| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #ifndef RUNTIME_VM_BASE_ISOLATE_H_ |
| #define RUNTIME_VM_BASE_ISOLATE_H_ |
| |
| #include "platform/assert.h" |
| #include "vm/globals.h" |
| |
| namespace dart { |
| |
| class HandleScope; |
| class StackResource; |
| class Thread; |
| class Zone; |
| |
| // A BaseIsolate contains just enough functionality to allocate |
| // StackResources. This allows us to inline the StackResource |
| // constructor/destructor for performance. |
| class BaseIsolate { |
| public: |
| #if defined(DEBUG) |
| void AssertCurrentThreadIsMutator() const; |
| #else |
| void AssertCurrentThreadIsMutator() const {} |
| #endif // DEBUG |
| |
| #if defined(DEBUG) |
| static void AssertCurrent(BaseIsolate* isolate); |
| #endif |
| |
| protected: |
| BaseIsolate() {} |
| |
| ~BaseIsolate() { |
| // Do not delete stack resources: top_resource_ and current_zone_. |
| } |
| |
| Thread* scheduled_mutator_thread_ = nullptr; |
| |
| // TODO(asiva): Currently we treat a mutator thread as a special thread |
| // and always schedule execution of Dart code on the same mutator thread |
| // object. The ApiLocalScope has been made thread specific but we still |
| // have scenarios where we do a temporary exit of an Isolate with live |
| // zones/handles in the API scope : |
| // - Dart_RunLoop() |
| // - IsolateSaver in Dart_NewNativePort |
| // Similarly, tracking async_stack_trace requires that we always reschedule |
| // on the same thread. |
| // We probably need a mechanism to return to the specific thread only |
| // for these specific cases. We should also determine if the embedder |
| // should allow exiting an isolate with live state in zones/handles in |
| // which case a new API for returning to the specific thread needs to be |
| // added. |
| Thread* mutator_thread_ = nullptr; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(BaseIsolate); |
| }; |
| |
| } // namespace dart |
| |
| #endif // RUNTIME_VM_BASE_ISOLATE_H_ |