From 8c97ea4df1ce38d7ece2dda23440df2f9fdfbc75 Mon Sep 17 00:00:00 2001
From: conrad <conrad@localhost.localdomain>
Date: Tue, 13 Jul 2021 12:23:37 +1000
Subject: [PATCH] add .reset_cache()

---
 include/armadillo_bits/SpMat_bones.hpp |  1 +
 include/armadillo_bits/SpMat_meat.hpp  | 39 ++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/include/armadillo_bits/SpMat_bones.hpp b/include/armadillo_bits/SpMat_bones.hpp
index 99a7688d..c529971c 100644
--- a/include/armadillo_bits/SpMat_bones.hpp
+++ b/include/armadillo_bits/SpMat_bones.hpp
@@ -360,6 +360,7 @@ class SpMat : public SpBase< eT, SpMat<eT> >
   inline const SpMat& sprandn(const SizeMat& s,                         const double density);
   
   inline void reset();
+  inline void reset_cache();
   
   //! don't use this unless you're writing internal Armadillo code
   inline void reserve(const uword in_rows, const uword in_cols, const uword new_n_nonzero);
diff --git a/include/armadillo_bits/SpMat_meat.hpp b/include/armadillo_bits/SpMat_meat.hpp
index 26a23466..0f1bd545 100644
--- a/include/armadillo_bits/SpMat_meat.hpp
+++ b/include/armadillo_bits/SpMat_meat.hpp
@@ -4501,6 +4501,45 @@ SpMat<eT>::reset()
 
 
 
+template<typename eT>
+inline
+void
+SpMat<eT>::reset_cache()
+  {
+  arma_extra_debug_sigprint();
+  
+  sync_csc();
+  
+  #if defined(ARMA_USE_OPENMP)
+    {
+    #pragma omp critical (arma_SpMat_cache)
+      {
+      cache.reset();
+      
+      sync_state = 0;
+      }
+    }
+  #elif (!defined(ARMA_DONT_USE_STD_MUTEX))
+    {
+    cache_mutex.lock();
+    
+    cache.reset();
+    
+    sync_state = 0;
+    
+    cache_mutex.unlock();
+    }
+  #else
+    {
+    cache.reset();
+    
+    sync_state = 0;
+    }
+  #endif
+  }
+
+
+
 template<typename eT>
 inline
 void