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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#ifndef __UTIL_THREAD_H__
#define __UTIL_THREAD_H__
#include <condition_variable>
#include <functional>
#include <mutex>
#include <queue>
#include <thread>
#ifdef _WIN32
# include "util/windows.h"
#else
# include <pthread.h>
#endif
/* NOTE: Use tbb/spin_mutex.h instead of util_tbb.h because some of the TBB
* functionality requires RTTI, which is disabled for OSL kernel. */
#include <tbb/spin_mutex.h>
#include "util/function.h"
CCL_NAMESPACE_BEGIN
typedef std::mutex thread_mutex;
typedef std::unique_lock<std::mutex> thread_scoped_lock;
typedef std::condition_variable thread_condition_variable;
/* Own thread implementation similar to std::thread, so we can set a
* custom stack size on macOS. */
class thread {
public:
thread(function<void()> run_cb);
~thread();
static void *run(void *arg);
bool join();
protected:
function<void()> run_cb_;
#ifdef __APPLE__
pthread_t pthread_id;
#else
std::thread std_thread;
#endif
bool joined_;
};
using thread_spin_lock = tbb::spin_mutex;
class thread_scoped_spin_lock {
public:
explicit thread_scoped_spin_lock(thread_spin_lock &lock) : lock_(lock)
{
lock_.lock();
}
~thread_scoped_spin_lock()
{
lock_.unlock();
}
/* TODO(sergey): Implement manual control over lock/unlock. */
protected:
thread_spin_lock &lock_;
};
CCL_NAMESPACE_END
#endif /* __UTIL_THREAD_H__ */
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