mirror of
https://git.suyu.dev/suyu/suyu.git
synced 2024-11-27 17:22:46 +01:00
122 lines
3.1 KiB
C++
122 lines
3.1 KiB
C++
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include "common/common_types.h"
|
|
#include <cstdio>
|
|
#include <cstring>
|
|
#include <thread>
|
|
#include <condition_variable>
|
|
#include <mutex>
|
|
|
|
// This may not be defined outside _WIN32
|
|
#ifndef _WIN32
|
|
#ifndef INFINITE
|
|
#define INFINITE 0xffffffff
|
|
#endif
|
|
|
|
//for gettimeofday and struct time(spec|val)
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
// 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__)
|
|
# if !__has_feature(cxx_thread_local)
|
|
# define thread_local __thread
|
|
# endif
|
|
#elif defined(__GNUC__)
|
|
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
|
|
# define thread_local __thread
|
|
# endif
|
|
#elif defined(_MSC_VER)
|
|
# if _MSC_VER < 1900
|
|
# define thread_local __declspec(thread)
|
|
# endif
|
|
#endif
|
|
|
|
namespace Common
|
|
{
|
|
|
|
int CurrentThreadId();
|
|
|
|
void SetThreadAffinity(std::thread::native_handle_type thread, u32 mask);
|
|
void SetCurrentThreadAffinity(u32 mask);
|
|
|
|
class Event {
|
|
public:
|
|
Event() : is_set(false) {}
|
|
|
|
void Set() {
|
|
std::lock_guard<std::mutex> lk(m_mutex);
|
|
if (!is_set) {
|
|
is_set = true;
|
|
m_condvar.notify_one();
|
|
}
|
|
}
|
|
|
|
void Wait() {
|
|
std::unique_lock<std::mutex> lk(m_mutex);
|
|
m_condvar.wait(lk, [&]{ return is_set; });
|
|
is_set = false;
|
|
}
|
|
|
|
void Reset() {
|
|
std::unique_lock<std::mutex> lk(m_mutex);
|
|
// no other action required, since wait loops on the predicate and any lingering signal will get cleared on the first iteration
|
|
is_set = false;
|
|
}
|
|
|
|
private:
|
|
bool is_set;
|
|
std::condition_variable m_condvar;
|
|
std::mutex m_mutex;
|
|
};
|
|
|
|
class Barrier {
|
|
public:
|
|
Barrier(size_t count) : m_count(count), m_waiting(0) {}
|
|
|
|
/// Blocks until all "count" threads have called Sync()
|
|
void Sync() {
|
|
std::unique_lock<std::mutex> lk(m_mutex);
|
|
|
|
// TODO: broken when next round of Sync()s
|
|
// is entered before all waiting threads return from the notify_all
|
|
|
|
if (++m_waiting == m_count) {
|
|
m_waiting = 0;
|
|
m_condvar.notify_all();
|
|
} else {
|
|
m_condvar.wait(lk, [&]{ return m_waiting == 0; });
|
|
}
|
|
}
|
|
|
|
private:
|
|
std::condition_variable m_condvar;
|
|
std::mutex m_mutex;
|
|
const size_t m_count;
|
|
size_t m_waiting;
|
|
};
|
|
|
|
void SleepCurrentThread(int ms);
|
|
void SwitchCurrentThread(); // On Linux, this is equal to sleep 1ms
|
|
|
|
// 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.
|
|
inline void YieldCPU()
|
|
{
|
|
std::this_thread::yield();
|
|
}
|
|
|
|
void SetCurrentThreadName(const char *name);
|
|
|
|
} // namespace Common
|