Landing for pliard@chromium.org: Remove static initializers in v8.

src/platform.h

Index: src/platform.h
===================================================================
--- src/platform.h	(revision 11005)
+++ src/platform.h	(working copy)
@@ -79,6 +79,7 @@
 #endif  // WIN32
 
 #include "atomicops.h"
+#include "lazy-instance.h"
 #include "platform-tls.h"
 #include "utils.h"
 #include "v8globals.h"
@@ -528,7 +529,25 @@
   virtual bool TryLock() = 0;
 };
 
+struct CreateMutexTrait {
+  static Mutex* Create() {
+    return OS::CreateMutex();
+  }
+};
 
+// POD Mutex initialized lazily (i.e. the first time Pointer() is called).
+// Usage:
+//   static LazyMutex my_mutex = LAZY_MUTEX_INITIALIZER;
+//
+//   void my_function() {
+//     ScopedLock my_lock(my_mutex.Pointer());
+//     // Do something.
+//   }
+//
+typedef LazyDynamicInstance<Mutex, CreateMutexTrait>::type LazyMutex;
+
+#define LAZY_MUTEX_INITIALIZER LAZY_DYNAMIC_INSTANCE_INITIALIZER
+
 // ----------------------------------------------------------------------------
 // ScopedLock
 //
@@ -577,7 +596,31 @@
   virtual void Signal() = 0;
 };
 
+template <int InitialValue>
+struct CreateSemaphoreTrait {
+  static Semaphore* Create() {
+    return OS::CreateSemaphore(InitialValue);
+  }
+};
 
+// POD Semaphore initialized lazily (i.e. the first time Pointer() is called).
+// Usage:
+//   // The following semaphore starts at 0.
+//   static LazySemaphore<0>::type my_semaphore = LAZY_SEMAPHORE_INITIALIZER;
+//
+//   void my_function() {
+//     // Do something with my_semaphore.Pointer().
+//   }
+//
+template <int InitialValue>
+struct LazySemaphore {
+  typedef typename LazyDynamicInstance<
+      Semaphore, CreateSemaphoreTrait<InitialValue> >::type type;
+};
+
+#define LAZY_SEMAPHORE_INITIALIZER LAZY_DYNAMIC_INSTANCE_INITIALIZER
+
+
 // ----------------------------------------------------------------------------
 // Socket
 //