From bc91ebacc1810db003d4a87cb595e0d07fc14000 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Tue, 9 Jan 2018 15:02:04 -0500
Subject: [PATCH] SVC: Implemented CancelSynchronization.

---
 src/core/hle/kernel/errors.h |  2 ++
 src/core/hle/kernel/svc.cpp  | 18 +++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/core/hle/kernel/errors.h b/src/core/hle/kernel/errors.h
index c963d7e9a9..3b7b6f7a97 100644
--- a/src/core/hle/kernel/errors.h
+++ b/src/core/hle/kernel/errors.h
@@ -22,6 +22,8 @@ enum {
     // Confirmed Switch OS error codes
     InvalidHandle = 114,
     Timeout = 117,
+    SynchronizationCanceled = 118,
+    TooLarge = 119,
 };
 }
 
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index c3280bfa32..b7cad22482 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -216,6 +216,22 @@ static ResultCode WaitSynchronization(Handle* index, VAddr handles_address, u64
     return WaitSynchronization1(objects[0], GetCurrentThread(), nano_seconds);
 }
 
+/// Resumes a thread waiting on WaitSynchronization
+static ResultCode CancelSynchronization(Handle thread_handle) {
+    LOG_TRACE(Kernel_SVC, "called thread=0x%08X", thread_handle);
+
+    const SharedPtr<Thread> thread = g_handle_table.Get<Thread>(thread_handle);
+    if (!thread) {
+        return ERR_INVALID_HANDLE;
+    }
+
+    ASSERT(thread->status == THREADSTATUS_WAIT_SYNCH_ANY);
+    thread->SetWaitSynchronizationResult(
+        ResultCode(ErrorModule::Kernel, ErrCodes::SynchronizationCanceled));
+    thread->ResumeFromWait();
+    return RESULT_SUCCESS;
+}
+
 /// Attempts to locks a mutex, creating it if it does not already exist
 static ResultCode LockMutex(Handle holding_thread_handle, VAddr mutex_addr,
                             Handle requesting_thread_handle) {
@@ -646,7 +662,7 @@ static const FunctionDef SVC_Table[] = {
     {0x16, SvcWrap<CloseHandle>, "CloseHandle"},
     {0x17, nullptr, "ResetSignal"},
     {0x18, SvcWrap<WaitSynchronization>, "WaitSynchronization"},
-    {0x19, nullptr, "CancelSynchronization"},
+    {0x19, SvcWrap<CancelSynchronization>, "CancelSynchronization"},
     {0x1A, SvcWrap<LockMutex>, "LockMutex"},
     {0x1B, SvcWrap<UnlockMutex>, "UnlockMutex"},
     {0x1C, SvcWrap<WaitProcessWideKeyAtomic>, "WaitProcessWideKeyAtomic"},