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

src/platform.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 61 matching lines @@
 int strncasecmp(const char* s1, const char* s2, int n);
 
 #endif  // _MSC_VER
 
 // Random is missing on both Visual Studio and MinGW.
 int random();
 
 #endif  // WIN32
 
 #include "atomicops.h"
+#include "lazy-instance.h"
 #include "platform-tls.h"
 #include "utils.h"
 #include "v8globals.h"
 
 namespace v8 {
 namespace internal {
 
 // Use AtomicWord for a machine-sized pointer. It is assumed that
 // reads and writes of naturally aligned values of this type are atomic.
 typedef intptr_t AtomicWord;
@@ skipping 429 matching lines @@
 
   // Unlocks the given mutex. The mutex is assumed to be locked and owned by
   // the calling thread on entrance.
   virtual int Unlock() = 0;
 
   // Tries to lock the given mutex. Returns whether the mutex was
   // successfully locked.
   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
 //
 // Stack-allocated ScopedLocks provide block-scoped locking and
 // unlocking of a mutex.
 class ScopedLock {
  public:
   explicit ScopedLock(Mutex* mutex): mutex_(mutex) {
     ASSERT(mutex_ != NULL);
@@ skipping 29 matching lines @@
   // Suspends the calling thread until the counter is non zero or the timeout
   // time has passed. If timeout happens the return value is false and the
   // counter is unchanged. Otherwise the semaphore counter is decremented and
   // true is returned. The timeout value is specified in microseconds.
   virtual bool Wait(int timeout) = 0;
 
   // Increments the semaphore counter.
   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
 //
 
 class Socket {
  public:
   virtual ~Socket() {}
 
   // Server initialization.
@@ skipping 113 matching lines @@
   Atomic32 active_;
   PlatformData* data_;  // Platform specific data.
   int samples_taken_;  // Counts stack samples taken.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_