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| 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 |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 #ifndef VM_BASE_ISOLATE_H_ |
| 6 #define VM_BASE_ISOLATE_H_ |
| 7 |
| 8 namespace dart { |
| 9 |
| 10 class HandleScope; |
| 11 class StackResource; |
| 12 class Zone; |
| 13 |
| 14 // A BaseIsolate contains just enough functionality to allocate |
| 15 // StackResources. This allows us to inline the StackResource |
| 16 // constructor/destructor for performance. |
| 17 class BaseIsolate { |
| 18 public: |
| 19 StackResource* top_resource() const { return top_resource_; } |
| 20 void set_top_resource(StackResource* value) { top_resource_ = value; } |
| 21 |
| 22 Zone* current_zone() const { return current_zone_; } |
| 23 void set_current_zone(Zone* zone) { current_zone_ = zone; } |
| 24 |
| 25 HandleScope* top_handle_scope() const { |
| 26 #if defined(DEBUG) |
| 27 return top_handle_scope_; |
| 28 #else |
| 29 return 0; |
| 30 #endif |
| 31 } |
| 32 |
| 33 void set_top_handle_scope(HandleScope* handle_scope) { |
| 34 #if defined(DEBUG) |
| 35 top_handle_scope_ = handle_scope; |
| 36 #endif |
| 37 } |
| 38 |
| 39 int32_t no_handle_scope_depth() const { |
| 40 #if defined(DEBUG) |
| 41 return no_handle_scope_depth_; |
| 42 #else |
| 43 return 0; |
| 44 #endif |
| 45 } |
| 46 |
| 47 void IncrementNoHandleScopeDepth() { |
| 48 #if defined(DEBUG) |
| 49 ASSERT(no_handle_scope_depth_ < INT_MAX); |
| 50 no_handle_scope_depth_ += 1; |
| 51 #endif |
| 52 } |
| 53 |
| 54 void DecrementNoHandleScopeDepth() { |
| 55 #if defined(DEBUG) |
| 56 ASSERT(no_handle_scope_depth_ > 0); |
| 57 no_handle_scope_depth_ -= 1; |
| 58 #endif |
| 59 } |
| 60 |
| 61 int32_t no_gc_scope_depth() const { |
| 62 #if defined(DEBUG) |
| 63 return no_gc_scope_depth_; |
| 64 #else |
| 65 return 0; |
| 66 #endif |
| 67 } |
| 68 |
| 69 void IncrementNoGCScopeDepth() { |
| 70 #if defined(DEBUG) |
| 71 ASSERT(no_gc_scope_depth_ < INT_MAX); |
| 72 no_gc_scope_depth_ += 1; |
| 73 #endif |
| 74 } |
| 75 |
| 76 void DecrementNoGCScopeDepth() { |
| 77 #if defined(DEBUG) |
| 78 ASSERT(no_gc_scope_depth_ > 0); |
| 79 no_gc_scope_depth_ -= 1; |
| 80 #endif |
| 81 } |
| 82 |
| 83 #if defined(DEBUG) |
| 84 static void AssertCurrent(BaseIsolate* isolate); |
| 85 #endif |
| 86 |
| 87 protected: |
| 88 BaseIsolate() |
| 89 : top_resource_(NULL), |
| 90 #if defined(DEBUG) |
| 91 current_zone_(NULL), |
| 92 top_handle_scope_(NULL), |
| 93 no_handle_scope_depth_(0), |
| 94 no_gc_scope_depth_(0) |
| 95 #else |
| 96 current_zone_(NULL) |
| 97 #endif |
| 98 {} |
| 99 |
| 100 ~BaseIsolate() { |
| 101 // Do not delete stack resources: top_resource_ and current_zone_. |
| 102 } |
| 103 |
| 104 StackResource* top_resource_; |
| 105 Zone* current_zone_; |
| 106 #if defined(DEBUG) |
| 107 HandleScope* top_handle_scope_; |
| 108 int32_t no_handle_scope_depth_; |
| 109 int32_t no_gc_scope_depth_; |
| 110 #endif |
| 111 |
| 112 DISALLOW_COPY_AND_ASSIGN(BaseIsolate); |
| 113 }; |
| 114 |
| 115 } // namespace dart |
| 116 |
| 117 #endif // VM_BASE_ISOLATE_H_ |
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