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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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173 | 173 |
174 // ZoneScopes keep track of the current parsing and compilation | 174 // ZoneScopes keep track of the current parsing and compilation |
175 // nesting and cleans up generated ASTs in the Zone when exiting the | 175 // nesting and cleans up generated ASTs in the Zone when exiting the |
176 // outer-most scope. | 176 // outer-most scope. |
177 class ZoneScope BASE_EMBEDDED { | 177 class ZoneScope BASE_EMBEDDED { |
178 public: | 178 public: |
179 explicit ZoneScope(ZoneScopeMode mode) : mode_(mode) { | 179 explicit ZoneScope(ZoneScopeMode mode) : mode_(mode) { |
180 nesting_++; | 180 nesting_++; |
181 } | 181 } |
182 | 182 |
183 virtual ~ZoneScope() { | 183 ~ZoneScope() { |
184 if (ShouldDeleteOnExit()) Zone::DeleteAll(); | 184 if (--nesting_ == 0 && mode_ == DELETE_ON_EXIT) Zone::DeleteAll(); |
185 --nesting_; | |
186 } | |
187 | |
188 bool ShouldDeleteOnExit() { | |
189 return nesting_ == 1 && mode_ == DELETE_ON_EXIT; | |
190 } | 185 } |
191 | 186 |
192 // For ZoneScopes that do not delete on exit by default, call this | 187 // For ZoneScopes that do not delete on exit by default, call this |
193 // method to request deletion on exit. | 188 // method to request deletion on exit. |
194 void DeleteOnExit() { | 189 void DeleteOnExit() { |
195 mode_ = DELETE_ON_EXIT; | 190 mode_ = DELETE_ON_EXIT; |
196 } | 191 } |
197 | 192 |
198 static int nesting() { return nesting_; } | 193 static int nesting() { return nesting_; } |
199 | 194 |
200 private: | 195 private: |
201 ZoneScopeMode mode_; | 196 ZoneScopeMode mode_; |
202 static int nesting_; | 197 static int nesting_; |
203 }; | 198 }; |
204 | 199 |
205 | 200 |
206 } } // namespace v8::internal | 201 } } // namespace v8::internal |
207 | 202 |
208 #endif // V8_ZONE_H_ | 203 #endif // V8_ZONE_H_ |
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