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

src/v8.cc

 // Copyright 2012 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 18 matching lines @@
 
 #include "isolate.h"
 #include "elements.h"
 #include "bootstrapper.h"
 #include "debug.h"
 #include "deoptimizer.h"
 #include "heap-profiler.h"
 #include "hydrogen.h"
 #include "lithium-allocator.h"
 #include "log.h"
+#include "once.h"
+#include "platform.h"
 #include "runtime-profiler.h"
 #include "serialize.h"
 #include "store-buffer.h"
 
 namespace v8 {
 namespace internal {
 
-static Mutex* init_once_mutex = OS::CreateMutex();
-static bool init_once_called = false;
+V8_DECLARE_ONCE(init_once);
 
 bool V8::is_running_ = false;
 bool V8::has_been_set_up_ = false;
 bool V8::has_been_disposed_ = false;
 bool V8::has_fatal_error_ = false;
 bool V8::use_crankshaft_ = true;
 List<CallCompletedCallback>* V8::call_completed_callbacks_ = NULL;
 
-static Mutex* entropy_mutex = OS::CreateMutex();
+static LazyMutex entropy_mutex = LAZY_MUTEX_INITIALIZER;
+
 static EntropySource entropy_source;
 
 
 bool V8::Initialize(Deserializer* des) {
   FlagList::EnforceFlagImplications();
 
   InitializeOncePerProcess();
 
   // The current thread may not yet had entered an isolate to run.
   // Note the Isolate::Current() may be non-null because for various
@@ skipping 43 matching lines @@
   call_completed_callbacks_ = NULL;
 }
 
 
 static void seed_random(uint32_t* state) {
   for (int i = 0; i < 2; ++i) {
     if (FLAG_random_seed != 0) {
       state[i] = FLAG_random_seed;
     } else if (entropy_source != NULL) {
       uint32_t val;
-      ScopedLock lock(entropy_mutex);
+      ScopedLock lock(entropy_mutex.Pointer());
       entropy_source(reinterpret_cast<unsigned char*>(&val), sizeof(uint32_t));
       state[i] = val;
     } else {
       state[i] = random();
     }
   }
 }
 
 
 // Random number generator using George Marsaglia's MWC algorithm.
@@ skipping 99 matching lines @@
   // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
   static const double binary_million = 1048576.0;
   r.double_value = binary_million;
   r.uint64_t_value |= random_bits;
   r.double_value -= binary_million;
 
   HeapNumber::cast(heap_number)->set_value(r.double_value);
   return heap_number;
 }
 
-
-void V8::InitializeOncePerProcess() {
-  ScopedLock lock(init_once_mutex);
-  if (init_once_called) return;
-  init_once_called = true;
-
+void V8::InitializeOncePerProcessImpl() {
   // Set up the platform OS support.
   OS::SetUp();
 
   use_crankshaft_ = FLAG_crankshaft;
 
   if (Serializer::enabled()) {
     use_crankshaft_ = false;
   }
 
   CPU::SetUp();
   if (!CPU::SupportsCrankshaft()) {
     use_crankshaft_ = false;
   }
 
   RuntimeProfiler::GlobalSetup();
 
   ElementsAccessor::InitializeOncePerProcess();
 
   if (FLAG_stress_compaction) {
     FLAG_force_marking_deque_overflows = true;
     FLAG_gc_global = true;
     FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
   }
+
+  LOperand::SetUpCaches();
+}
+
+void V8::InitializeOncePerProcess() {
+  CallOnce(&init_once, &InitializeOncePerProcessImpl);
 }
 
 } }  // namespace v8::internal