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Merge pull request #1732 from DarkLordZach/yield-types

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svc: Implement yield types 0 and -1
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bunnei 2018-12-15 00:28:12 -05:00 • committed by GitHub
commit 2f2fc47af2
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5 changed files with 181 additions and 9 deletions
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38
src/core/hle/kernel/svc.cpp
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@ -1208,18 +1208,38 @@ static void ExitThread() {
static void SleepThread(s64 nanoseconds) {
LOG_TRACE(Kernel_SVC, "called nanoseconds={}", nanoseconds);
// Don't attempt to yield execution if there are no available threads to run,
// this way we avoid a useless reschedule to the idle thread.
if (nanoseconds == 0 && !Core::System::GetInstance().CurrentScheduler().HaveReadyThreads())
return;
enum class SleepType : s64 {
YieldWithoutLoadBalancing = 0,
YieldWithLoadBalancing = -1,
YieldAndWaitForLoadBalancing = -2,
};
// Sleep current thread and check for next thread to schedule
WaitCurrentThread_Sleep();
if (nanoseconds <= 0) {
auto& scheduler{Core::System::GetInstance().CurrentScheduler()};
switch (static_cast<SleepType>(nanoseconds)) {
case SleepType::YieldWithoutLoadBalancing:
scheduler.YieldWithoutLoadBalancing(GetCurrentThread());
break;
case SleepType::YieldWithLoadBalancing:
scheduler.YieldWithLoadBalancing(GetCurrentThread());
break;
case SleepType::YieldAndWaitForLoadBalancing:
scheduler.YieldAndWaitForLoadBalancing(GetCurrentThread());
break;
default:
UNREACHABLE_MSG("Unimplemented sleep yield type '{:016X}'!", nanoseconds);
}
} else {
// Sleep current thread and check for next thread to schedule
WaitCurrentThread_Sleep();
// Create an event to wake the thread up after the specified nanosecond delay has passed
GetCurrentThread()->WakeAfterDelay(nanoseconds);
// Create an event to wake the thread up after the specified nanosecond delay has passed
GetCurrentThread()->WakeAfterDelay(nanoseconds);
}
Core::System::GetInstance().PrepareReschedule();
// Reschedule all CPU cores
for (std::size_t i = 0; i < Core::NUM_CPU_CORES; ++i)
Core::System::GetInstance().CpuCore(i).PrepareReschedule();
}
/// Wait process wide key atomic