From 8d6342384b3932e18e98c223debd192ae1b73216 Mon Sep 17 00:00:00 2001
From: Weiyi Wang <wwylele@gmail.com>
Date: Tue, 2 Apr 2019 12:30:03 -0400
Subject: HLE/IPC: HLEContext can memorize the client thread and use it for
 SleepClientThread

This reduces the boilerplate that services have to write out the current thread explicitly. Using current thread instead of client thread is also semantically incorrect, and will be a problem when we implement multicore (at which time there will be multiple current threads)
---
 src/core/hle/kernel/hle_ipc.cpp        | 7 ++++---
 src/core/hle/kernel/hle_ipc.h          | 8 ++++----
 src/core/hle/kernel/server_session.cpp | 2 +-
 src/core/hle/service/vi/vi.cpp         | 2 +-
 4 files changed, 10 insertions(+), 9 deletions(-)

(limited to 'src/core')

diff --git a/src/core/hle/kernel/hle_ipc.cpp b/src/core/hle/kernel/hle_ipc.cpp
index fe710eb6e..182f6f792 100644
--- a/src/core/hle/kernel/hle_ipc.cpp
+++ b/src/core/hle/kernel/hle_ipc.cpp
@@ -43,7 +43,7 @@ void SessionRequestHandler::ClientDisconnected(const SharedPtr<ServerSession>& s
 }
 
 SharedPtr<WritableEvent> HLERequestContext::SleepClientThread(
-    SharedPtr<Thread> thread, const std::string& reason, u64 timeout, WakeupCallback&& callback,
+    const std::string& reason, u64 timeout, WakeupCallback&& callback,
     SharedPtr<WritableEvent> writable_event) {
     // Put the client thread to sleep until the wait event is signaled or the timeout expires.
     thread->SetWakeupCallback([context = *this, callback](
@@ -76,8 +76,9 @@ SharedPtr<WritableEvent> HLERequestContext::SleepClientThread(
     return writable_event;
 }
 
-HLERequestContext::HLERequestContext(SharedPtr<Kernel::ServerSession> server_session)
-    : server_session(std::move(server_session)) {
+HLERequestContext::HLERequestContext(SharedPtr<Kernel::ServerSession> server_session,
+                                     SharedPtr<Thread> thread)
+    : server_session(std::move(server_session)), thread(thread) {
     cmd_buf[0] = 0;
 }
 
diff --git a/src/core/hle/kernel/hle_ipc.h b/src/core/hle/kernel/hle_ipc.h
index 2bdd9f02c..ccf5e56aa 100644
--- a/src/core/hle/kernel/hle_ipc.h
+++ b/src/core/hle/kernel/hle_ipc.h
@@ -97,7 +97,7 @@ protected:
  */
 class HLERequestContext {
 public:
-    explicit HLERequestContext(SharedPtr<ServerSession> session);
+    explicit HLERequestContext(SharedPtr<ServerSession> session, SharedPtr<Thread> thread);
     ~HLERequestContext();
 
     /// Returns a pointer to the IPC command buffer for this request.
@@ -119,7 +119,6 @@ public:
     /**
      * Puts the specified guest thread to sleep until the returned event is signaled or until the
      * specified timeout expires.
-     * @param thread Thread to be put to sleep.
      * @param reason Reason for pausing the thread, to be used for debugging purposes.
      * @param timeout Timeout in nanoseconds after which the thread will be awoken and the callback
      * invoked with a Timeout reason.
@@ -130,8 +129,8 @@ public:
      * created.
      * @returns Event that when signaled will resume the thread and call the callback function.
      */
-    SharedPtr<WritableEvent> SleepClientThread(SharedPtr<Thread> thread, const std::string& reason,
-                                               u64 timeout, WakeupCallback&& callback,
+    SharedPtr<WritableEvent> SleepClientThread(const std::string& reason, u64 timeout,
+                                               WakeupCallback&& callback,
                                                SharedPtr<WritableEvent> writable_event = nullptr);
 
     /// Populates this context with data from the requesting process/thread.
@@ -268,6 +267,7 @@ private:
 
     std::array<u32, IPC::COMMAND_BUFFER_LENGTH> cmd_buf;
     SharedPtr<Kernel::ServerSession> server_session;
+    SharedPtr<Thread> thread;
     // TODO(yuriks): Check common usage of this and optimize size accordingly
     boost::container::small_vector<SharedPtr<Object>, 8> move_objects;
     boost::container::small_vector<SharedPtr<Object>, 8> copy_objects;
diff --git a/src/core/hle/kernel/server_session.cpp b/src/core/hle/kernel/server_session.cpp
index 696a82cd9..30b2bfb5a 100644
--- a/src/core/hle/kernel/server_session.cpp
+++ b/src/core/hle/kernel/server_session.cpp
@@ -130,7 +130,7 @@ ResultCode ServerSession::HandleSyncRequest(SharedPtr<Thread> thread) {
     // The ServerSession received a sync request, this means that there's new data available
     // from its ClientSession, so wake up any threads that may be waiting on a svcReplyAndReceive or
     // similar.
-    Kernel::HLERequestContext context(this);
+    Kernel::HLERequestContext context(this, thread);
     u32* cmd_buf = (u32*)Memory::GetPointer(thread->GetTLSAddress());
     context.PopulateFromIncomingCommandBuffer(kernel.CurrentProcess()->GetHandleTable(), cmd_buf);
 
diff --git a/src/core/hle/service/vi/vi.cpp b/src/core/hle/service/vi/vi.cpp
index 4e17249a9..f1fa6ccd1 100644
--- a/src/core/hle/service/vi/vi.cpp
+++ b/src/core/hle/service/vi/vi.cpp
@@ -556,7 +556,7 @@ private:
             } else {
                 // Wait the current thread until a buffer becomes available
                 ctx.SleepClientThread(
-                    Kernel::GetCurrentThread(), "IHOSBinderDriver::DequeueBuffer", -1,
+                    "IHOSBinderDriver::DequeueBuffer", -1,
                     [=](Kernel::SharedPtr<Kernel::Thread> thread, Kernel::HLERequestContext& ctx,
                         Kernel::ThreadWakeupReason reason) {
                         // Repeat TransactParcel DequeueBuffer when a buffer is available
-- 
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