From 34c24653f7dfcfc8f793fa2020bd70bcd7d9b5a7 Mon Sep 17 00:00:00 2001
From: evoskuil <eric@voskuil.org>
Date: Sun, 17 Mar 2024 17:41:55 -0400
Subject: [PATCH] Eliminate boost::thread dependency.

---
 include/bitcoin/database/primitives/head.hpp |  4 ++--
 test/memory/accessor.cpp                     | 13 ++-----------
 2 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/include/bitcoin/database/primitives/head.hpp b/include/bitcoin/database/primitives/head.hpp
index cc9a44de..aacb8ac5 100644
--- a/include/bitcoin/database/primitives/head.hpp
+++ b/include/bitcoin/database/primitives/head.hpp
@@ -20,8 +20,8 @@
 #define LIBBITCOIN_DATABASE_PRIMITIVES_HEAD_HPP
 
 #include <algorithm>
+#include <shared_mutex>
 #include <bitcoin/system.hpp>
-#include <bitcoin/database/boost.hpp>
 #include <bitcoin/database/define.hpp>
 #include <bitcoin/database/memory/memory.hpp>
 
@@ -96,7 +96,7 @@ class head
 
     storage& file_;
     const Link buckets_;
-    mutable boost::upgrade_mutex mutex_;
+    mutable std::shared_mutex mutex_;
 };
 
 } // namespace database
diff --git a/test/memory/accessor.cpp b/test/memory/accessor.cpp
index 5f9618a4..f1c22d02 100644
--- a/test/memory/accessor.cpp
+++ b/test/memory/accessor.cpp
@@ -31,19 +31,10 @@ BOOST_AUTO_TEST_CASE(accessor__construct_shared_mutex__unassigned__nulls)
     BOOST_REQUIRE(is_null(instance.end()));
 }
 
-BOOST_AUTO_TEST_CASE(accessor__construct_upgrade_mutex__unassigned__nulls)
-{
-    boost::upgrade_mutex mutex;
-    accessor instance(mutex);
-    BOOST_REQUIRE(is_null(instance.data()));
-    BOOST_REQUIRE(is_null(instance.begin()));
-    BOOST_REQUIRE(is_null(instance.end()));
-}
-
 BOOST_AUTO_TEST_CASE(accessor__destruct__shared_lock__released)
 {
-    boost::upgrade_mutex mutex;
-    auto access = std::make_shared<accessor<boost::upgrade_mutex>>(mutex);
+    std::shared_mutex mutex;
+    auto access = std::make_shared<accessor<std::shared_mutex>>(mutex);
     BOOST_REQUIRE(!mutex.try_lock());
     access.reset();
     BOOST_REQUIRE(mutex.try_lock());