From 013aa9babdc55b46ea472980660dec4d645d960b Mon Sep 17 00:00:00 2001
From: Kazuki Yamaguchi <k@rhe.jp>
Date: Fri, 21 Aug 2020 17:33:25 +0900
Subject: [PATCH] ossl.c: do not set locking callbacks on LibreSSL

Similarly to OpenSSL >= 1.1.0, LibreSSL 2.9.0 ensures thread safety
without requiring applications to set locking callbacks and related
functions are made no-op.
---
 ext/openssl/extconf.rb | 1 -
 ext/openssl/ossl.c     | 8 +++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/ext/openssl/extconf.rb b/ext/openssl/extconf.rb
index 73a4cdc3b..bd7c5770d 100644
--- a/ext/openssl/extconf.rb
+++ b/ext/openssl/extconf.rb
@@ -130,7 +130,6 @@ def find_openssl_library
 if !have_struct_member("SSL", "ctx", "openssl/ssl.h") || is_libressl
   $defs.push("-DHAVE_OPAQUE_OPENSSL")
 end
-have_func("CRYPTO_lock") || $defs.push("-DHAVE_OPENSSL_110_THREADING_API")
 have_func("BN_GENCB_new")
 have_func("BN_GENCB_free")
 have_func("BN_GENCB_get_arg")
diff --git a/ext/openssl/ossl.c b/ext/openssl/ossl.c
index 523d72e2b..3e125c1fa 100644
--- a/ext/openssl/ossl.c
+++ b/ext/openssl/ossl.c
@@ -9,7 +9,13 @@
  */
 #include "ossl.h"
 #include <stdarg.h> /* for ossl_raise */
-#include <ruby/thread_native.h> /* for OpenSSL < 1.1.0 locks */
+
+/* OpenSSL >= 1.1.0 and LibreSSL >= 2.9.0 */
+#if defined(LIBRESSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER >= 0x10100000
+# define HAVE_OPENSSL_110_THREADING_API
+#else
+# include <ruby/thread_native.h>
+#endif
 
 /*
  * Data Conversion