2014-12-17 05:38:14 +00:00
|
|
|
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
|
|
|
|
// Licensed under GPLv2 or any later version
|
2013-09-05 01:17:46 +01:00
|
|
|
// Refer to the license.txt file included.
|
|
|
|
|
2014-08-17 18:45:50 +01:00
|
|
|
#pragma once
|
2013-09-05 01:17:46 +01:00
|
|
|
|
2014-09-03 06:05:45 +01:00
|
|
|
#include <condition_variable>
|
2016-09-18 01:38:01 +01:00
|
|
|
#include <cstddef>
|
2014-09-03 06:05:45 +01:00
|
|
|
#include <mutex>
|
2016-09-18 01:38:01 +01:00
|
|
|
#include <thread>
|
2013-09-05 01:17:46 +01:00
|
|
|
|
2015-06-20 22:45:15 +01:00
|
|
|
#include "common/common_types.h"
|
2013-09-05 01:17:46 +01:00
|
|
|
|
2015-02-05 16:53:25 +00:00
|
|
|
// Support for C++11's thread_local keyword was surprisingly spotty in compilers until very
|
|
|
|
// recently. Fortunately, thread local variables have been well supported for compilers for a while,
|
|
|
|
// but with semantics supporting only POD types, so we can use a few defines to get some amount of
|
|
|
|
// backwards compat support.
|
|
|
|
// WARNING: This only works correctly with POD types.
|
|
|
|
#if defined(__clang__)
|
2016-09-18 01:38:01 +01:00
|
|
|
#if !__has_feature(cxx_thread_local)
|
|
|
|
#define thread_local __thread
|
|
|
|
#endif
|
2015-02-05 16:53:25 +00:00
|
|
|
#elif defined(__GNUC__)
|
2016-09-18 01:38:01 +01:00
|
|
|
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
|
|
|
|
#define thread_local __thread
|
|
|
|
#endif
|
2015-02-05 16:53:25 +00:00
|
|
|
#elif defined(_MSC_VER)
|
2016-09-18 01:38:01 +01:00
|
|
|
#if _MSC_VER < 1900
|
|
|
|
#define thread_local __declspec(thread)
|
|
|
|
#endif
|
2015-02-05 16:53:25 +00:00
|
|
|
#endif
|
|
|
|
|
2016-04-14 12:53:05 +01:00
|
|
|
namespace Common {
|
2013-09-05 01:17:46 +01:00
|
|
|
|
|
|
|
int CurrentThreadId();
|
|
|
|
|
|
|
|
void SetThreadAffinity(std::thread::native_handle_type thread, u32 mask);
|
|
|
|
void SetCurrentThreadAffinity(u32 mask);
|
2014-11-19 08:49:13 +00:00
|
|
|
|
2015-04-16 21:55:30 +01:00
|
|
|
class Event {
|
2013-09-05 01:17:46 +01:00
|
|
|
public:
|
2016-09-18 01:38:01 +01:00
|
|
|
Event() : is_set(false) {
|
|
|
|
}
|
2014-04-01 23:20:08 +01:00
|
|
|
|
2015-04-16 21:55:30 +01:00
|
|
|
void Set() {
|
2016-04-14 12:53:05 +01:00
|
|
|
std::lock_guard<std::mutex> lk(mutex);
|
2015-04-16 21:55:30 +01:00
|
|
|
if (!is_set) {
|
2014-04-01 23:20:08 +01:00
|
|
|
is_set = true;
|
2016-04-14 12:53:05 +01:00
|
|
|
condvar.notify_one();
|
2014-04-01 23:20:08 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-04-16 21:55:30 +01:00
|
|
|
void Wait() {
|
2016-04-14 12:53:05 +01:00
|
|
|
std::unique_lock<std::mutex> lk(mutex);
|
2016-09-18 01:38:01 +01:00
|
|
|
condvar.wait(lk, [&] { return is_set; });
|
2014-04-01 23:20:08 +01:00
|
|
|
is_set = false;
|
|
|
|
}
|
|
|
|
|
2015-04-16 21:55:30 +01:00
|
|
|
void Reset() {
|
2016-04-14 12:53:05 +01:00
|
|
|
std::unique_lock<std::mutex> lk(mutex);
|
2016-09-18 01:38:01 +01:00
|
|
|
// no other action required, since wait loops on the predicate and any lingering signal will
|
|
|
|
// get cleared on the first iteration
|
2014-04-01 23:20:08 +01:00
|
|
|
is_set = false;
|
|
|
|
}
|
2013-09-05 01:17:46 +01:00
|
|
|
|
|
|
|
private:
|
2015-04-16 21:55:30 +01:00
|
|
|
bool is_set;
|
2016-04-14 12:53:05 +01:00
|
|
|
std::condition_variable condvar;
|
|
|
|
std::mutex mutex;
|
2013-09-05 01:17:46 +01:00
|
|
|
};
|
|
|
|
|
2015-04-16 21:55:30 +01:00
|
|
|
class Barrier {
|
2013-09-05 01:17:46 +01:00
|
|
|
public:
|
2016-09-18 01:38:01 +01:00
|
|
|
explicit Barrier(size_t count_) : count(count_), waiting(0), generation(0) {
|
|
|
|
}
|
2014-04-01 23:20:08 +01:00
|
|
|
|
2015-04-16 21:55:30 +01:00
|
|
|
/// Blocks until all "count" threads have called Sync()
|
|
|
|
void Sync() {
|
2016-04-14 12:53:05 +01:00
|
|
|
std::unique_lock<std::mutex> lk(mutex);
|
2016-04-14 12:54:06 +01:00
|
|
|
const size_t current_generation = generation;
|
2014-04-01 23:20:08 +01:00
|
|
|
|
2016-04-14 12:53:05 +01:00
|
|
|
if (++waiting == count) {
|
2016-04-14 12:54:06 +01:00
|
|
|
generation++;
|
2016-04-14 12:53:05 +01:00
|
|
|
waiting = 0;
|
|
|
|
condvar.notify_all();
|
2015-04-16 21:55:30 +01:00
|
|
|
} else {
|
2016-09-18 01:38:01 +01:00
|
|
|
condvar.wait(lk,
|
|
|
|
[this, current_generation] { return current_generation != generation; });
|
2014-04-01 23:20:08 +01:00
|
|
|
}
|
|
|
|
}
|
2013-09-05 01:17:46 +01:00
|
|
|
|
|
|
|
private:
|
2016-04-14 12:53:05 +01:00
|
|
|
std::condition_variable condvar;
|
|
|
|
std::mutex mutex;
|
|
|
|
const size_t count;
|
|
|
|
size_t waiting;
|
2016-04-14 12:54:06 +01:00
|
|
|
size_t generation; // Incremented once each time the barrier is used
|
2013-09-05 01:17:46 +01:00
|
|
|
};
|
2014-11-19 08:49:13 +00:00
|
|
|
|
2013-09-05 01:17:46 +01:00
|
|
|
void SleepCurrentThread(int ms);
|
2016-09-18 01:38:01 +01:00
|
|
|
void SwitchCurrentThread(); // On Linux, this is equal to sleep 1ms
|
2013-09-05 01:17:46 +01:00
|
|
|
|
|
|
|
// Use this function during a spin-wait to make the current thread
|
|
|
|
// relax while another thread is working. This may be more efficient
|
|
|
|
// than using events because event functions use kernel calls.
|
2016-04-14 12:53:05 +01:00
|
|
|
inline void YieldCPU() {
|
2014-04-01 23:20:08 +01:00
|
|
|
std::this_thread::yield();
|
2013-09-05 01:17:46 +01:00
|
|
|
}
|
2014-11-19 08:49:13 +00:00
|
|
|
|
2016-09-18 01:38:01 +01:00
|
|
|
void SetCurrentThreadName(const char* name);
|
2014-11-19 08:49:13 +00:00
|
|
|
|
2013-09-05 01:17:46 +01:00
|
|
|
} // namespace Common
|