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// 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 VM_BASE_ISOLATE_H_
#define VM_BASE_ISOLATE_H_
namespace dart {
class HandleScope;
class StackResource;
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:
StackResource* top_resource() const { return top_resource_; }
void set_top_resource(StackResource* value) { top_resource_ = value; }
Zone* current_zone() const { return current_zone_; }
void set_current_zone(Zone* zone) { current_zone_ = zone; }
HandleScope* top_handle_scope() const {
#if defined(DEBUG)
return top_handle_scope_;
#else
return 0;
#endif
}
void set_top_handle_scope(HandleScope* handle_scope) {
#if defined(DEBUG)
top_handle_scope_ = handle_scope;
#endif
}
int32_t no_handle_scope_depth() const {
#if defined(DEBUG)
return no_handle_scope_depth_;
#else
return 0;
#endif
}
void IncrementNoHandleScopeDepth() {
#if defined(DEBUG)
ASSERT(no_handle_scope_depth_ < INT_MAX);
no_handle_scope_depth_ += 1;
#endif
}
void DecrementNoHandleScopeDepth() {
#if defined(DEBUG)
ASSERT(no_handle_scope_depth_ > 0);
no_handle_scope_depth_ -= 1;
#endif
}
int32_t no_gc_scope_depth() const {
#if defined(DEBUG)
return no_gc_scope_depth_;
#else
return 0;
#endif
}
void IncrementNoGCScopeDepth() {
#if defined(DEBUG)
ASSERT(no_gc_scope_depth_ < INT_MAX);
no_gc_scope_depth_ += 1;
#endif
}
void DecrementNoGCScopeDepth() {
#if defined(DEBUG)
ASSERT(no_gc_scope_depth_ > 0);
no_gc_scope_depth_ -= 1;
#endif
}
int32_t no_callback_scope_depth() const {
return no_callback_scope_depth_;
}
void IncrementNoCallbackScopeDepth() {
ASSERT(no_callback_scope_depth_ < INT_MAX);
no_callback_scope_depth_ += 1;
}
void DecrementNoCallbackScopeDepth() {
ASSERT(no_callback_scope_depth_ > 0);
no_callback_scope_depth_ -= 1;
}
#if defined(DEBUG)
static void AssertCurrent(BaseIsolate* isolate);
#endif
protected:
BaseIsolate()
: top_resource_(NULL),
current_zone_(NULL),
#if defined(DEBUG)
top_handle_scope_(NULL),
no_handle_scope_depth_(0),
no_gc_scope_depth_(0),
#endif
no_callback_scope_depth_(0)
{}
~BaseIsolate() {
// Do not delete stack resources: top_resource_ and current_zone_.
}
StackResource* top_resource_;
Zone* current_zone_;
#if defined(DEBUG)
HandleScope* top_handle_scope_;
int32_t no_handle_scope_depth_;
int32_t no_gc_scope_depth_;
#endif
int32_t no_callback_scope_depth_;
DISALLOW_COPY_AND_ASSIGN(BaseIsolate);
};
} // namespace dart
#endif // VM_BASE_ISOLATE_H_