expose AssertNoAllocation to api

src/heap-inl.h

 // 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 632 matching lines @@
 
 
 #ifdef DEBUG
 
 inline bool Heap::allow_allocation(bool new_state) {
   bool old = allocation_allowed_;
   allocation_allowed_ = new_state;
   return old;
 }
 
+inline void Heap::set_allow_allocation(bool allocation_allowed) {
+  allocation_allowed_ = allocation_allowed;
+}
+
 #endif
 
 
 void ExternalStringTable::AddString(String* string) {
   ASSERT(string->IsExternalString());
   if (heap_->InNewSpace(string)) {
     new_space_strings_.Add(string);
   } else {
     old_space_strings_.Add(string);
   }
@@ skipping 194 matching lines @@
 
 
 DisallowAllocationFailure::~DisallowAllocationFailure() {
 #ifdef DEBUG
   HEAP->disallow_allocation_failure_ = old_state_;
 #endif
 }
 
 
 #ifdef DEBUG
-AssertNoAllocation::AssertNoAllocation() {
-  Isolate* isolate = ISOLATE;
-  active_ = !isolate->optimizing_compiler_thread()->IsOptimizerThread();
-  if (active_) {
-    old_state_ = isolate->heap()->allow_allocation(false);
+bool EnterAllocationScope(Isolate* isolate, bool allow_allocation) {
+  bool active = !isolate->optimizing_compiler_thread()->IsOptimizerThread();
+  bool last_state = isolate->heap()->IsAllocationAllowed();
+  if (active) {
+    isolate->heap()->set_allow_allocation(allow_allocation);
   }
+  return last_state;
 }
 
 
-AssertNoAllocation::~AssertNoAllocation() {
-  if (active_) HEAP->allow_allocation(old_state_);
+void ExitAllocationScope(Isolate* isolate, bool last_state) {
+  isolate->heap()->set_allow_allocation(last_state);
 }
 
 
-DisableAssertNoAllocation::DisableAssertNoAllocation() {
-  Isolate* isolate = ISOLATE;
-  active_ = !isolate->optimizing_compiler_thread()->IsOptimizerThread();
-  if (active_) {
-    old_state_ = isolate->heap()->allow_allocation(true);
-  }
+AssertNoAllocation::AssertNoAllocation()
+    : last_state_(EnterAllocationScope(ISOLATE, false)) {
 }
 
+AssertNoAllocation::~AssertNoAllocation() {
+  ExitAllocationScope(ISOLATE, last_state_);
+}
+
+DisableAssertNoAllocation::DisableAssertNoAllocation()
+  : last_state_(EnterAllocationScope(ISOLATE, true)) {
+}
 
 DisableAssertNoAllocation::~DisableAssertNoAllocation() {
-  if (active_) HEAP->allow_allocation(old_state_);
+  ExitAllocationScope(ISOLATE, last_state_);
 }
-
 #else
 
 AssertNoAllocation::AssertNoAllocation() { }
 AssertNoAllocation::~AssertNoAllocation() { }
 DisableAssertNoAllocation::DisableAssertNoAllocation() { }
 DisableAssertNoAllocation::~DisableAssertNoAllocation() { }
 
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_