svc: Implement SetThreadActivity (thread suspension)

src/core/hle/kernel/thread.h

@@ -44,6 +44,7 @@ enum ThreadProcessorId : s32 {
 enum class ThreadStatus {
     Running,      ///< Currently running
     Ready,        ///< Ready to run
+    Paused,       ///< Paused by SetThreadActivity or debug
     WaitHLEEvent, ///< Waiting for hle event to finish
     WaitSleep,    ///< Waiting due to a SleepThread SVC
     WaitIPC,      ///< Waiting for the reply from an IPC request
@@ -60,6 +61,11 @@ enum class ThreadWakeupReason {
     Timeout // The thread was woken up due to a wait timeout.
 };
 
+enum class ThreadActivity : u32 {
+    Normal = 0,
+    Paused = 1,
+};
+
 class Thread final : public WaitObject {
 public:
     using TLSMemory = std::vector<u8>;
@@ -370,6 +376,12 @@ public:
         return affinity_mask;
     }
 
+    ThreadActivity GetActivity() const {
+        return activity;
+    }
+
+    void SetActivity(ThreadActivity value);
+
 private:
     explicit Thread(KernelCore& kernel);
     ~Thread() override;
@@ -438,6 +450,8 @@ private:
     TLSMemoryPtr tls_memory = std::make_shared<TLSMemory>();
 
     std::string name;
+
+    ThreadActivity activity = ThreadActivity::Normal;
 };
 
 /**