The TargetData is not used for the isPowerOfTwo determination. It has never

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

diff --git a/include/llvm/Support/Threading.h b/include/llvm/Support/Threading.h
index bac11a23800a259e35fa1c67d587e62149064dc0..9017afb8903824534335a9d08948647b3cca4671 100644 (file)
--- a/include/llvm/Support/Threading.h
+++ b/include/llvm/Support/Threading.h
@@ -11,35 +11,49 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_SUPPORT_THREADING_H
-#define LLVM_SUPPORT_THREADING_H
+#ifndef LLVM_SYSTEM_THREADING_H
+#define LLVM_SYSTEM_THREADING_H
 
 namespace llvm {
   /// llvm_start_multithreaded - Allocate and initialize structures needed to
   /// make LLVM safe for multithreading.  The return value indicates whether
   /// multithreaded initialization succeeded.  LLVM will still be operational
-  /// on "failed" return, and will still be safe for hosting threading 
+  /// on "failed" return, and will still be safe for hosting threading
   /// applications in the JIT, but will not be safe for concurrent calls to the
   /// LLVM APIs.
   /// THIS MUST EXECUTE IN ISOLATION FROM ALL OTHER LLVM API CALLS.
   bool llvm_start_multithreaded();
-  
+
   /// llvm_stop_multithreaded - Deallocate structures necessary to make LLVM
   /// safe for multithreading.
   /// THIS MUST EXECUTE IN ISOLATION FROM ALL OTHER LLVM API CALLS.
   void llvm_stop_multithreaded();
-  
+
   /// llvm_is_multithreaded - Check whether LLVM is executing in thread-safe
   /// mode or not.
   bool llvm_is_multithreaded();
-  
+
   /// acquire_global_lock - Acquire the global lock.  This is a no-op if called
   /// before llvm_start_multithreaded().
   void llvm_acquire_global_lock();
-  
+
   /// release_global_lock - Release the global lock.  This is a no-op if called
   /// before llvm_start_multithreaded().
   void llvm_release_global_lock();
+
+  /// llvm_execute_on_thread - Execute the given \p UserFn on a separate
+  /// thread, passing it the provided \p UserData.
+  ///
+  /// 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
+  /// so where system support is available.
+  ///
+  /// \param UserFn - The callback to execute.
+  /// \param UserData - An argument to pass to the callback function.
+  /// \param RequestedStackSize - If non-zero, a requested size (in bytes) for
+  /// the thread stack.
+  void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
+                              unsigned RequestedStackSize = 0);
 }
 
 #endif