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atomic.cpp: implement notify callback

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Notification can be very heavy, especially if we need to wake many threads.
Callback is set for cpu_thread in order to set wait flag accordingly.
This commit is contained in:
Nekotekina 2020-10-26 04:02:39 +03:00
parent 0a121e9d26
commit 6806e3d5c7
4 changed files with 94 additions and 4 deletions
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25
rpcs3/Emu/CPU/CPUThread.cpp
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@ -446,6 +446,29 @@ void cpu_thread::operator()()
return;
}
atomic_storage_futex::set_notify_callback([](const void*, u64 progress)
{
static thread_local bool wait_set = false;
cpu_thread* _cpu = get_current_cpu_thread();
// Wait flag isn't set asynchronously so this should be thread-safe
if (progress == 0 && !(_cpu->state & cpu_flag::wait))
{
// Operation just started and syscall is imminent
_cpu->state += cpu_flag::wait + cpu_flag::temp;
wait_set = true;
return;
}
if (progress == umax && std::exchange(wait_set, false))
{
// Operation finished: need to clean wait flag
verify(HERE), !_cpu->check_state();
return;
}
});
static thread_local struct thread_cleanup_t
{
cpu_thread* _this;
@ -469,6 +492,8 @@ void cpu_thread::operator()()
ptr->compare_and_swap(_this, nullptr);
}
atomic_storage_futex::set_notify_callback(nullptr);
g_fxo->get<cpu_counter>()->remove(_this, s_tls_thread_slot);
_this = nullptr;