Make NoReloadScope thread safe

runtime/vm/atomic_win.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ATOMIC_WIN_H_
 #define VM_ATOMIC_WIN_H_
 
 #if !defined VM_ATOMIC_H_
 #error Do not include atomic_win.h directly. Use atomic.h instead.
 #endif
@@ skipping 10 matching lines @@
       InterlockedIncrement64(reinterpret_cast<LONGLONG*>(p))) - 1;
 #elif defined(HOST_ARCH_IA32)
   return static_cast<uintptr_t>(
       InterlockedIncrement(reinterpret_cast<LONG*>(p))) - 1;
 #else
 #error Unsupported host architecture.
 #endif
 }
 
 
+inline intptr_t AtomicOperations::FetchAndIncrement(intptr_t* p) {
+#if defined(HOST_ARCH_X64)
+  return static_cast<intptr_t>(
+      InterlockedIncrement64(reinterpret_cast<LONGLONG*>(p))) - 1;
+#elif defined(HOST_ARCH_IA32)
+  return static_cast<intptr_t>(
+      InterlockedIncrement(reinterpret_cast<LONG*>(p))) - 1;
+#else
+#error Unsupported host architecture.
+#endif
+}
+
+
 inline void AtomicOperations::IncrementBy(intptr_t* p, intptr_t value) {
 #if defined(HOST_ARCH_X64)
   InterlockedExchangeAdd64(reinterpret_cast<LONGLONG*>(p),
                            static_cast<LONGLONG>(value));
 #elif defined(HOST_ARCH_IA32)
   InterlockedExchangeAdd(reinterpret_cast<LONG*>(p),
                          static_cast<LONG>(value));
 #else
 #error Unsupported host architecture.
 #endif
@@ skipping 16 matching lines @@
       InterlockedDecrement64(reinterpret_cast<LONGLONG*>(p))) + 1;
 #elif defined(HOST_ARCH_IA32)
   return static_cast<uintptr_t>(
       InterlockedDecrement(reinterpret_cast<LONG*>(p))) + 1;
 #else
 #error Unsupported host architecture.
 #endif
 }
 
 
+inline intptr_t AtomicOperations::FetchAndDecrement(intptr_t* p) {
+#if defined(HOST_ARCH_X64)
+  return static_cast<intptr_t>(
+      InterlockedDecrement64(reinterpret_cast<LONGLONG*>(p))) + 1;
+#elif defined(HOST_ARCH_IA32)
+  return static_cast<intptr_t>(
+      InterlockedDecrement(reinterpret_cast<LONG*>(p))) + 1;
+#else
+#error Unsupported host architecture.
+#endif
+}
+
+
 inline void AtomicOperations::DecrementBy(intptr_t* p, intptr_t value) {
 #if defined(HOST_ARCH_X64)
   InterlockedExchangeAdd64(reinterpret_cast<LONGLONG*>(p),
                            static_cast<LONGLONG>(-value));
 #elif defined(HOST_ARCH_IA32)
   InterlockedExchangeAdd(reinterpret_cast<LONG*>(p),
                          static_cast<LONG>(-value));
 #else
 #error Unsupported host architecture.
 #endif
@@ skipping 28 matching lines @@
                                  static_cast<LONG>(old_value)));
 #else
 #error Unsupported host architecture.
 #endif
 }
 #endif  // !defined(USING_SIMULATOR)
 
 }  // namespace dart
 
 #endif  // VM_ATOMIC_WIN_H_