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Merge pull request #699 from yuriks/event-use-lambda

Common: thread.h cleanups
This commit is contained in:
bunnei 2015-04-17 20:18:01 -04:00
commit 1add98d7f8

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@ -51,109 +51,60 @@ int CurrentThreadId();
void SetThreadAffinity(std::thread::native_handle_type thread, u32 mask);
void SetCurrentThreadAffinity(u32 mask);
class Event
{
class Event {
public:
Event()
: is_set(false)
{}
Event() : is_set(false) {}
void Set()
{
void Set() {
std::lock_guard<std::mutex> lk(m_mutex);
if (!is_set)
{
if (!is_set) {
is_set = true;
m_condvar.notify_one();
}
}
void Wait()
{
void Wait() {
std::unique_lock<std::mutex> lk(m_mutex);
m_condvar.wait(lk, IsSet(this));
m_condvar.wait(lk, [&]{ return is_set; });
is_set = false;
}
void Reset()
{
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;
bool is_set;
std::condition_variable m_condvar;
std::mutex m_mutex;
};
// TODO: doesn't work on windows with (count > 2)
class Barrier
{
class Barrier {
public:
Barrier(size_t count)
: m_count(count), m_waiting(0)
{}
Barrier(size_t count) : m_count(count), m_waiting(0) {}
// block until "count" threads call Sync()
bool Sync()
{
/// 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_count == ++m_waiting)
{
if (++m_waiting == m_count) {
m_waiting = 0;
m_condvar.notify_all();
return true;
}
else
{
m_condvar.wait(lk, IsDoneWating(this));
return false;
} else {
m_condvar.wait(lk, [&]{ return m_waiting == 0; });
}
}
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;
size_t m_waiting;
};
void SleepCurrentThread(int ms);