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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef RUNTIME_VM_ZONE_H_ | 5 #ifndef RUNTIME_VM_ZONE_H_ |
6 #define RUNTIME_VM_ZONE_H_ | 6 #define RUNTIME_VM_ZONE_H_ |
7 | 7 |
8 #include "platform/utils.h" | 8 #include "platform/utils.h" |
9 #include "vm/allocation.h" | 9 #include "vm/allocation.h" |
10 #include "vm/handles.h" | 10 #include "vm/handles.h" |
| 11 #include "vm/json_stream.h" |
11 #include "vm/thread.h" | 12 #include "vm/thread.h" |
12 #include "vm/memory_region.h" | 13 #include "vm/memory_region.h" |
13 | 14 |
14 namespace dart { | 15 namespace dart { |
15 | 16 |
16 // Zones support very fast allocation of small chunks of memory. The | 17 // Zones support very fast allocation of small chunks of memory. The |
17 // chunks cannot be deallocated individually, but instead zones | 18 // chunks cannot be deallocated individually, but instead zones |
18 // support deallocating all chunks in one fast operation. | 19 // support deallocating all chunks in one fast operation. |
19 | 20 |
20 class Zone { | 21 class Zone { |
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58 // These calls are deprecated. Do not add further calls to these functions. | 59 // These calls are deprecated. Do not add further calls to these functions. |
59 // instead use OS::SCreate and OS::VSCreate. | 60 // instead use OS::SCreate and OS::VSCreate. |
60 // Make a zone-allocated string based on printf format and args. | 61 // Make a zone-allocated string based on printf format and args. |
61 char* PrintToString(const char* format, ...) PRINTF_ATTRIBUTE(2, 3); | 62 char* PrintToString(const char* format, ...) PRINTF_ATTRIBUTE(2, 3); |
62 char* VPrint(const char* format, va_list args); | 63 char* VPrint(const char* format, va_list args); |
63 | 64 |
64 // Compute the total size of this zone. This includes wasted space that is | 65 // Compute the total size of this zone. This includes wasted space that is |
65 // due to internal fragmentation in the segments. | 66 // due to internal fragmentation in the segments. |
66 intptr_t SizeInBytes() const; | 67 intptr_t SizeInBytes() const; |
67 | 68 |
| 69 // Computes the amount of space used in the zone. |
| 70 intptr_t UsedSizeInBytes() const { |
| 71 return SizeInBytes() - (limit_ - position_); |
| 72 } |
| 73 |
68 // Structure for managing handles allocation. | 74 // Structure for managing handles allocation. |
69 VMHandles* handles() { return &handles_; } | 75 VMHandles* handles() { return &handles_; } |
70 | 76 |
71 void VisitObjectPointers(ObjectPointerVisitor* visitor); | 77 void VisitObjectPointers(ObjectPointerVisitor* visitor); |
72 | 78 |
73 Zone* previous() const { return previous_; } | 79 Zone* previous() const { return previous_; } |
74 | 80 |
| 81 #ifndef PRODUCT |
| 82 void PrintJSON(JSONStream* stream) const; |
| 83 #endif |
| 84 |
75 private: | 85 private: |
76 Zone(); | 86 Zone(); |
77 ~Zone(); // Delete all memory associated with the zone. | 87 ~Zone(); // Delete all memory associated with the zone. |
78 | 88 |
79 // All pointers returned from AllocateUnsafe() and New() have this alignment. | 89 // All pointers returned from AllocateUnsafe() and New() have this alignment. |
80 static const intptr_t kAlignment = kDoubleSize; | 90 static const intptr_t kAlignment = kDoubleSize; |
81 | 91 |
82 // Default initial chunk size. | 92 // Default initial chunk size. |
83 static const intptr_t kInitialChunkSize = 1 * KB; | 93 static const intptr_t kInitialChunkSize = 1 * KB; |
84 | 94 |
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167 // Create an empty zone and set is at the current zone for the Thread. | 177 // Create an empty zone and set is at the current zone for the Thread. |
168 explicit StackZone(Thread* thread); | 178 explicit StackZone(Thread* thread); |
169 | 179 |
170 // Delete all memory associated with the zone. | 180 // Delete all memory associated with the zone. |
171 ~StackZone(); | 181 ~StackZone(); |
172 | 182 |
173 // Compute the total size of this zone. This includes wasted space that is | 183 // Compute the total size of this zone. This includes wasted space that is |
174 // due to internal fragmentation in the segments. | 184 // due to internal fragmentation in the segments. |
175 intptr_t SizeInBytes() const { return zone_.SizeInBytes(); } | 185 intptr_t SizeInBytes() const { return zone_.SizeInBytes(); } |
176 | 186 |
| 187 // Computes the used space in the zone. |
| 188 intptr_t UsedSizeInBytes() const { return zone_.UsedSizeInBytes(); } |
| 189 |
177 Zone* GetZone() { return &zone_; } | 190 Zone* GetZone() { return &zone_; } |
178 | 191 |
179 private: | 192 private: |
180 Zone zone_; | 193 Zone zone_; |
181 | 194 |
182 template <typename T> | 195 template <typename T> |
183 friend class GrowableArray; | 196 friend class GrowableArray; |
184 template <typename T> | 197 template <typename T> |
185 friend class ZoneGrowableArray; | 198 friend class ZoneGrowableArray; |
186 | 199 |
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252 if (old_data != 0) { | 265 if (old_data != 0) { |
253 memmove(reinterpret_cast<void*>(new_data), | 266 memmove(reinterpret_cast<void*>(new_data), |
254 reinterpret_cast<void*>(old_data), old_len * kElementSize); | 267 reinterpret_cast<void*>(old_data), old_len * kElementSize); |
255 } | 268 } |
256 return new_data; | 269 return new_data; |
257 } | 270 } |
258 | 271 |
259 } // namespace dart | 272 } // namespace dart |
260 | 273 |
261 #endif // RUNTIME_VM_ZONE_H_ | 274 #endif // RUNTIME_VM_ZONE_H_ |
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