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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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23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 // | 27 // |
28 | 28 |
29 #ifndef V8_HANDLES_INL_H_ | 29 #ifndef V8_HANDLES_INL_H_ |
30 #define V8_HANDLES_INL_H_ | 30 #define V8_HANDLES_INL_H_ |
31 | 31 |
32 #include "api.h" | 32 #include "api.h" |
33 #include "apiutils.h" | |
34 #include "handles.h" | 33 #include "handles.h" |
35 #include "heap.h" | 34 #include "heap.h" |
36 #include "isolate.h" | 35 #include "isolate.h" |
37 | 36 |
38 namespace v8 { | 37 namespace v8 { |
39 namespace internal { | 38 namespace internal { |
40 | 39 |
41 template<typename T> | 40 template<typename T> |
42 Handle<T>::Handle(T* obj) { | 41 Handle<T>::Handle(T* obj) { |
43 ASSERT(!obj->IsFailure()); | 42 ASSERT(!obj->IsFailure()); |
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103 if (heap_object->IsInternalizedString()) return true; | 102 if (heap_object->IsInternalizedString()) return true; |
104 return !heap->isolate()->IsDeferredHandle(handle); | 103 return !heap->isolate()->IsDeferredHandle(handle); |
105 } | 104 } |
106 return true; | 105 return true; |
107 } | 106 } |
108 #endif | 107 #endif |
109 | 108 |
110 | 109 |
111 | 110 |
112 HandleScope::HandleScope(Isolate* isolate) { | 111 HandleScope::HandleScope(Isolate* isolate) { |
113 v8::ImplementationUtilities::HandleScopeData* current = | 112 HandleScopeData* current = isolate->handle_scope_data(); |
114 isolate->handle_scope_data(); | |
115 isolate_ = isolate; | 113 isolate_ = isolate; |
116 prev_next_ = current->next; | 114 prev_next_ = current->next; |
117 prev_limit_ = current->limit; | 115 prev_limit_ = current->limit; |
118 current->level++; | 116 current->level++; |
119 } | 117 } |
120 | 118 |
121 | 119 |
122 HandleScope::~HandleScope() { | 120 HandleScope::~HandleScope() { |
123 CloseScope(isolate_, prev_next_, prev_limit_); | 121 CloseScope(isolate_, prev_next_, prev_limit_); |
124 } | 122 } |
125 | 123 |
126 | 124 |
127 void HandleScope::CloseScope(Isolate* isolate, | 125 void HandleScope::CloseScope(Isolate* isolate, |
128 Object** prev_next, | 126 Object** prev_next, |
129 Object** prev_limit) { | 127 Object** prev_limit) { |
130 v8::ImplementationUtilities::HandleScopeData* current = | 128 HandleScopeData* current = isolate->handle_scope_data(); |
131 isolate->handle_scope_data(); | |
132 | 129 |
133 std::swap(current->next, prev_next); | 130 std::swap(current->next, prev_next); |
134 current->level--; | 131 current->level--; |
135 if (current->limit != prev_limit) { | 132 if (current->limit != prev_limit) { |
136 current->limit = prev_limit; | 133 current->limit = prev_limit; |
137 DeleteExtensions(isolate); | 134 DeleteExtensions(isolate); |
138 #ifdef ENABLE_HANDLE_ZAPPING | 135 #ifdef ENABLE_HANDLE_ZAPPING |
139 ZapRange(current->next, prev_limit); | 136 ZapRange(current->next, prev_limit); |
140 } else { | 137 } else { |
141 ZapRange(current->next, prev_next); | 138 ZapRange(current->next, prev_next); |
142 #endif | 139 #endif |
143 } | 140 } |
144 } | 141 } |
145 | 142 |
146 | 143 |
147 template <typename T> | 144 template <typename T> |
148 Handle<T> HandleScope::CloseAndEscape(Handle<T> handle_value) { | 145 Handle<T> HandleScope::CloseAndEscape(Handle<T> handle_value) { |
149 v8::ImplementationUtilities::HandleScopeData* current = | 146 HandleScopeData* current = isolate_->handle_scope_data(); |
150 isolate_->handle_scope_data(); | |
151 | 147 |
152 T* value = *handle_value; | 148 T* value = *handle_value; |
153 // Throw away all handles in the current scope. | 149 // Throw away all handles in the current scope. |
154 CloseScope(isolate_, prev_next_, prev_limit_); | 150 CloseScope(isolate_, prev_next_, prev_limit_); |
155 // Allocate one handle in the parent scope. | 151 // Allocate one handle in the parent scope. |
156 ASSERT(current->level > 0); | 152 ASSERT(current->level > 0); |
157 Handle<T> result(CreateHandle<T>(isolate_, value)); | 153 Handle<T> result(CreateHandle<T>(isolate_, value)); |
158 // Reinitialize the current scope (so that it's ready | 154 // Reinitialize the current scope (so that it's ready |
159 // to be used or closed again). | 155 // to be used or closed again). |
160 prev_next_ = current->next; | 156 prev_next_ = current->next; |
161 prev_limit_ = current->limit; | 157 prev_limit_ = current->limit; |
162 current->level++; | 158 current->level++; |
163 return result; | 159 return result; |
164 } | 160 } |
165 | 161 |
166 | 162 |
167 template <typename T> | 163 template <typename T> |
168 T** HandleScope::CreateHandle(Isolate* isolate, T* value) { | 164 T** HandleScope::CreateHandle(Isolate* isolate, T* value) { |
169 ASSERT(AllowHandleAllocation::IsAllowed()); | 165 ASSERT(AllowHandleAllocation::IsAllowed()); |
170 v8::ImplementationUtilities::HandleScopeData* current = | 166 HandleScopeData* current = isolate->handle_scope_data(); |
171 isolate->handle_scope_data(); | |
172 | 167 |
173 internal::Object** cur = current->next; | 168 internal::Object** cur = current->next; |
174 if (cur == current->limit) cur = Extend(isolate); | 169 if (cur == current->limit) cur = Extend(isolate); |
175 // Update the current next field, set the value in the created | 170 // Update the current next field, set the value in the created |
176 // handle, and return the result. | 171 // handle, and return the result. |
177 ASSERT(cur < current->limit); | 172 ASSERT(cur < current->limit); |
178 current->next = cur + 1; | 173 current->next = cur + 1; |
179 | 174 |
180 T** result = reinterpret_cast<T**>(cur); | 175 T** result = reinterpret_cast<T**>(cur); |
181 *result = value; | 176 *result = value; |
182 return result; | 177 return result; |
183 } | 178 } |
184 | 179 |
185 | 180 |
186 #ifdef DEBUG | 181 #ifdef DEBUG |
187 inline SealHandleScope::SealHandleScope(Isolate* isolate) : isolate_(isolate) { | 182 inline SealHandleScope::SealHandleScope(Isolate* isolate) : isolate_(isolate) { |
188 // Make sure the current thread is allowed to create handles to begin with. | 183 // Make sure the current thread is allowed to create handles to begin with. |
189 CHECK(AllowHandleAllocation::IsAllowed()); | 184 CHECK(AllowHandleAllocation::IsAllowed()); |
190 v8::ImplementationUtilities::HandleScopeData* current = | 185 HandleScopeData* current = isolate_->handle_scope_data(); |
191 isolate_->handle_scope_data(); | |
192 // Shrink the current handle scope to make it impossible to do | 186 // Shrink the current handle scope to make it impossible to do |
193 // handle allocations without an explicit handle scope. | 187 // handle allocations without an explicit handle scope. |
194 limit_ = current->limit; | 188 limit_ = current->limit; |
195 current->limit = current->next; | 189 current->limit = current->next; |
196 level_ = current->level; | 190 level_ = current->level; |
197 current->level = 0; | 191 current->level = 0; |
198 } | 192 } |
199 | 193 |
200 | 194 |
201 inline SealHandleScope::~SealHandleScope() { | 195 inline SealHandleScope::~SealHandleScope() { |
202 // Restore state in current handle scope to re-enable handle | 196 // Restore state in current handle scope to re-enable handle |
203 // allocations. | 197 // allocations. |
204 v8::ImplementationUtilities::HandleScopeData* current = | 198 HandleScopeData* current = isolate_->handle_scope_data(); |
205 isolate_->handle_scope_data(); | |
206 ASSERT_EQ(0, current->level); | 199 ASSERT_EQ(0, current->level); |
207 current->level = level_; | 200 current->level = level_; |
208 ASSERT_EQ(current->next, current->limit); | 201 ASSERT_EQ(current->next, current->limit); |
209 current->limit = limit_; | 202 current->limit = limit_; |
210 } | 203 } |
211 | 204 |
212 #endif | 205 #endif |
213 | 206 |
214 } } // namespace v8::internal | 207 } } // namespace v8::internal |
215 | 208 |
216 #endif // V8_HANDLES_INL_H_ | 209 #endif // V8_HANDLES_INL_H_ |
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