mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-29 14:13:19 +00:00
415 lines
9.4 KiB
C
415 lines
9.4 KiB
C
/* RetroArch - A frontend for libretro.
|
|
* Copyright (C) 2011-2016 - Higor Euripedes
|
|
* Copyright (C) 2011-2016 - Daniel De Matteis
|
|
*
|
|
* RetroArch 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 Found-
|
|
* ation, either version 3 of the License, or (at your option) any later version.
|
|
*
|
|
* RetroArch 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 RetroArch.
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "task_queue.h"
|
|
|
|
#ifdef HAVE_THREADS
|
|
#include <rthreads/rthreads.h>
|
|
#endif
|
|
|
|
typedef struct
|
|
{
|
|
retro_task_t *front;
|
|
retro_task_t *back;
|
|
} task_queue_t;
|
|
|
|
struct retro_task_impl
|
|
{
|
|
void (*push_running)(retro_task_t *);
|
|
void (*reset)(void);
|
|
void (*wait)(void);
|
|
void (*gather)(void);
|
|
bool (*find)(retro_task_finder_t, void*);
|
|
void (*init)(void);
|
|
void (*deinit)(void);
|
|
};
|
|
|
|
static task_queue_t tasks_running = {NULL, NULL};
|
|
static task_queue_t tasks_finished = {NULL, NULL};
|
|
|
|
static void task_queue_put(task_queue_t *queue, retro_task_t *task)
|
|
{
|
|
task->next = NULL;
|
|
|
|
if (queue->front)
|
|
queue->back->next = task;
|
|
else
|
|
queue->front = task;
|
|
|
|
queue->back = task;
|
|
}
|
|
|
|
static retro_task_t *task_queue_get(task_queue_t *queue)
|
|
{
|
|
retro_task_t *task = queue->front;
|
|
|
|
if (task)
|
|
{
|
|
queue->front = task->next;
|
|
task->next = NULL;
|
|
}
|
|
|
|
return task;
|
|
}
|
|
|
|
static void retro_task_internal_gather(void)
|
|
{
|
|
retro_task_t *task = NULL;
|
|
while ((task = task_queue_get(&tasks_finished)) != NULL)
|
|
{
|
|
task_queue_push_progress(task);
|
|
|
|
if (task->callback)
|
|
task->callback(task->task_data, task->user_data, task->error);
|
|
|
|
if (task->error)
|
|
free(task->error);
|
|
|
|
if (task->title)
|
|
free(task->title);
|
|
|
|
free(task);
|
|
}
|
|
}
|
|
|
|
static void retro_task_regular_push_running(retro_task_t *task)
|
|
{
|
|
task_queue_put(&tasks_running, task);
|
|
}
|
|
|
|
static void retro_task_regular_gather(void)
|
|
{
|
|
retro_task_t *task = NULL;
|
|
retro_task_t *queue = NULL;
|
|
retro_task_t *next = NULL;
|
|
|
|
while ((task = task_queue_get(&tasks_running)) != NULL)
|
|
{
|
|
task->next = queue;
|
|
queue = task;
|
|
}
|
|
|
|
for (task = queue; task; task = next)
|
|
{
|
|
next = task->next;
|
|
task->handler(task);
|
|
|
|
task_queue_push_progress(task);
|
|
|
|
if (task->finished)
|
|
task_queue_put(&tasks_finished, task);
|
|
else
|
|
retro_task_regular_push_running(task);
|
|
}
|
|
|
|
retro_task_internal_gather();
|
|
}
|
|
|
|
static void retro_task_regular_wait(void)
|
|
{
|
|
while (tasks_running.front)
|
|
retro_task_regular_gather();
|
|
}
|
|
|
|
static void retro_task_regular_reset(void)
|
|
{
|
|
retro_task_t *task = tasks_running.front;
|
|
|
|
for (; task; task = task->next)
|
|
task->cancelled = true;
|
|
}
|
|
|
|
static void retro_task_regular_init(void)
|
|
{
|
|
}
|
|
|
|
static void retro_task_regular_deinit(void)
|
|
{
|
|
}
|
|
|
|
static bool retro_task_regular_find(retro_task_finder_t func, void *user_data)
|
|
{
|
|
retro_task_t *task = tasks_running.front;
|
|
|
|
for (; task; task = task->next)
|
|
{
|
|
if (func(task, user_data))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static struct retro_task_impl impl_regular = {
|
|
retro_task_regular_push_running,
|
|
retro_task_regular_reset,
|
|
retro_task_regular_wait,
|
|
retro_task_regular_gather,
|
|
retro_task_regular_find,
|
|
retro_task_regular_init,
|
|
retro_task_regular_deinit
|
|
};
|
|
|
|
#ifdef HAVE_THREADS
|
|
static slock_t *running_lock = NULL;
|
|
static slock_t *finished_lock = NULL;
|
|
static scond_t *worker_cond = NULL;
|
|
static sthread_t *worker_thread = NULL;
|
|
static bool worker_continue = true; /* use running_lock when touching it */
|
|
|
|
static void retro_task_threaded_push_running(retro_task_t *task)
|
|
{
|
|
slock_lock(running_lock);
|
|
task_queue_put(&tasks_running, task);
|
|
scond_signal(worker_cond);
|
|
slock_unlock(running_lock);
|
|
}
|
|
|
|
static void retro_task_threaded_gather(void)
|
|
{
|
|
retro_task_t *task = NULL;
|
|
|
|
slock_lock(running_lock);
|
|
for (task = tasks_running.front; task; task = task->next)
|
|
task_queue_push_progress(task);
|
|
|
|
slock_unlock(running_lock);
|
|
|
|
slock_lock(finished_lock);
|
|
retro_task_internal_gather();
|
|
slock_unlock(finished_lock);
|
|
}
|
|
|
|
static void retro_task_threaded_wait(void)
|
|
{
|
|
bool wait = false;
|
|
|
|
do
|
|
{
|
|
retro_task_threaded_gather();
|
|
|
|
slock_lock(running_lock);
|
|
wait = (tasks_running.front != NULL);
|
|
slock_unlock(running_lock);
|
|
} while (wait);
|
|
}
|
|
|
|
static void retro_task_threaded_reset(void)
|
|
{
|
|
retro_task_t *task = NULL;
|
|
|
|
slock_lock(running_lock);
|
|
for (task = tasks_running.front; task; task = task->next)
|
|
task->cancelled = true;
|
|
slock_unlock(running_lock);
|
|
}
|
|
|
|
|
|
static bool retro_task_threaded_find(
|
|
retro_task_finder_t func, void *user_data)
|
|
{
|
|
retro_task_t *task = NULL;
|
|
|
|
slock_lock(running_lock);
|
|
for (task = tasks_running.front; task; task = task->next)
|
|
{
|
|
if (func(task, user_data))
|
|
return true;
|
|
}
|
|
slock_unlock(running_lock);
|
|
|
|
return false;
|
|
}
|
|
|
|
static void threaded_worker(void *userdata)
|
|
{
|
|
(void)userdata;
|
|
|
|
for (;;)
|
|
{
|
|
retro_task_t *queue = NULL;
|
|
retro_task_t *task = NULL;
|
|
retro_task_t *next = NULL;
|
|
|
|
/* pop all into a local queue,
|
|
* tasks are in the reverse order here. */
|
|
slock_lock(running_lock);
|
|
|
|
if (!worker_continue)
|
|
break; /* should we keep running until all tasks finished? */
|
|
|
|
while ((task = task_queue_get(&tasks_running)) != NULL)
|
|
{
|
|
task->next = queue;
|
|
queue = task;
|
|
}
|
|
|
|
if (queue == NULL) /* no tasks running, lets wait a bit */
|
|
{
|
|
scond_wait(worker_cond, running_lock);
|
|
slock_unlock(running_lock);
|
|
continue;
|
|
}
|
|
|
|
slock_unlock(running_lock);
|
|
|
|
for (task = queue; task; task = next)
|
|
{
|
|
next = task->next;
|
|
task->handler(task);
|
|
|
|
if (task->finished)
|
|
{
|
|
slock_lock(finished_lock);
|
|
task_queue_put(&tasks_finished, task);
|
|
slock_unlock(finished_lock);
|
|
}
|
|
else
|
|
retro_task_threaded_push_running(task);
|
|
}
|
|
}
|
|
|
|
slock_unlock(running_lock);
|
|
}
|
|
|
|
static void retro_task_threaded_init(void)
|
|
{
|
|
running_lock = slock_new();
|
|
finished_lock = slock_new();
|
|
worker_cond = scond_new();
|
|
|
|
slock_lock(running_lock);
|
|
worker_continue = true;
|
|
slock_unlock(running_lock);
|
|
|
|
worker_thread = sthread_create(threaded_worker, NULL);
|
|
}
|
|
|
|
static void retro_task_threaded_deinit(void)
|
|
{
|
|
slock_lock(running_lock);
|
|
worker_continue = false;
|
|
scond_signal(worker_cond);
|
|
slock_unlock(running_lock);
|
|
|
|
sthread_join(worker_thread);
|
|
|
|
scond_free(worker_cond);
|
|
slock_free(running_lock);
|
|
slock_free(finished_lock);
|
|
|
|
worker_thread = NULL;
|
|
worker_cond = NULL;
|
|
running_lock = NULL;
|
|
finished_lock = NULL;
|
|
}
|
|
|
|
static struct retro_task_impl impl_threaded = {
|
|
retro_task_threaded_push_running,
|
|
retro_task_threaded_reset,
|
|
retro_task_threaded_wait,
|
|
retro_task_threaded_gather,
|
|
retro_task_threaded_find,
|
|
retro_task_threaded_init,
|
|
retro_task_threaded_deinit
|
|
};
|
|
#endif
|
|
|
|
bool task_queue_ctl(enum task_queue_ctl_state state, void *data)
|
|
{
|
|
static struct retro_task_impl *impl_current = NULL;
|
|
static bool task_threaded_enable = false;
|
|
|
|
switch (state)
|
|
{
|
|
case TASK_CTL_DEINIT:
|
|
if (impl_current)
|
|
impl_current->deinit();
|
|
impl_current = NULL;
|
|
break;
|
|
case TASK_CTL_SET_THREADED:
|
|
task_threaded_enable = true;
|
|
break;
|
|
case TASK_CTL_UNSET_THREADED:
|
|
task_threaded_enable = false;
|
|
break;
|
|
case TASK_CTL_IS_THREADED:
|
|
return task_threaded_enable;
|
|
case TASK_CTL_INIT:
|
|
{
|
|
bool *boolean_val = (bool*)data;
|
|
|
|
impl_current = &impl_regular;
|
|
#ifdef HAVE_THREADS
|
|
if (*boolean_val)
|
|
{
|
|
task_queue_ctl(TASK_CTL_SET_THREADED, NULL);
|
|
impl_current = &impl_threaded;
|
|
}
|
|
#endif
|
|
|
|
impl_current->init();
|
|
}
|
|
break;
|
|
case TASK_CTL_FIND:
|
|
{
|
|
task_finder_data_t *find_data = (task_finder_data_t*)data;
|
|
if (!impl_current->find(find_data->func, find_data->userdata))
|
|
return false;
|
|
}
|
|
break;
|
|
case TASK_CTL_CHECK:
|
|
{
|
|
#ifdef HAVE_THREADS
|
|
bool current_threaded = (impl_current == &impl_threaded);
|
|
bool want_threaded = task_queue_ctl(TASK_CTL_IS_THREADED, NULL);
|
|
|
|
if (want_threaded != current_threaded)
|
|
task_queue_ctl(TASK_CTL_DEINIT, NULL);
|
|
|
|
if (!impl_current)
|
|
task_queue_ctl(TASK_CTL_INIT, NULL);
|
|
#endif
|
|
|
|
impl_current->gather();
|
|
}
|
|
break;
|
|
case TASK_CTL_PUSH:
|
|
{
|
|
/* The lack of NULL checks in the following functions
|
|
* is proposital to ensure correct control flow by the users. */
|
|
retro_task_t *task = (retro_task_t*)data;
|
|
impl_current->push_running(task);
|
|
break;
|
|
}
|
|
case TASK_CTL_RESET:
|
|
impl_current->reset();
|
|
break;
|
|
case TASK_CTL_WAIT:
|
|
impl_current->wait();
|
|
break;
|
|
case TASK_CTL_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|