From a3b5ceab38fabb725963e594708597706c69c102 Mon Sep 17 00:00:00 2001
From: Haoran Du <hrdu24@m.fudan.edu.cn>
Date: Sun, 7 Jun 2026 12:16:11 +0800
Subject: [PATCH] Fix Windows OpenMP wheel build

---
 .github/workflows/wheel_publish.yml              |  2 --
 cpp_easygraph/functions/community/louvain.cpp    |  6 +++---
 cpp_easygraph/functions/community/modularity.cpp | 11 ++++++++---
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/wheel_publish.yml b/.github/workflows/wheel_publish.yml
index cd39669c..2065873f 100644
--- a/.github/workflows/wheel_publish.yml
+++ b/.github/workflows/wheel_publish.yml
@@ -45,7 +45,6 @@ jobs:
         uses: pypa/cibuildwheel@v2.23.3
         with:
           output-dir: dist/
-          merge-multiple: true
 
       - name: Upload wheels
         uses: actions/upload-artifact@v4
@@ -74,4 +73,3 @@ jobs:
             password: ${{ secrets.PYPI_API_TOKEN }}
             skip-existing: true
 
-
diff --git a/cpp_easygraph/functions/community/louvain.cpp b/cpp_easygraph/functions/community/louvain.cpp
index d73137d6..bff5625a 100644
--- a/cpp_easygraph/functions/community/louvain.cpp
+++ b/cpp_easygraph/functions/community/louvain.cpp
@@ -312,10 +312,10 @@ double modularity_optimization_parallel_simplified(const Graph_L& G, vector<int>
                 }
 
                 if (best_comm != old_comm) {
-                    #pragma omp atomic update
+                    #pragma omp atomic
                     comm_weights[old_comm] -= weight_all;
 
-                    #pragma omp atomic update
+                    #pragma omp atomic
                     comm_weights[best_comm] += weight_all;
 
                     membership[u - 1] = best_comm;
@@ -541,4 +541,4 @@ py::object cpp_louvain_communities(py::object G, py::object weight, py::object t
     }
 
     return final_result;
-}
\ No newline at end of file
+}
diff --git a/cpp_easygraph/functions/community/modularity.cpp b/cpp_easygraph/functions/community/modularity.cpp
index e83d3ac1..e822b02e 100644
--- a/cpp_easygraph/functions/community/modularity.cpp
+++ b/cpp_easygraph/functions/community/modularity.cpp
@@ -2,6 +2,7 @@
 #include <unordered_map>
 #include <unordered_set>
 #include <string>
+#include <cstddef>
 #ifdef _OPENMP
 #include <omp.h>
 #else
@@ -18,8 +19,10 @@ void addVectorsInPlace(std::vector<double>& v1, std::vector<double>& v2) {
         throw std::invalid_argument("Vectors must have the same size for element-wise addition.");
     }
 
+    const std::ptrdiff_t n = static_cast<std::ptrdiff_t>(v1.size());
+
     #pragma omp parallel for
-    for (size_t i = 0; i < v1.size(); ++i) {
+    for (std::ptrdiff_t i = 0; i < n; ++i) {
         double sum = v1[i] + v2[i];
         v1[i] = sum;
         v2[i] = sum;
@@ -32,8 +35,10 @@ double dotProduct(const std::vector<double>& v1, const std::vector<double>& v2)
     }
     
     double result = 0.0;
+    const std::ptrdiff_t n = static_cast<std::ptrdiff_t>(v1.size());
+
     #pragma omp parallel for reduction(+:result)
-    for (size_t i = 0; i < v1.size(); ++i) {
+    for (std::ptrdiff_t i = 0; i < n; ++i) {
         result += v1[i] * v2[i];
     }
     return result;
@@ -205,4 +210,4 @@ py::object cpp_modularity(py::object G, py::object communities, py::object weigh
     double Q = e - sum_products;
     
     return py::float_(Q);
-}
\ No newline at end of file
+}