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This could alleviate the suffering of dual core synchronization a bit.

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But I doubt you would notice it in most cases.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4830 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
ayuanx
2010-01-14 10:52:14 +00:00
parent b186f0821e
commit 571a47ef9a
11 changed files with 108 additions and 49 deletions
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55
Source/Core/Common/Src/Thread.cpp
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@ -117,6 +117,60 @@ void Thread::SetCurrentThreadAffinity(int mask)
SetThreadAffinityMask(GetCurrentThread(), mask);
}
#ifdef _WIN32
EventEx::EventEx()
{
InterlockedExchange(&m_Lock, 1);
}
void EventEx::Init()
{
InterlockedExchange(&m_Lock, 1);
}
void EventEx::Shutdown()
{
InterlockedExchange(&m_Lock, 0);
}
void EventEx::Set()
{
InterlockedExchange(&m_Lock, 0);
}
void EventEx::Spin()
{
while (InterlockedCompareExchange(&m_Lock, 1, 0))
// This only yields when there is a runnable thread on this core
// If not, spin
SwitchToThread();
}
void EventEx::Wait()
{
while (InterlockedCompareExchange(&m_Lock, 1, 0))
// This directly enters Ring0 and enforces a sleep about 15ms
SleepCurrentThread(1);
}
bool EventEx::MsgWait()
{
while (InterlockedCompareExchange(&m_Lock, 1, 0))
{
MSG msg;
while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT) return false;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
// This directly enters Ring0 and enforces a sleep about 15ms
SleepCurrentThread(1);
}
return true;
}
#endif
// Regular same thread loop based waiting
Event::Event()
{
@ -164,6 +218,7 @@ void Event::MsgWait()
if (msg.message == WM_QUIT)
return;
// Otherwise, dispatch the message.
TranslateMessage(&msg);
DispatchMessage(&msg);
}