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Linux: use futex_waitv syscall for atomic waiting

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In order to make this possible, some unnecessary features were removed.
This commit is contained in:
Ivan Chikish 2023-07-31 23:57:26 +03:00 • committed by Ivan
parent 831a9fe012
commit d34287b2cc
51 changed files with 441 additions and 574 deletions
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33
Utilities/Thread.h
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@ -100,17 +100,19 @@ class thread_future
protected:
atomic_t<void(*)(thread_base*, thread_future*)> exec{};
atomic_t<u32> done{0};
public:
// Get reference to the atomic variable for inspection and waiting for
const auto& get_wait() const
{
return exec;
return done;
}
// Wait (preset)
void wait() const
{
exec.wait<atomic_wait::op_ne>(nullptr);
done.wait(0);
}
};
@ -131,8 +133,13 @@ private:
// Thread handle (platform-specific)
atomic_t<u64> m_thread{0};
// Thread state and cycles
atomic_t<u64> m_sync{0};
// Thread cycles
atomic_t<u64> m_cycles{0};
atomic_t<u32> m_dummy{0};
// Thread state
atomic_t<u32> m_sync{0};
// Thread name
atomic_ptr<std::string> m_tname;
@ -284,16 +291,22 @@ public:
}
atomic_wait::list<Max + 2> list{};
list.template set<Max>(_this->m_sync, 0, 4 + 1);
list.template set<Max + 1>(_this->m_taskq, nullptr);
list.template set<Max>(_this->m_sync, 0);
list.template set<Max + 1>(_this->m_taskq);
setter(list);
list.wait(atomic_wait_timeout{usec <= 0xffff'ffff'ffff'ffff / 1000 ? usec * 1000 : 0xffff'ffff'ffff'ffff});
}
template <atomic_wait::op Op = atomic_wait::op::eq, typename T, typename U>
template <typename T, typename U>
static inline void wait_on(T& wait, U old, u64 usec = -1)
{
wait_on_custom<1>([&](atomic_wait::list<3>& list){ list.set<0, Op>(wait, old); }, usec);
wait_on_custom<1>([&](atomic_wait::list<3>& list) { list.template set<0>(wait, old); }, usec);
}
template <typename T>
static inline void wait_on(T& wait)
{
wait_on_custom<1>([&](atomic_wait::list<3>& list) { list.template set<0>(wait); });
}
// Exit.
@ -637,7 +650,7 @@ public:
{
bool notify_sync = false;
if (s >= thread_state::aborting && thread::m_sync.fetch_op([](u64& v){ return !(v & 3) && (v |= 1); }).second)
if (s >= thread_state::aborting && thread::m_sync.fetch_op([](u32& v) { return !(v & 3) && (v |= 1); }).second)
{
notify_sync = true;
}
@ -650,7 +663,7 @@ public:
if (notify_sync)
{
// Notify after context abortion has been made so all conditions for wake-up be satisfied by the time of notification
thread::m_sync.notify_one(1);
thread::m_sync.notify_all();
}
if (s == thread_state::finished)