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| 1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef V8_HEAP_SPACES_H_ | 5 #ifndef V8_HEAP_SPACES_H_ |
| 6 #define V8_HEAP_SPACES_H_ | 6 #define V8_HEAP_SPACES_H_ |
| 7 | 7 |
| 8 #include "src/allocation.h" | 8 #include "src/allocation.h" |
| 9 #include "src/base/atomicops.h" | 9 #include "src/base/atomicops.h" |
| 10 #include "src/base/bits.h" | 10 #include "src/base/bits.h" |
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| 1269 // Page::next_page() call. | 1269 // Page::next_page() call. |
| 1270 | 1270 |
| 1271 // An abstraction of allocation and relocation pointers in a page-structured | 1271 // An abstraction of allocation and relocation pointers in a page-structured |
| 1272 // space. | 1272 // space. |
| 1273 class AllocationInfo { | 1273 class AllocationInfo { |
| 1274 public: | 1274 public: |
| 1275 AllocationInfo() : top_(NULL), limit_(NULL) {} | 1275 AllocationInfo() : top_(NULL), limit_(NULL) {} |
| 1276 | 1276 |
| 1277 INLINE(void set_top(Address top)) { | 1277 INLINE(void set_top(Address top)) { |
| 1278 SLOW_DCHECK(top == NULL || | 1278 SLOW_DCHECK(top == NULL || |
| 1279 (reinterpret_cast<intptr_t>(top) & HeapObjectTagMask()) == 0); | 1279 (reinterpret_cast<intptr_t>(top) & kHeapObjectTagMask) == 0); |
| 1280 top_ = top; | 1280 top_ = top; |
| 1281 } | 1281 } |
| 1282 | 1282 |
| 1283 INLINE(Address top()) const { | 1283 INLINE(Address top()) const { |
| 1284 SLOW_DCHECK(top_ == NULL || | 1284 SLOW_DCHECK(top_ == NULL || |
| 1285 (reinterpret_cast<intptr_t>(top_) & HeapObjectTagMask()) == 0); | 1285 (reinterpret_cast<intptr_t>(top_) & kHeapObjectTagMask) == 0); |
| 1286 return top_; | 1286 return top_; |
| 1287 } | 1287 } |
| 1288 | 1288 |
| 1289 Address* top_address() { return &top_; } | 1289 Address* top_address() { return &top_; } |
| 1290 | 1290 |
| 1291 INLINE(void set_limit(Address limit)) { | 1291 INLINE(void set_limit(Address limit)) { |
| 1292 SLOW_DCHECK(limit == NULL || | 1292 SLOW_DCHECK(limit == NULL || |
| 1293 (reinterpret_cast<intptr_t>(limit) & HeapObjectTagMask()) == 0); | 1293 (reinterpret_cast<intptr_t>(limit) & kHeapObjectTagMask) == 0); |
| 1294 limit_ = limit; | 1294 limit_ = limit; |
| 1295 } | 1295 } |
| 1296 | 1296 |
| 1297 INLINE(Address limit()) const { | 1297 INLINE(Address limit()) const { |
| 1298 SLOW_DCHECK(limit_ == NULL || | 1298 SLOW_DCHECK(limit_ == NULL || |
| 1299 (reinterpret_cast<intptr_t>(limit_) & HeapObjectTagMask()) == | 1299 (reinterpret_cast<intptr_t>(limit_) & kHeapObjectTagMask) == |
| 1300 0); | 1300 0); |
| 1301 return limit_; | 1301 return limit_; |
| 1302 } | 1302 } |
| 1303 | 1303 |
| 1304 Address* limit_address() { return &limit_; } | 1304 Address* limit_address() { return &limit_; } |
| 1305 | 1305 |
| 1306 #ifdef DEBUG | 1306 #ifdef DEBUG |
| 1307 bool VerifyPagedAllocation() { | 1307 bool VerifyPagedAllocation() { |
| 1308 return (Page::FromAllocationTop(top_) == Page::FromAllocationTop(limit_)) && | 1308 return (Page::FromAllocationTop(top_) == Page::FromAllocationTop(limit_)) && |
| 1309 (top_ <= limit_); | 1309 (top_ <= limit_); |
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| 2876 count = 0; | 2876 count = 0; |
| 2877 } | 2877 } |
| 2878 // Must be small, since an iteration is used for lookup. | 2878 // Must be small, since an iteration is used for lookup. |
| 2879 static const int kMaxComments = 64; | 2879 static const int kMaxComments = 64; |
| 2880 }; | 2880 }; |
| 2881 #endif | 2881 #endif |
| 2882 } | 2882 } |
| 2883 } // namespace v8::internal | 2883 } // namespace v8::internal |
| 2884 | 2884 |
| 2885 #endif // V8_HEAP_SPACES_H_ | 2885 #endif // V8_HEAP_SPACES_H_ |
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