File size: 2,041 Bytes
23d354c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | // OpenSTA, Static Timing Analyzer
// Copyright (c) 2026, Parallax Software, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
// The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software.
//
// Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// This notice may not be removed or altered from any source distribution.
#pragma once
namespace sta {
class Vertex;
class Search;
class GraphDelayCalc;
// Observer fired by Levelize during (re)levelization. Downstream consumers
// override the two hooks to invalidate caches that depend on vertex levels.
class LevelizeObserver
{
public:
virtual ~LevelizeObserver() = default;
virtual void levelsChangedBefore() = 0;
virtual void levelChangedBefore(Vertex *vertex) = 0;
};
// Default observer installed by Sta::makeObservers. Forwards level-change
// events to Search and GraphDelayCalc so their internal caches stay
// consistent. Subclass and override to extend (call the base methods first,
// then add your own invalidation).
class StaLevelizeObserver : public LevelizeObserver
{
public:
StaLevelizeObserver(Search *search, GraphDelayCalc *graph_delay_calc);
void levelsChangedBefore() override;
void levelChangedBefore(Vertex *vertex) override;
private:
Search *search_;
GraphDelayCalc *graph_delay_calc_;
};
} // namespace sta
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