From 067b1f3ee0900b5fa4d63ca610cbf9eb357ab67f Mon Sep 17 00:00:00 2001
From: Thad House <ThadHouse@users.noreply.github.com>
Date: Tue, 9 May 2017 22:04:57 -0700
Subject: [PATCH] Adds a way to get the native handle from SafeThread (#198)

Useful to wpilib to enable easier changing of RT priorities.
---
 include/support/SafeThread.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/support/SafeThread.h b/include/support/SafeThread.h
index 465957be3d..0f39bc6811 100644
--- a/include/support/SafeThread.h
+++ b/include/support/SafeThread.h
@@ -82,9 +82,13 @@ class SafeThreadOwnerBase {
  protected:
   void Start(SafeThread* thr);
   SafeThread* GetThread() const { return m_thread.load(); }
+  std::thread::native_handle_type GetNativeThreadHandle() const {
+    return m_nativeHandle;
+  }
 
  private:
   std::atomic<SafeThread*> m_thread;
+  std::atomic<std::thread::native_handle_type> m_nativeHandle;
 };
 
 inline void SafeThreadOwnerBase::Start(SafeThread* thr) {
@@ -94,10 +98,12 @@ inline void SafeThreadOwnerBase::Start(SafeThread* thr) {
     delete newthr;
     return;
   }
-  std::thread([=]() {
+  std::thread stdThread([=]() {
     newthr->Main();
     delete newthr;
-  }).detach();
+  });
+  m_nativeHandle = stdThread.native_handle();
+  stdThread.detach();
 }
 
 inline void SafeThreadOwnerBase::Stop() {