[Isolates] Statics 7: ExternalReference*/Simulator/dtoa...

src/conversions.cc

Index: src/conversions.cc
===================================================================
--- src/conversions.cc	(revision 5004)
+++ src/conversions.cc	(working copy)
@@ -1154,4 +1154,23 @@
 }
 
 
+static Mutex* dtoa_lock_one = OS::CreateMutex();
+static Mutex* dtoa_lock_zero = OS::CreateMutex();
+
+
 } }  // namespace v8::internal
+
+
+extern "C" {
+void ACQUIRE_DTOA_LOCK(int n) {
+  ASSERT(n == 0 || n == 1);
+  (n == 0 ? v8::internal::dtoa_lock_zero : v8::internal::dtoa_lock_one)->Lock();
+}
+
+
+void FREE_DTOA_LOCK(int n) {
+  ASSERT(n == 0 || n == 1);
+  (n == 0 ? v8::internal::dtoa_lock_zero : v8::internal::dtoa_lock_one)->
+      Unlock();
+}
+}