From 68d0fc3c59185065d9694ba3f8cb2665b984eb9f Mon Sep 17 00:00:00 2001 From: Carlos Garcia Campos Date: Sun, 18 Jan 2009 11:53:54 +0000 Subject: Move EvView specific code to a libeviview library so that it can be 2009-01-18 Carlos Garcia Campos * configure.ac: * Makefile.am: * libdocument/Makefile.am: * libview/Makefile.am: * libview/ev-job-scheduler.[ch]: * libview/ev-jobs.[ch]: * libview/ev-page-cache.[ch]: * libview/ev-pixbuf-cache.[ch]: * libview/ev-timeline.[ch]: * libview/ev-transition-animation.[ch]: * libview/ev-view-accessible.[ch]: * libview/ev-view-marshal.list: * libview/ev-view.[ch]: * shell/Makefile.am: Move EvView specific code to a libeviview library so that it can be embbeded in other applications. Based on patches by Tomeu Vizoso. Fixes bug #567751. svn path=/trunk/; revision=3348 --- (limited to 'libview/ev-job-scheduler.c') diff --git a/libview/ev-job-scheduler.c b/libview/ev-job-scheduler.c new file mode 100644 index 0000000..900714e --- /dev/null +++ b/libview/ev-job-scheduler.c @@ -0,0 +1,305 @@ +/* ev-job-scheduler.c + * this file is part of evince, a gnome document viewer + * + * Copyright (C) 2008 Carlos Garcia Campos + * + * Evince 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. + * + * Evince 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + */ + +#include "ev-debug.h" +#include "ev-job-scheduler.h" + +typedef struct _EvSchedulerJob { + EvJob *job; + EvJobPriority priority; + GSList *job_link; +} EvSchedulerJob; + +G_LOCK_DEFINE_STATIC(job_list); +static GSList *job_list = NULL; + +static gpointer ev_job_thread_proxy (gpointer data); +static void ev_scheduler_thread_job_cancelled (EvSchedulerJob *job, + GCancellable *cancellable); + +/* EvJobQueue */ +static GQueue queue_urgent = G_QUEUE_INIT; +static GQueue queue_high = G_QUEUE_INIT; +static GQueue queue_low = G_QUEUE_INIT; +static GQueue queue_none = G_QUEUE_INIT; + +static GCond *job_queue_cond = NULL; +static GMutex *job_queue_mutex = NULL; +static GQueue *job_queue[EV_JOB_N_PRIORITIES] = { + &queue_urgent, + &queue_high, + &queue_low, + &queue_none +}; + +static void +ev_job_queue_push (EvSchedulerJob *job, + EvJobPriority priority) +{ + ev_debug_message (DEBUG_JOBS, "%s priority %d", EV_GET_TYPE_NAME (job->job), priority); + + g_mutex_lock (job_queue_mutex); + + g_queue_push_tail (job_queue[priority], job); + g_cond_broadcast (job_queue_cond); + + g_mutex_unlock (job_queue_mutex); +} + +static EvSchedulerJob * +ev_job_queue_get_next_unlocked (void) +{ + gint i; + EvSchedulerJob *job = NULL; + + for (i = EV_JOB_PRIORITY_URGENT; i < EV_JOB_N_PRIORITIES; i++) { + job = (EvSchedulerJob *) g_queue_pop_head (job_queue[i]); + if (job) + break; + } + + ev_debug_message (DEBUG_JOBS, "%s", job ? EV_GET_TYPE_NAME (job->job) : "No jobs in queue"); + + return job; +} + +static gpointer +ev_job_scheduler_init (gpointer data) +{ + job_queue_cond = g_cond_new (); + job_queue_mutex = g_mutex_new (); + g_thread_create (ev_job_thread_proxy, NULL, FALSE, NULL); + + return NULL; +} + +static void +ev_scheduler_job_list_add (EvSchedulerJob *job) +{ + ev_debug_message (DEBUG_JOBS, "%s", EV_GET_TYPE_NAME (job->job)); + + G_LOCK (job_list); + + job_list = g_slist_prepend (job_list, job); + job->job_link = job_list; + + G_UNLOCK (job_list); +} + +static void +ev_scheduler_job_list_remove (EvSchedulerJob *job) +{ + ev_debug_message (DEBUG_JOBS, "%s", EV_GET_TYPE_NAME (job->job)); + + G_LOCK (job_list); + + job_list = g_slist_delete_link (job_list, job->job_link); + + G_UNLOCK (job_list); +} + +static void +ev_scheduler_job_free (EvSchedulerJob *job) +{ + if (!job) + return; + + g_object_unref (job->job); + g_free (job); +} + +static void +ev_scheduler_job_destroy (EvSchedulerJob *job) +{ + ev_debug_message (DEBUG_JOBS, "%s", EV_GET_TYPE_NAME (job->job)); + + if (job->job->run_mode == EV_JOB_RUN_MAIN_LOOP) { + g_signal_handlers_disconnect_by_func (job->job, + G_CALLBACK (ev_scheduler_job_destroy), + job); + } else { + g_signal_handlers_disconnect_by_func (job->job->cancellable, + G_CALLBACK (ev_scheduler_thread_job_cancelled), + job); + } + + ev_scheduler_job_list_remove (job); + ev_scheduler_job_free (job); +} + +static void +ev_scheduler_thread_job_cancelled (EvSchedulerJob *job, + GCancellable *cancellable) +{ + GList *list; + + ev_debug_message (DEBUG_JOBS, "%s", EV_GET_TYPE_NAME (job->job)); + + g_mutex_lock (job_queue_mutex); + + /* If the job is not still running, + * remove it from the job queue and job list. + * If the job is currently running, it will be + * destroyed as soon as it finishes. + */ + list = g_queue_find (job_queue[job->priority], job); + if (list) { + g_queue_delete_link (job_queue[job->priority], list); + g_mutex_unlock (job_queue_mutex); + ev_scheduler_job_destroy (job); + } else { + g_mutex_unlock (job_queue_mutex); + } +} + +static void +ev_job_thread (EvJob *job) +{ + gboolean result; + + ev_debug_message (DEBUG_JOBS, "%s", EV_GET_TYPE_NAME (job)); + + do { + if (g_cancellable_is_cancelled (job->cancellable)) + result = FALSE; + else + result = ev_job_run (job); + } while (result); +} + +static gboolean +ev_job_idle (EvJob *job) +{ + ev_debug_message (DEBUG_JOBS, "%s", EV_GET_TYPE_NAME (job)); + + if (g_cancellable_is_cancelled (job->cancellable)) + return FALSE; + + return ev_job_run (job); +} + +static gpointer +ev_job_thread_proxy (gpointer data) +{ + while (TRUE) { + EvSchedulerJob *job; + + g_mutex_lock (job_queue_mutex); + job = ev_job_queue_get_next_unlocked (); + if (!job) { + g_cond_wait (job_queue_cond, job_queue_mutex); + g_mutex_unlock (job_queue_mutex); + continue; + } + g_mutex_unlock (job_queue_mutex); + + ev_job_thread (job->job); + ev_scheduler_job_destroy (job); + } + + return NULL; +} + +void +ev_job_scheduler_push_job (EvJob *job, + EvJobPriority priority) +{ + static GOnce once_init = G_ONCE_INIT; + EvSchedulerJob *s_job; + + g_once (&once_init, ev_job_scheduler_init, NULL); + + ev_debug_message (DEBUG_JOBS, "%s pirority %d", EV_GET_TYPE_NAME (job), priority); + + s_job = g_new0 (EvSchedulerJob, 1); + s_job->job = g_object_ref (job); + s_job->priority = priority; + + ev_scheduler_job_list_add (s_job); + + switch (ev_job_get_run_mode (job)) { + case EV_JOB_RUN_THREAD: + g_signal_connect_swapped (job->cancellable, "cancelled", + G_CALLBACK (ev_scheduler_thread_job_cancelled), + s_job); + ev_job_queue_push (s_job, priority); + break; + case EV_JOB_RUN_MAIN_LOOP: + g_signal_connect_swapped (job, "finished", + G_CALLBACK (ev_scheduler_job_destroy), + s_job); + g_signal_connect_swapped (job, "cancelled", + G_CALLBACK (ev_scheduler_job_destroy), + s_job); + g_idle_add_full (G_PRIORITY_DEFAULT_IDLE, + (GSourceFunc)ev_job_idle, + g_object_ref (job), + (GDestroyNotify)g_object_unref); + break; + default: + g_assert_not_reached (); + } +} + +void +ev_job_scheduler_update_job (EvJob *job, + EvJobPriority priority) +{ + GSList *l; + EvSchedulerJob *s_job = NULL; + gboolean need_resort = FALSE; + + /* Main loop jobs are scheduled inmediately */ + if (ev_job_get_run_mode (job) == EV_JOB_RUN_MAIN_LOOP) + return; + + ev_debug_message (DEBUG_JOBS, "%s pirority %d", EV_GET_TYPE_NAME (job), priority); + + G_LOCK (job_list); + + for (l = job_list; l; l = l->next) { + s_job = (EvSchedulerJob *)l->data; + + if (s_job->job == job) { + need_resort = (s_job->priority != priority); + break; + } + } + + G_UNLOCK (job_list); + + if (need_resort) { + GList *list; + + g_mutex_lock (job_queue_mutex); + + list = g_queue_find (job_queue[s_job->priority], s_job); + if (list) { + ev_debug_message (DEBUG_JOBS, "Moving job %s from pirority %d to %d", + EV_GET_TYPE_NAME (job), s_job->priority, priority); + g_queue_delete_link (job_queue[s_job->priority], list); + g_queue_push_tail (job_queue[priority], s_job); + g_cond_broadcast (job_queue_cond); + } + + g_mutex_unlock (job_queue_mutex); + } +} + -- cgit v0.9.1