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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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_ALLOCATION_H_ | 5 #ifndef RUNTIME_VM_ALLOCATION_H_ |
6 #define RUNTIME_VM_ALLOCATION_H_ | 6 #define RUNTIME_VM_ALLOCATION_H_ |
7 | 7 |
8 #include "platform/allocation.h" | 8 #include "platform/allocation.h" |
9 #include "platform/assert.h" | 9 #include "platform/assert.h" |
10 #include "vm/base_isolate.h" | 10 #include "vm/base_isolate.h" |
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43 private: | 43 private: |
44 void Init(Thread* thread); | 44 void Init(Thread* thread); |
45 | 45 |
46 Thread* thread_; | 46 Thread* thread_; |
47 StackResource* previous_; | 47 StackResource* previous_; |
48 | 48 |
49 DISALLOW_ALLOCATION(); | 49 DISALLOW_ALLOCATION(); |
50 DISALLOW_IMPLICIT_CONSTRUCTORS(StackResource); | 50 DISALLOW_IMPLICIT_CONSTRUCTORS(StackResource); |
51 }; | 51 }; |
52 | 52 |
53 | |
54 // Zone allocated objects cannot be individually deallocated, but have | 53 // Zone allocated objects cannot be individually deallocated, but have |
55 // to rely on the destructor of Zone which is called when the Zone | 54 // to rely on the destructor of Zone which is called when the Zone |
56 // goes out of scope to reclaim memory. | 55 // goes out of scope to reclaim memory. |
57 class ZoneAllocated { | 56 class ZoneAllocated { |
58 public: | 57 public: |
59 ZoneAllocated() {} | 58 ZoneAllocated() {} |
60 | 59 |
61 // Implicitly allocate the object in the current zone. | 60 // Implicitly allocate the object in the current zone. |
62 void* operator new(uword size); | 61 void* operator new(uword size); |
63 | 62 |
64 // Allocate the object in the given zone, which must be the current zone. | 63 // Allocate the object in the given zone, which must be the current zone. |
65 void* operator new(uword size, Zone* zone); | 64 void* operator new(uword size, Zone* zone); |
66 | 65 |
67 // Ideally, the delete operator should be protected instead of | 66 // Ideally, the delete operator should be protected instead of |
68 // public, but unfortunately the compiler sometimes synthesizes | 67 // public, but unfortunately the compiler sometimes synthesizes |
69 // (unused) destructors for classes derived from ZoneObject, which | 68 // (unused) destructors for classes derived from ZoneObject, which |
70 // require the operator to be visible. MSVC requires the delete | 69 // require the operator to be visible. MSVC requires the delete |
71 // operator to be public. | 70 // operator to be public. |
72 | 71 |
73 // Disallow explicit deallocation of nodes. Nodes can only be | 72 // Disallow explicit deallocation of nodes. Nodes can only be |
74 // deallocated by invoking DeleteAll() on the zone they live in. | 73 // deallocated by invoking DeleteAll() on the zone they live in. |
75 void operator delete(void* pointer) { UNREACHABLE(); } | 74 void operator delete(void* pointer) { UNREACHABLE(); } |
76 | 75 |
77 private: | 76 private: |
78 DISALLOW_COPY_AND_ASSIGN(ZoneAllocated); | 77 DISALLOW_COPY_AND_ASSIGN(ZoneAllocated); |
79 }; | 78 }; |
80 | 79 |
81 | |
82 // Within a NoSafepointScope, the thread must not reach any safepoint. Used | 80 // Within a NoSafepointScope, the thread must not reach any safepoint. Used |
83 // around code that manipulates raw object pointers directly without handles. | 81 // around code that manipulates raw object pointers directly without handles. |
84 #if defined(DEBUG) | 82 #if defined(DEBUG) |
85 class NoSafepointScope : public StackResource { | 83 class NoSafepointScope : public StackResource { |
86 public: | 84 public: |
87 NoSafepointScope(); | 85 NoSafepointScope(); |
88 ~NoSafepointScope(); | 86 ~NoSafepointScope(); |
89 | 87 |
90 private: | 88 private: |
91 DISALLOW_COPY_AND_ASSIGN(NoSafepointScope); | 89 DISALLOW_COPY_AND_ASSIGN(NoSafepointScope); |
92 }; | 90 }; |
93 #else // defined(DEBUG) | 91 #else // defined(DEBUG) |
94 class NoSafepointScope : public ValueObject { | 92 class NoSafepointScope : public ValueObject { |
95 public: | 93 public: |
96 NoSafepointScope() {} | 94 NoSafepointScope() {} |
97 | 95 |
98 private: | 96 private: |
99 DISALLOW_COPY_AND_ASSIGN(NoSafepointScope); | 97 DISALLOW_COPY_AND_ASSIGN(NoSafepointScope); |
100 }; | 98 }; |
101 #endif // defined(DEBUG) | 99 #endif // defined(DEBUG) |
102 | 100 |
103 } // namespace dart | 101 } // namespace dart |
104 | 102 |
105 #endif // RUNTIME_VM_ALLOCATION_H_ | 103 #endif // RUNTIME_VM_ALLOCATION_H_ |
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