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Issue 10640012: Add a second kind of HandleScope that ties the lifetime of Handles created in its scope to the life… (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Cleanup. Created 8 years, 5 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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951 const int kRecursionBudget = 100; 951 const int kRecursionBudget = 100;
952 do { 952 do {
953 failure = false; 953 failure = false;
954 len = Utf8LengthHelper( 954 len = Utf8LengthHelper(
955 *str, 0, str->length(), false, kRecursionBudget, &failure, &dummy); 955 *str, 0, str->length(), false, kRecursionBudget, &failure, &dummy);
956 if (failure) FlattenString(str); 956 if (failure) FlattenString(str);
957 } while (failure); 957 } while (failure);
958 return len; 958 return len;
959 } 959 }
960 960
961
962 DeferredHandleScope::DeferredHandleScope(Isolate* isolate)
963 : impl_(isolate->handle_scope_implementer()) {
964 impl_->BeginDeferredScope();
965 Object** new_next = impl_->GetSpareOrNewBlock();
966 Object** new_limit = &new_next[kHandleBlockSize];
967 impl_->blocks()->Add(new_next);
968
969 v8::ImplementationUtilities::HandleScopeData* data =
970 impl_->isolate()->handle_scope_data();
971 #ifdef DEBUG
972 prev_level_ = data->level;
973 #endif
974 data->level++;
975 prev_limit_ = data->limit;
976 prev_next_ = data->next;
977 data->next = new_next;
978 data->limit = new_limit;
979 }
980
Erik Corry 2012/06/27 10:28:15 Missing newline.
sanjoy 2012/06/27 11:17:09 Fixed.
981 DeferredHandleScope::~DeferredHandleScope() {
982 impl_->isolate()->handle_scope_data()->level--;
983 ASSERT(handles_detached_);
984 ASSERT(impl_->isolate()->handle_scope_data()->level == prev_level_);
985 }
986
987
988 DeferredHandles* DeferredHandleScope::Detach() {
989 DeferredHandles* deferred = impl_->Detach(prev_limit_);
990 v8::ImplementationUtilities::HandleScopeData* data =
991 impl_->isolate()->handle_scope_data();
992 data->next = prev_next_;
993 data->limit = prev_limit_;
994 #ifdef DEBUG
995 handles_detached_ = true;
996 #endif
997 return deferred;
998 }
999
1000
1001 CompilationHandleScope::CompilationHandleScope(CompilationInfo* info)
Erik Corry 2012/06/27 10:28:15 This should also go somewhere else (perhaps inline
sanjoy 2012/06/27 11:17:09 Moved to compiler.h
1002 : deferred_(info->isolate()), info_(info) {
1003 }
1004
1005
1006 CompilationHandleScope::~CompilationHandleScope() {
1007 info_->set_deferred_handles(deferred_.Detach());
1008 }
1009
1010
961 } } // namespace v8::internal 1011 } } // namespace v8::internal
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