From 147582b5dcd86d1d92bb9a3fda9eb640300ccae3 Mon Sep 17 00:00:00 2001
From: Kris Zyp <kriszyp@gmail.com>
Date: Tue, 18 Feb 2020 22:50:41 -0700
Subject: [PATCH] ITS#9017 LMDB: allow using fixed file size on Windows

---
 libraries/liblmdb/mdb.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 80f09b2..9aefc8f 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -4469,7 +4469,14 @@ mdb_env_map(MDB_env *env, void *addr)
 		alloctype = MEM_RESERVE;
 	}
 
+#ifdef MDB_FIXEDSIZE
+	LARGE_INTEGER fsize;
+	fsize.LowPart = msize & 0xffffffff;
+	fsize.HighPart = msize >> 16 >> 16;
+	rc = NtCreateSection(&mh, access, NULL, &fsize, secprot, SEC_RESERVE, env->me_fd);
+#else
 	rc = NtCreateSection(&mh, access, NULL, NULL, secprot, SEC_RESERVE, env->me_fd);
+#endif
 	if (rc)
 		return mdb_nt2win32(rc);
 	map = addr;