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Threads: Use a dummy idle thread when no other are ready.

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This thread will not actually execute instructions, it will only advance the timing/events and try to yield immediately to the next ready thread, if there aren't any ready threads then it will be rescheduled and start its job again.
This commit is contained in:
Subv 2015-01-07 10:10:58 -05:00
parent b659cac2dc
commit 60a373a786
4 changed files with 47 additions and 2 deletions
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13
src/core/core.cpp
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@ -5,6 +5,7 @@
#include "common/common_types.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/settings.h"
#include "core/arm/disassembler/arm_disasm.h"
@ -23,7 +24,17 @@ ARM_Interface* g_sys_core = nullptr; ///< ARM11 system (OS) core
/// Run the core CPU loop
void RunLoop(int tight_loop) {
g_app_core->Run(tight_loop);
// If the current thread is an idle thread, then don't execute instructions,
// instead advance to the next event and try to yield to the next thread
if (Kernel::IsIdleThread(Kernel::GetCurrentThreadHandle())) {
LOG_TRACE(Core_ARM11, "Idling");
CoreTiming::Idle();
CoreTiming::Advance();
HLE::Reschedule(__func__);
} else {
g_app_core->Run(tight_loop);
}
HW::Update();
if (HLE::g_reschedule) {
Kernel::Reschedule();