mirror of
https://github.com/libretro/RetroArch.git
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828 lines
18 KiB
C
828 lines
18 KiB
C
/* Copyright (C) 2010-2016 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (task_queue.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <queues/task_queue.h>
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#ifdef HAVE_THREADS
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#include <rthreads/rthreads.h>
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#define SLOCK_LOCK(x) slock_lock(x)
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#define SLOCK_UNLOCK(x) slock_unlock(x)
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#else
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#define SLOCK_LOCK(x)
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#define SLOCK_UNLOCK(x)
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#endif
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typedef struct
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{
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retro_task_t *front;
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retro_task_t *back;
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} task_queue_t;
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struct retro_task_impl
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{
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retro_task_queue_msg_t msg_push;
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void (*push_running)(retro_task_t *);
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void (*cancel)(void *);
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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)(retro_task_finder_t, void*);
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void (*retrieve)(task_retriever_data_t *data);
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void (*init)(void);
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void (*deinit)(void);
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};
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static retro_task_queue_msg_t msg_push_bak;
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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 retro_task_impl *impl_current = NULL;
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static bool task_threaded_enable = false;
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static void task_queue_msg_push(retro_task_t *task,
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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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buf[0] = '\0';
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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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if (impl_current->msg_push)
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impl_current->msg_push(buf, prio, duration, flush);
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}
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static void task_queue_push_progress(retro_task_t *task)
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{
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if (task->title && !task->mute)
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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_queue_msg_push(task, 1, 60, true, "%s: %s",
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"Task failed", task->title);
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else
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task_queue_msg_push(task, 1, 60, false, "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_queue_msg_push(task, 1, 60, true, "%i%%: %s",
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task->progress, task->title);
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else
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task_queue_msg_push(task, 1, 60, false, "%s...", task->title);
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}
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}
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}
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static void task_queue_put(task_queue_t *queue, retro_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 retro_task_t *task_queue_get(task_queue_t *queue)
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{
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retro_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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static void retro_task_internal_gather(void)
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{
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retro_task_t *task = NULL;
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while ((task = task_queue_get(&tasks_finished)) != NULL)
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{
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task_queue_push_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->cleanup)
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task->cleanup(task);
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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 retro_task_regular_push_running(retro_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 retro_task_regular_cancel(void *task)
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{
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retro_task_t *t = (retro_task_t*)task;
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t->cancelled = true;
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}
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static void retro_task_regular_gather(void)
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{
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retro_task_t *task = NULL;
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retro_task_t *queue = NULL;
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retro_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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task_queue_push_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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retro_task_regular_push_running(task);
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}
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retro_task_internal_gather();
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}
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static void retro_task_regular_wait(void)
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{
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while (tasks_running.front)
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retro_task_regular_gather();
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}
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static void retro_task_regular_reset(void)
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{
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retro_task_t *task = tasks_running.front;
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for (; task; task = task->next)
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task->cancelled = true;
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}
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static void retro_task_regular_init(void)
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{
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}
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static void retro_task_regular_deinit(void)
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{
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}
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static bool retro_task_regular_find(retro_task_finder_t func, void *user_data)
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{
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retro_task_t *task = tasks_running.front;
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for (; 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 void retro_task_regular_retrieve(task_retriever_data_t *data)
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{
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retro_task_t *task = NULL;
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task_retriever_info_t *tail = NULL;
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/* Parse all running tasks and handle matching handlers */
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for (task = tasks_running.front; task != NULL; task = task->next)
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{
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task_retriever_info_t *info = NULL;
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if (task->handler != data->handler)
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continue;
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/* Create new link */
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info = (task_retriever_info_t*)malloc(sizeof(task_retriever_info_t));
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info->data = malloc(data->element_size);
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info->next = NULL;
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/* Call retriever function and fill info-specific data */
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if (!data->func(task, info->data))
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{
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free(info->data);
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free(info);
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continue;
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}
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/* Add link to list */
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if (data->list)
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{
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if (tail)
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{
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tail->next = info;
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tail = tail->next;
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}
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else
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tail = info;
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}
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else
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{
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data->list = info;
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tail = data->list;
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}
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}
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}
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static struct retro_task_impl impl_regular = {
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NULL,
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retro_task_regular_push_running,
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retro_task_regular_cancel,
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retro_task_regular_reset,
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retro_task_regular_wait,
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retro_task_regular_gather,
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retro_task_regular_find,
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retro_task_regular_retrieve,
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retro_task_regular_init,
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retro_task_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 slock_t *property_lock = NULL;
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static slock_t *queue_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 task_queue_remove(task_queue_t *queue, retro_task_t *task)
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{
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retro_task_t *t = NULL;
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retro_task_t *front = NULL;
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slock_lock(queue_lock);
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front = queue->front;
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slock_unlock(queue_lock);
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/* Remove first element if needed */
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if (task == front)
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{
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slock_lock(queue_lock);
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queue->front = task->next;
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slock_unlock(queue_lock);
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task->next = NULL;
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return;
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}
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/* Parse queue */
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t = front;
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while (t && t->next)
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{
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/* Remove task and update queue */
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if (t->next == task)
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{
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t->next = task->next;
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task->next = NULL;
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break;
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}
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/* Update iterator */
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t = t->next;
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}
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}
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static void retro_task_threaded_push_running(retro_task_t *task)
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{
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slock_lock(running_lock);
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slock_lock(queue_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(queue_lock);
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slock_unlock(running_lock);
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}
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static void retro_task_threaded_cancel(void *task)
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{
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retro_task_t *t;
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slock_lock(running_lock);
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for (t = tasks_running.front; t; t = t->next)
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{
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if (t == task)
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{
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t->cancelled = true;
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break;
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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 void retro_task_threaded_gather(void)
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{
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retro_task_t *task = NULL;
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slock_lock(property_lock);
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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_queue_push_progress(task);
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slock_unlock(running_lock);
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slock_lock(finished_lock);
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retro_task_internal_gather();
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slock_unlock(finished_lock);
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slock_unlock(property_lock);
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}
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static void retro_task_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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retro_task_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 retro_task_threaded_reset(void)
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{
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retro_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 bool retro_task_threaded_find(
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retro_task_finder_t func, void *user_data)
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{
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retro_task_t *task = NULL;
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bool result = false;
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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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{
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result = true;
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break;
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}
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}
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slock_unlock(running_lock);
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return result;
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}
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static void retro_task_threaded_retrieve(task_retriever_data_t *data)
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{
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/* Protect access to running tasks */
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slock_lock(running_lock);
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/* Call regular retrieve function */
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retro_task_regular_retrieve(data);
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/* Release access to running tasks */
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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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for (;;)
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{
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retro_task_t *task = NULL;
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bool finished = false;
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if (!worker_continue)
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break; /* should we keep running until all tasks finished? */
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slock_lock(running_lock);
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/* Get first task to run */
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task = tasks_running.front;
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if (task == NULL)
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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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task->handler(task);
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slock_lock(property_lock);
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finished = task->finished;
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slock_unlock(property_lock);
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slock_lock(running_lock);
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task_queue_remove(&tasks_running, task);
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slock_unlock(running_lock);
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/* Update queue */
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if (!finished)
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{
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/* Re-add task to running queue */
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retro_task_threaded_push_running(task);
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}
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else
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{
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/* Add task to finished queue */
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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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}
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}
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static void retro_task_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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property_lock = slock_new();
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queue_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 retro_task_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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slock_free(property_lock);
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slock_free(queue_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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property_lock = NULL;
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queue_lock = NULL;
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}
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static struct retro_task_impl impl_threaded = {
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NULL,
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retro_task_threaded_push_running,
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retro_task_threaded_cancel,
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retro_task_threaded_reset,
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retro_task_threaded_wait,
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retro_task_threaded_gather,
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retro_task_threaded_find,
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retro_task_threaded_retrieve,
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retro_task_threaded_init,
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retro_task_threaded_deinit
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};
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#endif
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/* Deinitializes the task system.
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* This deinitializes the task system.
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* The tasks that are running at
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* the moment will stay on hold */
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void task_queue_deinit(void)
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{
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if (impl_current)
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impl_current->deinit();
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impl_current = NULL;
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}
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void task_queue_init(bool threaded, retro_task_queue_msg_t msg_push)
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{
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impl_current = &impl_regular;
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#ifdef HAVE_THREADS
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if (threaded)
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{
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task_threaded_enable = true;
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impl_current = &impl_threaded;
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}
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#endif
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msg_push_bak = msg_push;
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impl_current->msg_push = msg_push;
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impl_current->init();
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}
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void task_queue_set_threaded(void)
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{
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task_threaded_enable = true;
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}
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void task_queue_unset_threaded(void)
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{
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task_threaded_enable = false;
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}
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bool task_queue_is_threaded(void)
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{
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return task_threaded_enable;
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}
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|
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bool task_queue_ctl(enum task_queue_ctl_state state, void *data)
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{
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switch (state)
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{
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case TASK_QUEUE_CTL_FIND:
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{
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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_QUEUE_CTL_RETRIEVE:
|
|
impl_current->retrieve((task_retriever_data_t*)data);
|
|
break;
|
|
case TASK_QUEUE_CTL_CHECK:
|
|
{
|
|
#ifdef HAVE_THREADS
|
|
bool current_threaded = (impl_current == &impl_threaded);
|
|
bool want_threaded = task_queue_is_threaded();
|
|
|
|
if (want_threaded != current_threaded)
|
|
task_queue_deinit();
|
|
|
|
if (!impl_current)
|
|
task_queue_init(want_threaded, msg_push_bak);
|
|
#endif
|
|
|
|
impl_current->gather();
|
|
}
|
|
break;
|
|
case TASK_QUEUE_CTL_PUSH:
|
|
{
|
|
retro_task_t *task = (retro_task_t*)data;
|
|
|
|
/* Ignore this task if a related one is already running */
|
|
if (task->type == TASK_TYPE_BLOCKING)
|
|
{
|
|
retro_task_t *running = NULL;
|
|
bool found = false;
|
|
|
|
SLOCK_LOCK(queue_lock);
|
|
running = tasks_running.front;
|
|
|
|
for (; running; running = running->next)
|
|
{
|
|
if (running->type == TASK_TYPE_BLOCKING)
|
|
{
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
SLOCK_UNLOCK(queue_lock);
|
|
|
|
/* skip this task, user must try again later */
|
|
if (found)
|
|
break;
|
|
}
|
|
|
|
/* The lack of NULL checks in the following functions
|
|
* is proposital to ensure correct control flow by the users. */
|
|
impl_current->push_running(task);
|
|
break;
|
|
}
|
|
case TASK_QUEUE_CTL_RESET:
|
|
impl_current->reset();
|
|
break;
|
|
case TASK_QUEUE_CTL_WAIT:
|
|
impl_current->wait();
|
|
break;
|
|
case TASK_QUEUE_CTL_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Signals a task to end without waiting for
|
|
* it to complete. */
|
|
void task_queue_cancel_task(void *task)
|
|
{
|
|
impl_current->cancel(task);
|
|
}
|
|
|
|
void *task_queue_retriever_info_next(task_retriever_info_t **link)
|
|
{
|
|
void *data = NULL;
|
|
|
|
/* Grab data and move to next link */
|
|
if (*link)
|
|
{
|
|
data = (*link)->data;
|
|
*link = (*link)->next;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
void task_queue_retriever_info_free(task_retriever_info_t *list)
|
|
{
|
|
task_retriever_info_t *info;
|
|
|
|
/* Free links including retriever-specific data */
|
|
while (list)
|
|
{
|
|
info = list->next;
|
|
free(list->data);
|
|
free(list);
|
|
list = info;
|
|
}
|
|
}
|
|
|
|
void task_set_finished(retro_task_t *task, bool finished)
|
|
{
|
|
SLOCK_LOCK(property_lock);
|
|
task->finished = finished;
|
|
SLOCK_UNLOCK(property_lock);
|
|
}
|
|
|
|
void task_set_mute(retro_task_t *task, bool mute)
|
|
{
|
|
SLOCK_LOCK(property_lock);
|
|
task->mute = mute;
|
|
SLOCK_UNLOCK(property_lock);
|
|
}
|
|
|
|
void task_set_error(retro_task_t *task, char *error)
|
|
{
|
|
SLOCK_LOCK(property_lock);
|
|
task->error = error;
|
|
SLOCK_UNLOCK(property_lock);
|
|
}
|
|
|
|
void task_set_progress(retro_task_t *task, int8_t progress)
|
|
{
|
|
SLOCK_LOCK(property_lock);
|
|
task->progress = progress;
|
|
SLOCK_UNLOCK(property_lock);
|
|
}
|
|
|
|
void task_set_title(retro_task_t *task, char *title)
|
|
{
|
|
SLOCK_LOCK(property_lock);
|
|
task->title = title;
|
|
SLOCK_UNLOCK(property_lock);
|
|
}
|
|
|
|
void task_set_data(retro_task_t *task, void *data)
|
|
{
|
|
SLOCK_LOCK(running_lock);
|
|
task->task_data = data;
|
|
SLOCK_UNLOCK(running_lock);
|
|
}
|
|
|
|
void task_set_cancelled(retro_task_t *task, bool cancelled)
|
|
{
|
|
SLOCK_LOCK(running_lock);
|
|
task->cancelled = cancelled;
|
|
SLOCK_UNLOCK(running_lock);
|
|
}
|
|
|
|
void task_free_title(retro_task_t *task)
|
|
{
|
|
SLOCK_LOCK(property_lock);
|
|
if (task->title)
|
|
free(task->title);
|
|
task->title = NULL;
|
|
SLOCK_UNLOCK(property_lock);
|
|
}
|
|
|
|
void* task_get_data(retro_task_t *task)
|
|
{
|
|
void *data = NULL;
|
|
|
|
SLOCK_LOCK(running_lock);
|
|
data = task->task_data;
|
|
SLOCK_UNLOCK(running_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
bool task_get_cancelled(retro_task_t *task)
|
|
{
|
|
bool cancelled = false;
|
|
|
|
SLOCK_LOCK(running_lock);
|
|
cancelled = task->cancelled;
|
|
SLOCK_UNLOCK(running_lock);
|
|
|
|
return cancelled;
|
|
}
|
|
|
|
bool task_get_finished(retro_task_t *task)
|
|
{
|
|
bool finished = false;
|
|
|
|
SLOCK_LOCK(property_lock);
|
|
finished = task->finished;
|
|
SLOCK_UNLOCK(property_lock);
|
|
|
|
return finished;
|
|
}
|
|
|
|
bool task_get_mute(retro_task_t *task)
|
|
{
|
|
bool mute = false;
|
|
|
|
SLOCK_LOCK(property_lock);
|
|
mute = task->mute;
|
|
SLOCK_UNLOCK(property_lock);
|
|
|
|
return mute;
|
|
}
|
|
|
|
char* task_get_error(retro_task_t *task)
|
|
{
|
|
char *error = NULL;
|
|
|
|
SLOCK_LOCK(property_lock);
|
|
error = task->error;
|
|
SLOCK_UNLOCK(property_lock);
|
|
|
|
return error;
|
|
}
|
|
|
|
int8_t task_get_progress(retro_task_t *task)
|
|
{
|
|
int8_t progress = 0;
|
|
|
|
SLOCK_LOCK(property_lock);
|
|
progress = task->progress;
|
|
SLOCK_UNLOCK(property_lock);
|
|
|
|
return progress;
|
|
}
|
|
|
|
char* task_get_title(retro_task_t *task)
|
|
{
|
|
char *title = NULL;
|
|
|
|
SLOCK_LOCK(property_lock);
|
|
title = task->title;
|
|
SLOCK_UNLOCK(property_lock);
|
|
|
|
return title;
|
|
}
|