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60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2026, Parallax Software, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software.
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//
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// Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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//
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// This notice may not be removed or altered from any source distribution.
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#pragma once
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namespace sta {
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class Vertex;
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class Search;
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class GraphDelayCalc;
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// Observer fired by Levelize during (re)levelization. Downstream consumers
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// override the two hooks to invalidate caches that depend on vertex levels.
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class LevelizeObserver
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{
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public:
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virtual ~LevelizeObserver() = default;
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virtual void levelsChangedBefore() = 0;
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virtual void levelChangedBefore(Vertex *vertex) = 0;
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};
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// Default observer installed by Sta::makeObservers. Forwards level-change
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// events to Search and GraphDelayCalc so their internal caches stay
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// consistent. Subclass and override to extend (call the base methods first,
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// then add your own invalidation).
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class StaLevelizeObserver : public LevelizeObserver
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{
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public:
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StaLevelizeObserver(Search *search, GraphDelayCalc *graph_delay_calc);
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void levelsChangedBefore() override;
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void levelChangedBefore(Vertex *vertex) override;
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private:
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Search *search_;
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GraphDelayCalc *graph_delay_calc_;
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};
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} // namespace sta
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