From feee86495003fcb29ca72a460c36db7b1fd8e6ae Mon Sep 17 00:00:00 2001
From: Alex Fabijanic <alex@pocoproject.org>
Date: Mon, 23 Jan 2023 08:06:55 +0100
Subject: [PATCH] fix(TZInfo): Static FastMutex fails to lock when issued from
 another thread on linux #3918

---
 Foundation/src/Timezone_UNIX.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Foundation/src/Timezone_UNIX.cpp b/Foundation/src/Timezone_UNIX.cpp
index 83623c3e6..bf3c47483 100644
--- a/Foundation/src/Timezone_UNIX.cpp
+++ b/Foundation/src/Timezone_UNIX.cpp
@@ -14,7 +14,7 @@
 
 #include "Poco/Timezone.h"
 #include "Poco/Exception.h"
-#include "Poco/Mutex.h"
+#include <mutex>
 #include <ctime>
 
 
@@ -31,7 +31,7 @@ public:
 
 	int timeZone()
 	{
-		Poco::FastMutex::ScopedLock lock(_mutex);
+		std::lock_guard<std::mutex> lock(_mutex);
 
 	#if defined(__APPLE__)  || defined(__FreeBSD__) || defined (__OpenBSD__) || POCO_OS == POCO_OS_ANDROID // no timezone global var
 		std::time_t now = std::time(NULL);
@@ -50,14 +50,14 @@ public:
 
 	const char* name(bool dst)
 	{
-		Poco::FastMutex::ScopedLock lock(_mutex);
+		std::lock_guard<std::mutex> lock(_mutex);
 
 		tzset();
 		return tzname[dst ? 1 : 0];
 	}
 
 private:
-	Poco::FastMutex _mutex;
+	std::mutex _mutex;
 };