Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/lib/Support/Windows/Mutex.inc

@@ -0,0 +1,57 @@
+//===- llvm/Support/Win32/Mutex.inc - Win32 Mutex Implementation -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Win32 specific (non-pthread) Mutex class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic Win32 code that
+//===          is guaranteed to work on *all* Win32 variants.
+//===----------------------------------------------------------------------===//
+
+#include "WindowsSupport.h"
+#include "llvm/Support/Mutex.h"
+
+namespace llvm {
+
+sys::MutexImpl::MutexImpl(bool /*recursive*/)
+{
+  data_ = new CRITICAL_SECTION;
+  InitializeCriticalSection((LPCRITICAL_SECTION)data_);
+}
+
+sys::MutexImpl::~MutexImpl()
+{
+  DeleteCriticalSection((LPCRITICAL_SECTION)data_);
+  delete (LPCRITICAL_SECTION)data_;
+  data_ = 0;
+}
+
+bool
+sys::MutexImpl::acquire()
+{
+  EnterCriticalSection((LPCRITICAL_SECTION)data_);
+  return true;
+}
+
+bool
+sys::MutexImpl::release()
+{
+  LeaveCriticalSection((LPCRITICAL_SECTION)data_);
+  return true;
+}
+
+bool
+sys::MutexImpl::tryacquire()
+{
+  return TryEnterCriticalSection((LPCRITICAL_SECTION)data_);
+}
+
+}