From 433b59c1121a257ae3c1503fff5b71d3f3852ab5 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Wed, 17 Apr 2019 07:08:12 -0400
Subject: [PATCH] kernel/svc: Migrate svcCancelSynchronization behavior to a
 thread function

The actual behavior of this function is slightly more complex than what
we're currently doing within the supervisor call. To avoid dumping most
of this behavior in the supervisor call itself, we can migrate this to
another function.
---
 src/core/hle/kernel/svc.cpp    |  6 ++----
 src/core/hle/kernel/thread.cpp |  6 ++++++
 src/core/hle/kernel/thread.h   | 12 +++++++++---
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index d48a2203a..b25190882 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -518,16 +518,14 @@ static ResultCode CancelSynchronization(Core::System& system, Handle thread_hand
     LOG_TRACE(Kernel_SVC, "called thread=0x{:X}", thread_handle);
 
     const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
-    const SharedPtr<Thread> thread = handle_table.Get<Thread>(thread_handle);
+    SharedPtr<Thread> thread = handle_table.Get<Thread>(thread_handle);
     if (!thread) {
         LOG_ERROR(Kernel_SVC, "Thread handle does not exist, thread_handle=0x{:08X}",
                   thread_handle);
         return ERR_INVALID_HANDLE;
     }
 
-    ASSERT(thread->GetStatus() == ThreadStatus::WaitSynchAny);
-    thread->SetWaitSynchronizationResult(ERR_SYNCHRONIZATION_CANCELED);
-    thread->ResumeFromWait();
+    thread->CancelWait();
     return RESULT_SUCCESS;
 }
 
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index ca52267b2..7d4fe9608 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -142,6 +142,12 @@ void Thread::ResumeFromWait() {
     ChangeScheduler();
 }
 
+void Thread::CancelWait() {
+    ASSERT(GetStatus() == ThreadStatus::WaitSynchAny);
+    SetWaitSynchronizationResult(ERR_SYNCHRONIZATION_CANCELED);
+    ResumeFromWait();
+}
+
 /**
  * Resets a thread context, making it ready to be scheduled and run by the CPU
  * @param context Thread context to reset
diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h
index 32026d7f0..e3c457408 100644
--- a/src/core/hle/kernel/thread.h
+++ b/src/core/hle/kernel/thread.h
@@ -164,11 +164,17 @@ public:
         return tls_memory;
     }
 
-    /**
-     * Resumes a thread from waiting
-     */
+    /// Resumes a thread from waiting
     void ResumeFromWait();
 
+    /// Cancels a waiting operation that this thread may or may not be within.
+    ///
+    /// When the thread is within a waiting state, this will set the thread's
+    /// waiting result to signal a canceled wait. The function will then resume
+    /// this thread.
+    ///
+    void CancelWait();
+
     /**
      * Schedules an event to wake up the specified thread after the specified delay
      * @param nanoseconds The time this thread will be allowed to sleep for