Merge pull request #2787 from rouault/vgrid_perf_improvements

GeoTIFF grid reading: perf improvements (fixes #2785)

1 files changed, 15 insertions, 0 deletions

diff --git a/include/proj/internal/lru_cache.hpp b/include/proj/internal/lru_cache.hpp
index b7aff6b9..b2e997b3 100644
--- a/include/proj/internal/lru_cache.hpp
+++ b/include/proj/internal/lru_cache.hpp
@@ -160,6 +160,21 @@ class Cache {
     keys_.splice(keys_.begin(), keys_, iter->second);
     return iter->second->value;
   }
+
+  /**
+   *	The const reference returned here is only
+   *    guaranteed to be valid till the next insert/delete
+   */
+  const Value* getPtr(const Key& k) {
+    Guard g(lock_);
+    const auto iter = cache_.find(k);
+    if (iter == cache_.end()) {
+      return nullptr;
+    }
+    keys_.splice(keys_.begin(), keys_, iter->second);
+    return &(iter->second->value);
+  }
+
   /**
    * returns a copy of the stored object (if found)
    */