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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __UTIL_THREAD_H__
#define __UTIL_THREAD_H__
#if (__cplusplus > 199711L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
# include <thread>
# include <mutex>
# include <condition_variable>
# include <functional>
#else
# include <boost/thread.hpp>
#endif
#include <pthread.h>
#include <queue>
#ifdef __APPLE__
# include <libkern/OSAtomic.h>
#endif
#include "util_function.h"
CCL_NAMESPACE_BEGIN
#if (__cplusplus > 199711L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
typedef std::mutex thread_mutex;
typedef std::unique_lock<std::mutex> thread_scoped_lock;
typedef std::condition_variable thread_condition_variable;
#else
/* use boost for mutexes */
typedef boost::mutex thread_mutex;
typedef boost::mutex::scoped_lock thread_scoped_lock;
typedef boost::condition_variable thread_condition_variable;
#endif
/* own pthread based implementation, to avoid boost version conflicts with
* dynamically loaded blender plugins */
class thread {
public:
thread(function<void(void)> run_cb_)
{
joined = false;
run_cb = run_cb_;
pthread_create(&pthread_id, NULL, run, (void*)this);
}
~thread()
{
if(!joined)
join();
}
static void *run(void *arg)
{
((thread*)arg)->run_cb();
return NULL;
}
bool join()
{
joined = true;
return pthread_join(pthread_id, NULL) == 0;
}
protected:
function<void(void)> run_cb;
pthread_t pthread_id;
bool joined;
};
/* Own wrapper around pthread's spin lock to make it's use easier. */
class thread_spin_lock {
public:
#ifdef __APPLE__
inline thread_spin_lock() {
spin_ = OS_SPINLOCK_INIT;
}
inline void lock() {
OSSpinLockLock(&spin_);
}
inline void unlock() {
OSSpinLockUnlock(&spin_);
}
#else /* __APPLE__ */
inline thread_spin_lock() {
pthread_spin_init(&spin_, 0);
}
inline ~thread_spin_lock() {
pthread_spin_destroy(&spin_);
}
inline void lock() {
pthread_spin_lock(&spin_);
}
inline void unlock() {
pthread_spin_unlock(&spin_);
}
#endif /* __APPLE__ */
protected:
#ifdef __APPLE__
OSSpinLock spin_;
#else
pthread_spinlock_t spin_;
#endif
};
CCL_NAMESPACE_END
#endif /* __UTIL_THREAD_H__ */
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