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DEFINITIONS
This source file includes following definitions.
- de265_sync_sub_and_fetch
- de265_sync_add_and_fetch
/*
* H.265 video codec.
* Copyright (c) 2013-2014 struktur AG, Dirk Farin <farin@struktur.de>
*
* This file is part of libde265.
*
* libde265 is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* libde265 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libde265. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DE265_THREADS_H
#define DE265_THREADS_H
#include "libde265/de265.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_STDBOOL_H
#include <stdbool.h>
#endif
#include <deque>
#ifndef _WIN32
#include <pthread.h>
typedef pthread_t de265_thread;
typedef pthread_mutex_t de265_mutex;
typedef pthread_cond_t de265_cond;
#else // _WIN32
#include <windows.h>
#include "../extra/win32cond.h"
#include <intrin.h>
typedef HANDLE de265_thread;
typedef HANDLE de265_mutex;
typedef win32_cond_t de265_cond;
#endif // _WIN32
#ifndef _WIN32
int de265_thread_create(de265_thread* t, void *(*start_routine) (void *), void *arg);
#else
int de265_thread_create(de265_thread* t, LPTHREAD_START_ROUTINE start_routine, void *arg);
#endif
void de265_thread_join(de265_thread t);
void de265_thread_destroy(de265_thread* t);
void de265_mutex_init(de265_mutex* m);
void de265_mutex_destroy(de265_mutex* m);
void de265_mutex_lock(de265_mutex* m);
void de265_mutex_unlock(de265_mutex* m);
void de265_cond_init(de265_cond* c);
void de265_cond_destroy(de265_cond* c);
void de265_cond_broadcast(de265_cond* c, de265_mutex* m);
void de265_cond_wait(de265_cond* c,de265_mutex* m);
void de265_cond_signal(de265_cond* c);
typedef volatile long de265_sync_int;
inline int de265_sync_sub_and_fetch(de265_sync_int* cnt, int n)
{
#ifdef _WIN64
return _InterlockedAdd(cnt, -n);
#elif _WIN32
return _InterlockedExchangeAdd(cnt, -n) - n;
#else
return __sync_sub_and_fetch(cnt, n);
#endif
}
inline int de265_sync_add_and_fetch(de265_sync_int* cnt, int n)
{
#ifdef _WIN64
return _InterlockedAdd(cnt, n);
#elif _WIN32
return _InterlockedExchangeAdd(cnt, n) + n;
#else
return __sync_add_and_fetch(cnt, n);
#endif
}
class de265_progress_lock
{
public:
de265_progress_lock();
~de265_progress_lock();
void wait_for_progress(int progress);
void set_progress(int progress);
int get_progress() const;
void reset(int value=0) { mProgress=value; }
private:
int mProgress;
// private data
de265_mutex mutex;
de265_cond cond;
};
class thread_task
{
public:
thread_task() : state(Queued) { }
virtual ~thread_task() { }
enum { Queued, Running, Blocked, Finished } state;
virtual void work() = 0;
};
#define MAX_THREADS 32
/* TODO NOTE: When unblocking a task, we have to check first
if there are threads waiting because of the run-count limit.
If there are higher-priority tasks, those should be run instead
of the just unblocked task.
*/
class thread_pool
{
public:
bool stopped;
std::deque<thread_task*> tasks; // we are not the owner
de265_thread thread[MAX_THREADS];
int num_threads;
int num_threads_working;
int ctbx[MAX_THREADS]; // the CTB the thread is working on
int ctby[MAX_THREADS];
de265_mutex mutex;
de265_cond cond_var;
};
de265_error start_thread_pool(thread_pool* pool, int num_threads);
void stop_thread_pool(thread_pool* pool); // do not process remaining tasks
void add_task(thread_pool* pool, thread_task* task); // TOCO: can make thread_task const
#endif