forked from dolphin-emu/dolphin
157 lines
2.7 KiB
C++
157 lines
2.7 KiB
C++
// Copyright 2013 Dolphin Emulator Project
|
|
// Licensed under GPLv2
|
|
// Refer to the license.txt file included.
|
|
|
|
#ifndef _THREAD_H_
|
|
#define _THREAD_H_
|
|
|
|
#include "StdConditionVariable.h"
|
|
#include "StdMutex.h"
|
|
#include "StdThread.h"
|
|
|
|
// Don't include common.h here as it will break LogManager
|
|
#include "CommonTypes.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
// 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>
|
|
#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, IsSet(this));
|
|
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:
|
|
class IsSet
|
|
{
|
|
public:
|
|
IsSet(const Event* ev)
|
|
: m_event(ev)
|
|
{}
|
|
|
|
bool operator()()
|
|
{
|
|
return m_event->is_set;
|
|
}
|
|
|
|
private:
|
|
const Event* const m_event;
|
|
};
|
|
|
|
volatile bool is_set;
|
|
std::condition_variable m_condvar;
|
|
std::mutex m_mutex;
|
|
};
|
|
|
|
// TODO: doesn't work on windows with (count > 2)
|
|
class Barrier
|
|
{
|
|
public:
|
|
Barrier(size_t count)
|
|
: m_count(count), m_waiting(0)
|
|
{}
|
|
|
|
// block until "count" threads call Sync()
|
|
bool 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_count == ++m_waiting)
|
|
{
|
|
m_waiting = 0;
|
|
m_condvar.notify_all();
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
m_condvar.wait(lk, IsDoneWating(this));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
private:
|
|
class IsDoneWating
|
|
{
|
|
public:
|
|
IsDoneWating(const Barrier* bar)
|
|
: m_bar(bar)
|
|
{}
|
|
|
|
bool operator()()
|
|
{
|
|
return (0 == m_bar->m_waiting);
|
|
}
|
|
|
|
private:
|
|
const Barrier* const m_bar;
|
|
};
|
|
|
|
std::condition_variable m_condvar;
|
|
std::mutex m_mutex;
|
|
const size_t m_count;
|
|
volatile 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
|
|
|
|
#endif // _THREAD_H_
|