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/* pps-job-scheduler.c
* this file is part of papers, a gnome document viewer
*
* Copyright (C) 2008 Carlos Garcia Campos <carlosgc@gnome.org>
*
* Papers 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 2 of the License, or
* (at your option) any later version.
*
* Papers 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "pps-job-scheduler.h"
#ifdef G_LOG_DOMAIN
#undef G_LOG_DOMAIN
#endif
#define G_LOG_DOMAIN "PpsJobScheduler"
typedef struct _PpsSchedulerJob {
PpsJob *job;
PpsJobPriority priority;
} PpsSchedulerJob;
static gpointer
pps_jobs_hash_init (gpointer data)
{
return g_hash_table_new (NULL, NULL);
}
static GHashTable *
pps_jobs_hash (void)
{
static GOnce once_init = G_ONCE_INIT;
g_once (&once_init, pps_jobs_hash_init, NULL);
return once_init.retval;
}
static void
pps_scheduler_job_free (PpsSchedulerJob *job)
{
if (!job)
return;
g_object_unref (job->job);
g_free (job);
}
static void
pps_scheduler_job_destroy (PpsSchedulerJob *job)
{
g_debug ("destroying job: %s", PPS_GET_TYPE_NAME (job->job));
g_hash_table_remove (pps_jobs_hash (), job);
pps_scheduler_job_free (job);
}
static void
pps_job_thread (PpsSchedulerJob *scheduler_job, gpointer data)
{
PpsJob *job = scheduler_job->job;
g_debug ("running thread for job: %s", PPS_GET_TYPE_NAME (job));
if (!g_cancellable_is_cancelled (pps_job_get_cancellable (job)))
pps_job_run (job);
pps_scheduler_job_destroy (scheduler_job);
}
static gint
job_priority_compare (PpsSchedulerJob *a,
PpsSchedulerJob *b,
gpointer data)
{
return (gint) a->priority - (gint) b->priority;
}
static gpointer
pps_job_scheduler_init (gpointer data)
{
/* We limit the thread numbers to 8 since threads above 8 may result
* increased latency on some machine. For example, AMD 5950x.
*/
GThreadPool *pool = g_thread_pool_new_full ((GFunc) pps_job_thread, NULL,
(GDestroyNotify) pps_scheduler_job_destroy,
/* MIN (8, g_get_num_processors()),
* Temporary remove multi-threading. See
* https://gitlab.gnome.org/GNOME/papers/-/issues/107
* for more context
*/
1,
TRUE, NULL);
g_thread_pool_set_sort_function (pool, (GCompareDataFunc) job_priority_compare, NULL);
return pool;
}
static GThreadPool *
pps_thread_pool (void)
{
static GOnce once_init = G_ONCE_INIT;
g_once (&once_init, pps_job_scheduler_init, NULL);
return once_init.retval;
}
static void
pps_job_queue_push (PpsSchedulerJob *job)
{
g_debug ("pushing job: %s, priority: %d",
PPS_GET_TYPE_NAME (job->job), job->priority);
g_hash_table_insert (pps_jobs_hash (), job->job, job);
g_thread_pool_push (pps_thread_pool (), job, NULL);
}
void
pps_job_scheduler_push_job (PpsJob *job,
PpsJobPriority priority)
{
PpsSchedulerJob *s_job;
s_job = g_new0 (PpsSchedulerJob, 1);
s_job->job = g_object_ref (job);
s_job->priority = priority;
pps_job_queue_push (s_job);
}
void
pps_job_scheduler_update_job (PpsJob *job,
PpsJobPriority priority)
{
g_debug ("update priority for job: %s, priority %d",
PPS_GET_TYPE_NAME (job), priority);
if (priority == PPS_JOB_PRIORITY_URGENT)
g_thread_pool_move_to_front (pps_thread_pool (),
g_hash_table_lookup (pps_jobs_hash (), job));
}
/**
* pps_job_scheduler_wait:
*
* Synchronously waits until all jobs are done.
* Remember that main loop is not running already probably.
*/
void
pps_job_scheduler_wait (void)
{
g_debug ("Waiting for empty job list");
while (g_thread_pool_unprocessed (pps_thread_pool ()))
g_usleep (100);
g_debug ("Job list is empty");
}
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