From 1f792e6b9c9b41c4da8f8996e3eb325e444b0099 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sat, 4 Apr 2020 12:24:12 +0200
Subject: hgridshift/vgridshift: defer grid opening when grid has already been
 opened

Relates to #2115

With the fix of https://github.com/OSGeo/PROJ/pull/2128, transforming between
EPSG:4326+3855 and EPSG:4269+5703 leads to many operations with many grids,
and opening a file handle for each operation saturates the limit of 1024
file handles opened simunalteously. This fix defers grid opening when a
transformation has already been instanciated with the same grid.
---
 src/malloc.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/malloc.cpp')

diff --git a/src/malloc.cpp b/src/malloc.cpp
index 9ac28546..10ab2fad 100644
--- a/src/malloc.cpp
+++ b/src/malloc.cpp
@@ -264,4 +264,6 @@ void proj_cleanup() {
   pj_clear_initcache();
   pj_deallocate_grids();
   FileManager::clearMemoryCache();
+  pj_clear_hgridshift_knowngrids_cache();
+  pj_clear_vgridshift_knowngrids_cache();
 }
-- 
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