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-rw-r--r--src/core/hle/kernel/thread.cpp37
-rw-r--r--src/core/hle/kernel/thread.h7
2 files changed, 44 insertions, 0 deletions
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index ab5a5559e..86bbf29d0 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -188,6 +188,43 @@ void ChangeThreadState(Thread* t, ThreadStatus new_status) {
}
}
+/// Arbitrate the highest priority thread that is waiting
+Handle ArbitrateHighestPriorityThread(u32 arbiter, u32 address) {
+ Handle highest_priority_thread = 0;
+ s32 priority = THREADPRIO_LOWEST;
+
+ // Iterate through threads, find highest priority thread that is waiting to be arbitrated...
+ for (const auto& handle : g_thread_queue) {
+
+ // TODO(bunnei): Verify arbiter address...
+ if (!VerifyWait(handle, WAITTYPE_ARB, arbiter))
+ continue;
+
+ Thread* thread = g_object_pool.GetFast<Thread>(handle);
+ if(thread->current_priority <= priority) {
+ highest_priority_thread = handle;
+ priority = thread->current_priority;
+ }
+ }
+ // If a thread was arbitrated, resume it
+ if (0 != highest_priority_thread)
+ ResumeThreadFromWait(highest_priority_thread);
+
+ return highest_priority_thread;
+}
+
+/// Arbitrate all threads currently waiting
+void ArbitrateAllThreads(u32 arbiter, u32 address) {
+
+ // Iterate through threads, find highest priority thread that is waiting to be arbitrated...
+ for (const auto& handle : g_thread_queue) {
+
+ // TODO(bunnei): Verify arbiter address...
+ if (VerifyWait(handle, WAITTYPE_ARB, arbiter))
+ ResumeThreadFromWait(handle);
+ }
+}
+
/// Calls a thread by marking it as "ready" (note: will not actually execute until current thread yields)
void CallThread(Thread* t) {
// Stop waiting
diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h
index 04914ba90..f2bfdfa1a 100644
--- a/src/core/hle/kernel/thread.h
+++ b/src/core/hle/kernel/thread.h
@@ -39,6 +39,7 @@ enum WaitType {
WAITTYPE_VBLANK,
WAITTYPE_MUTEX,
WAITTYPE_SYNCH,
+ WAITTYPE_ARB,
};
namespace Kernel {
@@ -59,6 +60,12 @@ void StopThread(Handle thread, const char* reason);
/// Resumes a thread from waiting by marking it as "ready"
void ResumeThreadFromWait(Handle handle);
+/// Arbitrate the highest priority thread that is waiting
+Handle ArbitrateHighestPriorityThread(u32 arbiter, u32 address);
+
+/// Arbitrate all threads currently waiting...
+void ArbitrateAllThreads(u32 arbiter, u32 address);
+
/// Gets the current thread handle
Handle GetCurrentThreadHandle();