERFORMANCE_MEASURE_START() CLOCK_T start, stop; GET_TIME(&start)
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#define PERFORMANCE_MEASURE_END(threadqueue, str, ...) do {GET_TIME(&stop); {char job_description[256]; sprintf(job_description, (str), __VA_ARGS__); threadqueue_log((threadqueue), &start, &stop, job_description); }} while (0)
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#else
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#define PERFORMANCE_MEASURE_START() do {} while (0)
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#define PERFORMANCE_MEASURE_END(threadqueue, str, ...) do {} while (0)
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#endif
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/* Constraints:
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*
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* - Always first lock threadqueue, than a job inside it
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* - When job A depends on job B, always lock first job B and then job A
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*
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* */
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#endif //THREADQUEUE_H_
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