From 170e19d4eab455ad4d28ad72799cc6687692392d Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Tue, 17 Jul 2018 00:05:13 -0400
Subject: nvflinger: Fix for BufferQueue event handling.

---
 src/core/hle/kernel/hle_ipc.cpp | 10 ++++++++--
 src/core/hle/kernel/hle_ipc.h   |  4 +++-
 2 files changed, 11 insertions(+), 3 deletions(-)

(limited to 'src/core/hle/kernel')

diff --git a/src/core/hle/kernel/hle_ipc.cpp b/src/core/hle/kernel/hle_ipc.cpp
index 2532dd450..b1e6f565b 100644
--- a/src/core/hle/kernel/hle_ipc.cpp
+++ b/src/core/hle/kernel/hle_ipc.cpp
@@ -29,7 +29,8 @@ void SessionRequestHandler::ClientDisconnected(SharedPtr<ServerSession> server_s
 
 SharedPtr<Event> HLERequestContext::SleepClientThread(SharedPtr<Thread> thread,
                                                       const std::string& reason, u64 timeout,
-                                                      WakeupCallback&& callback) {
+                                                      WakeupCallback&& callback,
+                                                      Kernel::SharedPtr<Kernel::Event> event) {
 
     // Put the client thread to sleep until the wait event is signaled or the timeout expires.
     thread->wakeup_callback =
@@ -41,7 +42,12 @@ SharedPtr<Event> HLERequestContext::SleepClientThread(SharedPtr<Thread> thread,
         return true;
     };
 
-    auto event = Kernel::Event::Create(Kernel::ResetType::OneShot, "HLE Pause Event: " + reason);
+    if (!event) {
+        // Create event if not provided
+        event = Kernel::Event::Create(Kernel::ResetType::OneShot, "HLE Pause Event: " + reason);
+    }
+
+    event->Clear();
     thread->status = THREADSTATUS_WAIT_HLE_EVENT;
     thread->wait_objects = {event};
     event->AddWaitingThread(thread);
diff --git a/src/core/hle/kernel/hle_ipc.h b/src/core/hle/kernel/hle_ipc.h
index 376263eac..c6eca7404 100644
--- a/src/core/hle/kernel/hle_ipc.h
+++ b/src/core/hle/kernel/hle_ipc.h
@@ -118,10 +118,12 @@ public:
      * @param callback Callback to be invoked when the thread is resumed. This callback must write
      * the entire command response once again, regardless of the state of it before this function
      * was called.
+     * @param event Event to use to wake up the thread. If unspecified, an event will be created.
      * @returns Event that when signaled will resume the thread and call the callback function.
      */
     SharedPtr<Event> SleepClientThread(SharedPtr<Thread> thread, const std::string& reason,
-                                       u64 timeout, WakeupCallback&& callback);
+                                       u64 timeout, WakeupCallback&& callback,
+                                       Kernel::SharedPtr<Kernel::Event> event = nullptr);
 
     void ParseCommandBuffer(u32_le* src_cmdbuf, bool incoming);
 
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