forked from bartvdbraak/blender
8103381ded
* Multithreaded image loading, each thread can load a separate image. * Better multithreading for multiple instanced meshes, different threads can now build BVH's for different meshes, rather than all cooperating on the same mesh. Especially noticeable for dynamic BVH building for the viewport, gave about 2x faster build on 8 core in fairly complex scene with many objects. * The main thread waiting for worker threads can now also work itself, so (num_cores + 1) threads will be working, this supposedly gives better performance on some operating systems, but did not measure performance for this very detailed yet.
127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
/*
|
|
* Copyright 2011, Blender Foundation.
|
|
*
|
|
* This program 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.
|
|
*
|
|
* This program 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.
|
|
*/
|
|
|
|
#ifndef __UTIL_TASK_H__
|
|
#define __UTIL_TASK_H__
|
|
|
|
#include "util_list.h"
|
|
#include "util_thread.h"
|
|
#include "util_vector.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
class Task;
|
|
class TaskPool;
|
|
class TaskScheduler;
|
|
|
|
typedef boost::function<void(void)> TaskRunFunction;
|
|
|
|
/* Task
|
|
*
|
|
* Base class for tasks to be executed in threads. */
|
|
|
|
class Task
|
|
{
|
|
public:
|
|
Task() {};
|
|
Task(const TaskRunFunction& run_) : run(run_) {}
|
|
|
|
virtual ~Task() {}
|
|
|
|
TaskRunFunction run;
|
|
};
|
|
|
|
/* Task Pool
|
|
*
|
|
* Pool of tasks that will be executed by the central TaskScheduler.For each
|
|
* pool, we can wait for all tasks to be done, or cancel them before they are
|
|
* done.
|
|
*
|
|
* The run callback that actually executes the task may be create like this:
|
|
* function_bind(&MyClass::task_execute, this, _1, _2) */
|
|
|
|
class TaskPool
|
|
{
|
|
public:
|
|
TaskPool();
|
|
~TaskPool();
|
|
|
|
void push(Task *task, bool front = false);
|
|
void push(const TaskRunFunction& run, bool front = false);
|
|
|
|
void wait_work(); /* work and wait until all tasks are done */
|
|
void cancel(); /* cancel all tasks, keep worker threads running */
|
|
void stop(); /* stop all worker threads */
|
|
|
|
bool cancelled(); /* for worker threads, test if cancelled */
|
|
|
|
protected:
|
|
friend class TaskScheduler;
|
|
|
|
void done_increase(int done);
|
|
|
|
thread_mutex done_mutex;
|
|
thread_condition_variable done_cond;
|
|
|
|
volatile int num, num_done;
|
|
volatile bool do_cancel;
|
|
};
|
|
|
|
/* Task Scheduler
|
|
*
|
|
* Central scheduler that holds running threads ready to execute tasks. A singe
|
|
* queue holds the task from all pools. */
|
|
|
|
class TaskScheduler
|
|
{
|
|
public:
|
|
static void init(int num_threads = 0);
|
|
static void exit();
|
|
|
|
static int num_threads() { return threads.size(); }
|
|
|
|
protected:
|
|
friend class TaskPool;
|
|
|
|
struct Entry {
|
|
Task *task;
|
|
TaskPool *pool;
|
|
};
|
|
|
|
static thread_mutex mutex;
|
|
static int users;
|
|
static vector<thread*> threads;
|
|
static vector<int> thread_level;
|
|
static volatile bool do_exit;
|
|
|
|
static list<Entry> queue;
|
|
static thread_mutex queue_mutex;
|
|
static thread_condition_variable queue_cond;
|
|
|
|
static void thread_run(int thread_id);
|
|
static bool thread_wait_pop(Entry& entry);
|
|
|
|
static void push(Entry& entry, bool front);
|
|
static void clear(TaskPool *pool);
|
|
};
|
|
|
|
CCL_NAMESPACE_END
|
|
|
|
#endif
|
|
|