vendor/llvm/llvm-trunk-r366426

1 files changed, 19 insertions, 4 deletions

diff --git a/include/llvm/Support/Threading.h b/include/llvm/Support/Threading.h
index ba7ece5e72ba..46d413dc487b 100644
--- a/include/llvm/Support/Threading.h
+++ b/include/llvm/Support/Threading.h
@@ -1,9 +1,8 @@
 //===-- llvm/Support/Threading.h - Control multithreading mode --*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -33,6 +32,9 @@
 // implementations like libstdc++ are known to have problems on NetBSD,
 // OpenBSD and PowerPC.
 #define LLVM_THREADING_USE_STD_CALL_ONCE 1
+#elif defined(LLVM_ON_UNIX) &&                                                 \
+    ((defined(__ppc__) || defined(__PPC__)) && defined(__LITTLE_ENDIAN__))
+#define LLVM_THREADING_USE_STD_CALL_ONCE 1
 #else
 #define LLVM_THREADING_USE_STD_CALL_ONCE 0
 #endif
@@ -165,6 +167,19 @@ void llvm_execute_on_thread(void (*UserFn)(void *), void *UserData,
   /// purposes, and as with setting a thread's name no indication of whether
   /// the operation succeeded or failed is returned.
   void get_thread_name(SmallVectorImpl<char> &Name);
+
+  enum class ThreadPriority {
+    Background = 0,
+    Default = 1,
+  };
+  /// If priority is Background tries to lower current threads priority such
+  /// that it does not affect foreground tasks significantly. Can be used for
+  /// long-running, latency-insensitive tasks to make sure cpu is not hogged by
+  /// this task.
+  /// If the priority is default tries to restore current threads priority to
+  /// default scheduling priority.
+  enum class SetThreadPriorityResult { FAILURE, SUCCESS };
+  SetThreadPriorityResult set_thread_priority(ThreadPriority Priority);
 }
 
 #endif