mirror of
https://github.com/libretro/RetroArch.git
synced 2024-12-03 22:03:04 +00:00
442 lines
9.7 KiB
C
442 lines
9.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2011-2016 - Daniel De Matteis
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <stdarg.h>
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#include "../general.h"
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#include "../verbosity.h"
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#include "../msg_hash.h"
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#include "tasks.h"
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#ifdef HAVE_THREADS
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#include "rthreads/rthreads.h"
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#endif
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typedef struct
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{
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rarch_task_t *front;
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rarch_task_t *back;
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} task_queue_t;
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struct rarch_task_impl
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{
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void (*push_running)(rarch_task_t *);
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void (*reset)(void);
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void (*wait)(void);
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void (*gather)(void);
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bool (*find)(rarch_task_finder_t, void*);
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void (*init)(void);
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void (*deinit)(void);
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};
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static task_queue_t tasks_running = {NULL, NULL};
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static task_queue_t tasks_finished = {NULL, NULL};
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static struct rarch_task_impl *impl_current = NULL;
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static void task_queue_put(task_queue_t *queue, rarch_task_t *task)
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{
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task->next = NULL;
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if (queue->front)
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queue->back->next = task;
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else
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queue->front = task;
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queue->back = task;
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}
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static rarch_task_t *task_queue_get(task_queue_t *queue)
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{
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rarch_task_t *task = queue->front;
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if (task)
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{
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queue->front = task->next;
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task->next = NULL;
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}
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return task;
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}
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void task_msg_queue_pushf(unsigned prio, unsigned duration,
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bool flush, const char *fmt, ...)
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{
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char buf[1024];
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(buf, sizeof(buf), fmt, ap);
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va_end(ap);
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runloop_msg_queue_push(buf, prio, duration, flush);
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}
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static void push_task_progress(rarch_task_t *task)
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{
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if (task->title)
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{
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if (task->finished)
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{
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if (task->error)
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task_msg_queue_pushf(1, 60, true, "%s: %s",
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msg_hash_to_str(MSG_TASK_FAILED), task->title);
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else
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task_msg_queue_pushf(1, 60, true, "100%%: %s", task->title);
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}
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else
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{
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if (task->progress >= 0 && task->progress <= 100)
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task_msg_queue_pushf(1, 60, true, "%i%%: %s", task->progress, task->title);
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else
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task_msg_queue_pushf(1, 60, true, "%s...", task->title);
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}
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}
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}
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static void rarch_task_internal_gather(void)
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{
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rarch_task_t *task;
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while ((task = task_queue_get(&tasks_finished)) != NULL)
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{
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push_task_progress(task);
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if (task->callback)
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task->callback(task->task_data, task->user_data, task->error);
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if (task->error)
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free(task->error);
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if (task->title)
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free(task->title);
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free(task);
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}
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}
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static void regular_push_running(rarch_task_t *task)
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{
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task_queue_put(&tasks_running, task);
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}
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static void regular_gather(void)
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{
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rarch_task_t *task = NULL;
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rarch_task_t *queue = NULL;
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rarch_task_t *next = NULL;
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while ((task = task_queue_get(&tasks_running)) != NULL)
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{
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task->next = queue;
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queue = task;
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}
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for (task = queue; task; task = next)
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{
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next = task->next;
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task->handler(task);
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push_task_progress(task);
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if (task->finished)
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task_queue_put(&tasks_finished, task);
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else
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regular_push_running(task);
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}
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rarch_task_internal_gather();
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}
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static void regular_wait(void)
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{
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while (tasks_running.front)
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regular_gather();
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}
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static void regular_reset(void)
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{
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rarch_task_t *task = NULL;
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for (task = tasks_running.front; task; task = task->next)
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task->cancelled = true;
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}
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static void regular_init(void)
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{
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}
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static void regular_deinit(void)
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{
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}
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static bool regular_find(rarch_task_finder_t func, void *user_data)
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{
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rarch_task_t *task = NULL;
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for (task = tasks_running.front; task; task = task->next)
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{
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if (func(task, user_data))
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return true;
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}
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return false;
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}
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static struct rarch_task_impl impl_regular = {
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regular_push_running,
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regular_reset,
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regular_wait,
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regular_gather,
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regular_find,
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regular_init,
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regular_deinit
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};
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#ifdef HAVE_THREADS
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static slock_t *running_lock = NULL;
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static slock_t *finished_lock = NULL;
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static scond_t *worker_cond = NULL;
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static sthread_t *worker_thread = NULL;
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static bool worker_continue = true; /* use running_lock when touching it */
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static void threaded_push_running(rarch_task_t *task)
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{
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slock_lock(running_lock);
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task_queue_put(&tasks_running, task);
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scond_signal(worker_cond);
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slock_unlock(running_lock);
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}
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static void threaded_gather(void)
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{
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rarch_task_t *task = NULL;
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slock_lock(running_lock);
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for (task = tasks_running.front; task; task = task->next)
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push_task_progress(task);
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slock_unlock(running_lock);
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slock_lock(finished_lock);
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rarch_task_internal_gather();
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slock_unlock(finished_lock);
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}
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static void threaded_wait(void)
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{
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bool wait = false;
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do
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{
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threaded_gather();
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slock_lock(running_lock);
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wait = (tasks_running.front != NULL);
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slock_unlock(running_lock);
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} while (wait);
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}
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static void threaded_reset(void)
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{
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rarch_task_t *task = NULL;
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slock_lock(running_lock);
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for (task = tasks_running.front; task; task = task->next)
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task->cancelled = true;
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slock_unlock(running_lock);
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}
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static void threaded_worker(void *userdata)
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{
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(void)userdata;
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RARCH_LOG("Threaded rarch_task started\n");
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for (;;)
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{
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rarch_task_t *queue = NULL;
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rarch_task_t *task = NULL;
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rarch_task_t *next = NULL;
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/* pop all into a local queue to avoid trouble with rarch_task_push(),
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* tasks are in the reverse order here. */
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slock_lock(running_lock);
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if (!worker_continue)
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break; /* should we keep running until all tasks finished? */
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while ((task = task_queue_get(&tasks_running)) != NULL)
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{
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task->next = queue;
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queue = task;
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}
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if (queue == NULL) /* no tasks running, lets wait a bit */
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{
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scond_wait(worker_cond, running_lock);
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slock_unlock(running_lock);
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continue;
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}
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slock_unlock(running_lock);
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for (task = queue; task; task = next)
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{
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next = task->next;
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task->handler(task);
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if (task->finished)
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{
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slock_lock(finished_lock);
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task_queue_put(&tasks_finished, task);
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slock_unlock(finished_lock);
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}
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else
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threaded_push_running(task);
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}
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}
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slock_unlock(running_lock);
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}
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static bool threaded_find(rarch_task_finder_t func, void *user_data)
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{
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rarch_task_t *task = NULL;
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slock_lock(running_lock);
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for (task = tasks_running.front; task; task = task->next)
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{
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if (func(task, user_data))
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return true;
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}
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slock_unlock(running_lock);
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return false;
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}
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static void threaded_init(void)
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{
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running_lock = slock_new();
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finished_lock = slock_new();
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worker_cond = scond_new();
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slock_lock(running_lock);
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worker_continue = true;
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slock_unlock(running_lock);
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worker_thread = sthread_create(threaded_worker, NULL);
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}
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static void threaded_deinit(void)
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{
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slock_lock(running_lock);
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worker_continue = false;
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scond_signal(worker_cond);
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slock_unlock(running_lock);
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sthread_join(worker_thread);
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scond_free(worker_cond);
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slock_free(running_lock);
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slock_free(finished_lock);
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worker_thread = NULL;
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worker_cond = NULL;
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running_lock = NULL;
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finished_lock = NULL;
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}
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static struct rarch_task_impl impl_threaded = {
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threaded_push_running,
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threaded_reset,
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threaded_wait,
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threaded_gather,
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threaded_find,
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threaded_init,
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threaded_deinit
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};
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#endif
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bool rarch_task_find(rarch_task_finder_t func, void *user_data)
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{
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return impl_current->find(func, user_data);
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}
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bool task_ctl(enum task_ctl_state state, void *data)
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{
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#ifdef HAVE_THREADS
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settings_t *settings = config_get_ptr();
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#endif
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switch (state)
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{
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case TASK_CTL_DEINIT:
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if (!impl_current)
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return false;
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impl_current->deinit();
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impl_current = NULL;
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break;
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case TASK_CTL_INIT:
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#ifdef HAVE_THREADS
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if (settings->threaded_data_runloop_enable)
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impl_current = &impl_threaded;
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else
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#endif
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impl_current = &impl_regular;
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impl_current->init();
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break;
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case TASK_CTL_CHECK:
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{
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#ifdef HAVE_THREADS
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bool current_threaded = (impl_current == &impl_threaded);
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bool want_threaded = settings->threaded_data_runloop_enable;
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if (want_threaded != current_threaded)
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{
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RARCH_LOG("Switching rarch_task implementation.\n");
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task_ctl(TASK_CTL_DEINIT, NULL);
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}
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if (impl_current == NULL)
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task_ctl(TASK_CTL_INIT, NULL);
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#endif
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impl_current->gather();
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}
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break;
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case TASK_CTL_PUSH:
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{
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/* The lack of NULL checks in the following functions is proposital
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* to ensure correct control flow by the users. */
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rarch_task_t *task = (rarch_task_t*)data;
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impl_current->push_running(task);
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break;
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}
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case TASK_CTL_RESET:
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impl_current->reset();
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break;
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case TASK_CTL_WAIT:
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impl_current->wait();
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break;
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case TASK_CTL_NONE:
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default:
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break;
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}
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return true;
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}
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