Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)

[oota-llvm.git] / include / llvm / Support / Threading.h

diff --git a/include/llvm/Support/Threading.h b/include/llvm/Support/Threading.h
index cc9727031fddd656dc4353eddc6ca1d5ac1b600a..3cca1d6a9913f82aea1a6146f8f6474e81077ab0 100644 (file)
--- a/include/llvm/Support/Threading.h
+++ b/include/llvm/Support/Threading.h
@@ -15,17 +15,14 @@
 #ifndef LLVM_SUPPORT_THREADING_H
 #define LLVM_SUPPORT_THREADING_H
 
-#if !defined(__MINGW__)
-#include <mutex>
-#endif
-
 namespace llvm {
   /// Returns true if LLVM is compiled with support for multi-threading, and
   /// false otherwise.
   bool llvm_is_multithreaded();
 
   /// llvm_execute_on_thread - Execute the given \p UserFn on a separate
-  /// thread, passing it the provided \p UserData.
+  /// thread, passing it the provided \p UserData and waits for thread 
+  /// completion.
   ///
   /// This function does not guarantee that the code will actually be executed
   /// on a separate thread or honoring the requested stack size, but tries to do
@@ -37,33 +34,6 @@ namespace llvm {
   /// the thread stack.
   void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
                               unsigned RequestedStackSize = 0);
-
-/// \brief Execute the function specified as a template parameter once.
-///
-/// Calls \p UserFn once ever. The call uniqueness is based on the address of
-/// the function passed in via the template arguement. This means no matter how
-/// many times you call llvm_call_once<foo>() in the same or different
-/// locations, foo will only be called once.
-///
-/// Typical usage:
-/// \code
-///   void foo() {...};
-///   ...
-///   llvm_call_once<foo>();
-/// \endcode
-///
-/// \tparam UserFn Function to call once.
-template <void (*UserFn)(void)> void llvm_call_once() {
-#if !defined(__MINGW__)
-  static std::once_flag flag;
-  std::call_once(flag, UserFn);
-#else
-  struct InitOnceWrapper {
-    InitOnceWrapper() { UserFn(); }
-  };
-  static InitOnceWrapper InitOnceVar;
-#endif
-}
 }
 
 #endif