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Use std::execution::par in dbEdgeProcessor and dbPolygonTools sorts #2364

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Use std::execution::par in dbEdgeProcessor and dbPolygonTools sorts #2364

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b116fe4
Use `std::execution::par` in `dbEdgeProcessor` and `dbPolygonTools` s…
nikosavola Jun 3, 2026
7e6119c
Make TBB linking conditional and improve backward compatibility of ex…
nikosavola Jun 4, 2026
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4 changes: 4 additions & 0 deletions src/db/db/db.pro
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Original file line number Diff line number Diff line change
Expand Up @@ -454,3 +454,7 @@ INCLUDEPATH += $$TL_INC $$GSI_INC
DEPENDPATH += $$TL_INC $$GSI_INC
LIBS += -L$$DESTDIR -lklayout_tl -lklayout_gsi

packagesExist(tbb) {
LIBS += -ltbb
}

16 changes: 14 additions & 2 deletions src/db/db/dbEdgeProcessor.cc
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Original file line number Diff line number Diff line change
@@ -1,3 +1,14 @@
#if __cplusplus >= 201703L
#if __has_include(<execution>)
#include <execution>
#endif
#endif

#if defined(__cpp_lib_execution)
#define PARALLEL_EXEC_POLICY std::execution::par,
#else
#define PARALLEL_EXEC_POLICY
#endif

/*

Expand Down Expand Up @@ -29,6 +40,7 @@
#include "tlProgress.h"
#include "gsi.h"


#include <vector>
#include <deque>
#include <memory>
Expand Down Expand Up @@ -2237,7 +2249,7 @@ EdgeProcessor::redo_or_process (const std::vector<std::pair<db::EdgeSink *, db::
} else {

// step 2: find intersections
std::sort (mp_work_edges->begin (), mp_work_edges->end (), edge_ymin_compare<db::Coord> ());
std::sort (PARALLEL_EXEC_POLICY mp_work_edges->begin (), mp_work_edges->end (), edge_ymin_compare<db::Coord> ());

y = edge_ymin ((*mp_work_edges) [0]);
future = mp_work_edges->begin ();
Expand Down Expand Up @@ -2422,7 +2434,7 @@ EdgeProcessor::redo_or_process (const std::vector<std::pair<db::EdgeSink *, db::
gs.reset ();
gs.reserve (n_props);

std::sort (mp_work_edges->begin (), mp_work_edges->end (), edge_ymin_compare<db::Coord> ());
std::sort (PARALLEL_EXEC_POLICY mp_work_edges->begin (), mp_work_edges->end (), edge_ymin_compare<db::Coord> ());

y = edge_ymin ((*mp_work_edges) [0]);

Expand Down
16 changes: 14 additions & 2 deletions src/db/db/dbPolygonTools.cc
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Original file line number Diff line number Diff line change
@@ -1,3 +1,14 @@
#if __cplusplus >= 201703L
#if __has_include(<execution>)
#include <execution>
#endif
#endif

#if defined(__cpp_lib_execution)
#define PARALLEL_EXEC_POLICY std::execution::par,
#else
#define PARALLEL_EXEC_POLICY
#endif

/*

Expand Down Expand Up @@ -28,6 +39,7 @@
#include "tlLog.h"
#include "tlInt128Support.h"


#include <algorithm>
#include <cmath>
#include <limits>
Expand Down Expand Up @@ -1838,7 +1850,7 @@ rasterize_impl (const db::polygon<C> &polygon, db::area_map<C> &am)
}

// sort edges
std::sort (edges.begin (), edges.end (), db::edge_ymin_compare<C> ());
std::sort (PARALLEL_EXEC_POLICY edges.begin (), edges.end (), db::edge_ymin_compare<C> ());

typename std::vector <edge_type>::iterator c = edges.begin ();

Expand Down Expand Up @@ -2761,7 +2773,7 @@ decompose_convex_to_trapezoids (const db::SimplePolygon &sp, bool horizontal, db
}
}

std::sort (edges.begin (), edges.end (), db::edge_ymin_compare<db::Coord> ());
std::sort (PARALLEL_EXEC_POLICY edges.begin (), edges.end (), db::edge_ymin_compare<db::Coord> ());

db::Coord y = db::edge_ymin (edges.front ());

Expand Down
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