From 6524a345d85998029946df1bff9464ebad241536 Mon Sep 17 00:00:00 2001
From: Vicente Mataix Ferrandiz <vmataix@altair.com>
Date: Tue, 12 Mar 2024 16:22:43 +0100
Subject: [PATCH] Revert "More replacement"

This reverts commit 4ea0d8cb11caaf27d05683bf5be2ea8b36a3a9d4.
---
 .../sparse_matrix_multiplication_utility.h    | 38 +++++++++----------
 1 file changed, 18 insertions(+), 20 deletions(-)

diff --git a/kratos/utilities/sparse_matrix_multiplication_utility.h b/kratos/utilities/sparse_matrix_multiplication_utility.h
index 46ad126ffb42..5034134816a9 100644
--- a/kratos/utilities/sparse_matrix_multiplication_utility.h
+++ b/kratos/utilities/sparse_matrix_multiplication_utility.h
@@ -272,11 +272,11 @@ class SparseMatrixMultiplicationUtility
         const double* values_b = B.value_data().begin();
 
         // Definition of TLS
-        struct TLS_max {
+        struct TLS {
             IndexType my_max = 0;
         };
 
-        const IndexType max_row_width = IndexPartition<IndexType>(nrows).for_each<MaxReduction<IndexType>>(TLS_max(), [&](IndexType i, TLS_max& rTLS) {
+        const IndexType max_row_width = IndexPartition<IndexType>(nrows).for_each<MaxReduction<IndexType>>(TLS(), [&](IndexType i, TLS& rTLS) {
             const IndexType row_beg = index1_a[i];
             const IndexType row_end = index1_a[i+1];
 
@@ -307,27 +307,25 @@ class SparseMatrixMultiplicationUtility
         IndexType* c_ptr = new IndexType[nrows + 1];
         c_ptr[0] = 0;
 
-        // Definition of TLS
-        struct TLS_col {
-            TLS_col(std::vector<std::vector<IndexType>>& rTmpCol)
-            {
-            #ifdef _OPENMP
-                const int tid = omp_get_thread_num();
-            #else
-                const int tid = 0;
-            #endif
-                t_col = &rTmpCol[tid][0];
-            }
-            IndexType* t_col;
-        };
+        // TODO: Replace with block_for_each
+        #pragma omp parallel
+        {
+        #ifdef _OPENMP
+            const int tid = omp_get_thread_num();
+        #else
+            const int tid = 0;
+        #endif
 
-        IndexPartition<IndexType>(nrows).for_each(TLS_col(tmp_col), [&](IndexType i, TLS_col& rTLS) {
+            IndexType* t_col = &tmp_col[tid][0];
 
-            const IndexType row_beg = index1_a[i];
-            const IndexType row_end = index1_a[i+1];
+            #pragma omp for
+            for(int i = 0; i < static_cast<int>(nrows); ++i) {
+                const IndexType row_beg = index1_a[i];
+                const IndexType row_end = index1_a[i+1];
 
-            c_ptr[i+1] = ProdRowWidth( index2_a + row_beg, index2_a + row_end, index1_b, index2_b, rTLS.t_col, rTLS.t_col + max_row_width, rTLS.t_col + 2 * max_row_width );
-        });
+                c_ptr[i+1] = ProdRowWidth( index2_a + row_beg, index2_a + row_end, index1_b, index2_b, t_col, t_col + max_row_width, t_col + 2 * max_row_width );
+            }
+        }
 
         // We initialize the sparse matrix
         std::partial_sum(c_ptr, c_ptr + nrows + 1, c_ptr);