From d494b074e8afd3aff7b65afc7b977496be06ccc9 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Tue, 10 Mar 2020 13:13:39 -0400
Subject: Kernel: Preempt Single core on redudant yields.

---
 src/core/hle/kernel/thread.cpp | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

(limited to 'src/core/hle/kernel/thread.cpp')

diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index fc6c0bc85..1c32552b1 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -435,28 +435,31 @@ ResultCode Thread::Sleep(s64 nanoseconds) {
     return RESULT_SUCCESS;
 }
 
-ResultCode Thread::YieldSimple() {
+std::pair<ResultCode, bool> Thread::YieldSimple() {
+    bool is_redundant = false;
     {
         SchedulerLock lock(kernel);
-        kernel.GlobalScheduler().YieldThread(this);
+        is_redundant = kernel.GlobalScheduler().YieldThread(this);
     }
-    return RESULT_SUCCESS;
+    return {RESULT_SUCCESS, is_redundant};
 }
 
-ResultCode Thread::YieldAndBalanceLoad() {
+std::pair<ResultCode, bool> Thread::YieldAndBalanceLoad() {
+    bool is_redundant = false;
     {
         SchedulerLock lock(kernel);
-        kernel.GlobalScheduler().YieldThreadAndBalanceLoad(this);
+        is_redundant = kernel.GlobalScheduler().YieldThreadAndBalanceLoad(this);
     }
-    return RESULT_SUCCESS;
+    return {RESULT_SUCCESS, is_redundant};
 }
 
-ResultCode Thread::YieldAndWaitForLoadBalancing() {
+std::pair<ResultCode, bool> Thread::YieldAndWaitForLoadBalancing() {
+    bool is_redundant = false;
     {
         SchedulerLock lock(kernel);
-        kernel.GlobalScheduler().YieldThreadAndWaitForLoadBalancing(this);
+        is_redundant = kernel.GlobalScheduler().YieldThreadAndWaitForLoadBalancing(this);
     }
-    return RESULT_SUCCESS;
+    return {RESULT_SUCCESS, is_redundant};
 }
 
 void Thread::AddSchedulingFlag(ThreadSchedFlags flag) {
-- 
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