Daniel Andersson
fc8286ae71
Safepointing is not yet implemented, so helper threads can only allocate when growth control is off and no Dart code is running. But extend unit test to ensure this code path remains exercised as more functionality is added. BUG= R=asiva@google.com Review URL: https://codereview.chromium.org//1250463004 .
70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_BASE_ISOLATE_H_
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#define VM_BASE_ISOLATE_H_
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#include "platform/assert.h"
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#include "vm/globals.h"
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namespace dart {
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class HandleScope;
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class StackResource;
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class Thread;
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class Zone;
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// A BaseIsolate contains just enough functionality to allocate
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// StackResources. This allows us to inline the StackResource
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// constructor/destructor for performance.
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class BaseIsolate {
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public:
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#if defined(DEBUG)
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void AssertCurrentThreadIsMutator() const;
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#else
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void AssertCurrentThreadIsMutator() const {}
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#endif // DEBUG
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int32_t no_callback_scope_depth() const {
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return no_callback_scope_depth_;
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}
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void IncrementNoCallbackScopeDepth() {
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ASSERT(no_callback_scope_depth_ < INT_MAX);
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no_callback_scope_depth_ += 1;
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}
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void DecrementNoCallbackScopeDepth() {
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ASSERT(no_callback_scope_depth_ > 0);
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no_callback_scope_depth_ -= 1;
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}
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#if defined(DEBUG)
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static void AssertCurrent(BaseIsolate* isolate);
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#endif
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protected:
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BaseIsolate()
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: mutator_thread_(NULL),
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no_callback_scope_depth_(0) {
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}
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~BaseIsolate() {
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// Do not delete stack resources: top_resource_ and current_zone_.
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}
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Thread* mutator_thread_;
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int32_t no_callback_scope_depth_;
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private:
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// During migration, some deprecated interfaces will default to using the
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// mutator_thread_ (can't use accessor in Isolate due to circular deps).
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friend class StackResource;
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DISALLOW_COPY_AND_ASSIGN(BaseIsolate);
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};
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} // namespace dart
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#endif // VM_BASE_ISOLATE_H_
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